Craftsman 161216300 User Manual ENGINE ANALYZER Manuals And Guides 1006230L
User Manual: Craftsman 161216300 161216300 CRAFTSMAN ENGINE ANALYZER - Manuals and Guides View the owners manual for your CRAFTSMAN ENGINE ANALYZER #161216300. Home:Automotive Parts:Craftsman Parts:Craftsman ENGINE ANALYZER Manual
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Ie J Y2 owners manual MODEL NO. 161.216300 INE ANALYZ FOR 12 VOLT OPERATING Caution: SAFETY Read Rules For Safe Operation and Complete TUNE-UP Operating Test Procedures REPAIR SYSTEMS INSTRUCTIONS RULES PROCEDURES PARTS Carefully IIIII J_ IIIII .I I III illll U III!IIII L IllIII . . I II I ,JJ ..... II IJLJIIJIII I III1[ SEARS, ROEBUCK CH!CAGO, I IIIIIII PRINTED III III IN U.S.A, I I iilliiII III II I I IIIIIIIIIIIIIIIIIIII . II IJ IIIII[ . l Ill . . . I III II AND CO. U.S.A. ILLINOIS I I 60684 IIIIIIIIIIIIIIIIIWHIIIIIIIII II II 2-168302 RULES FOR SAFE AUTOMOTIVE WARNING TESTING -- READ CAREFULLY Read this OperaUon Manual and these Rules for Safe Automotive Testing carefully. Failure to follow instructions and safety rules could result in sedous bodily injury and/or damage to the Instrument. 1. Before starting the engine, set the parking brake and place the gear selector in NEUTRAL on standard transmissions and PARK on automatic transmiasionl, 2. The carbon monoxide m exhaustgas is highly tOxiC To avoid asphyxiation, always operate vehicle in • well-ventilated ares, If vehicle ss tn an enclose_l area, exhaust should be routed directly 3 4 to the outside vie leak-proof exhaust contact with battery electrolyte Electrolyte batteries should of exploswe gases be To To avoid the possibility of a flash fire, do not smoke or permit flame or spark to occur near carburetor, fuel hne, fuel filter, fuel pump or other potential sources of spdled gasoline or gasottne vapors 1! Naver remove radlator cap while the engme escaping under pressure can cause serious 12 The jack supphed changing wheels. vehicle is on jack. 13. When do not disturb the baltery charger connections is charging, and always turn charger off before Never add acid to a battery once the battery has been placed service; doing so may result _n dangerous spattering electrolyte. Never look directly into carburetor throat whde engine _s cranking or running A sudden backfire can cause serious burns. ts hot, Hot coolant burns. with the vehicle should be used onty for Never crawl under car or run engine while mak=ng electrical test connect=ons to the vehicle, do nol usa the carburetor or other fuel system components ground connection, as a spark could _gn=te the gasoline and cause a fire or an explosion disconnecting the battery chps When removing or reconnecting battery cables, make sure =gnition switch and all accessories are turned off A techmque used by many mechanics _s to carefully blow across the top of the baltery to remove any hydrogen gas accumulation before connechng or disconnecting battery clips 6. mamfotd, redactor or high-voltage 10 seek The gases generated by a charging battery are highly explosive Do not smoke or permit flame or spark Io occur near a battery at any hme, particularly when _t =scharging. Any room avoid sparks, while battery Oo not tuch hot exhaust 9 can burn with targe quanhhes of clean water; m case of eye contact, medical atd immediately or compartment containing charging well ventilated to prevent accumulation 8. hose. holes m clothing, burn skin and cause permanent damage to eyes Always wear splash-proof safety goggles when work=ng around the battery tf battery electrolyte rs splashed m the eyes or on skin. immediately flush the affected area Ior 15 minutes 5. Keep hands, hair, neckbe, loose clothing and test leads well away from fan blades, fan belt, power steering belt, air condrtioner belt and other moving engine parts as serious injury Could result from entanglement. spark plug and Cod terminals Spark voltages are not normally lethal, but an involuntary lark of the hands or arms caused by electrical shock may result =n,nJury. An automobile battery is capabfe of producing very high currents Therefore, exercise reasonable care when working near the battery to avoid electrical connections through tools, wristwatch, etc Avoid 7. 14 Do not let test engine parts, cables rest or tall on or near 15 Use cauhon when d=sconnectmg rgmhon carefully at the boot w_th the pr'oper tool as a vapors hot or mowng cables Pull cables =n of IMPORTANT THIS MANUAL PRESENTS COMPLETE HOOKUP INSTRUCTIONS FOR THE SEARS 161.2163 ENGINE ANALYZER. IT ALSO DESCRIBES MANY OF THE TESTS THAT THIS INSTRUMENT IS CAPABLE OF PERFORMING AS WELL AS WHEN THEY SHOULD BE USED BASED ON VEHICLE PERFORMANCE, TUNE-UP OR TROUBLE ENCOUNTERED. CONSULT YOUR VEHICLE SERVICE MANUAL FOR SPECIFIC TUNE-UP INFORMATION AND TEST PROCEDURES. FOLLOW THE MANUFACTURER'S SPECIFICATIONS AND TEST PROCEDURES FOR ADJUSTING DWELL ANGLE ESPECIALLY ON VEHICLES WITH MODERN ELECTRONIC IGNITION AND EMISSION CONTROLS. DO SERVICE A VEHICLE WITHOUT THE MANUFACTURER'S INSTRUCTIONS AND SPECIFICATIONS, VEHICLE MANUAL, SOURCES FOR SERVICE AND NOT IDLE SPEED, ATTEMPT TO INFORMATION. The following is a tiStof publishers who have service manuals for your specific vehicle at nominal cost. Write to them for availability and prices, specifying the make, style, and model year of your vehrcle. Amedcan Molora Corporallon Myr=ad 8835 General Drive Plymouth Township M_ch_gan 48170 Ch ry$1er Corporation Dyment D_Stnbution Service Service Publication 20026 Progress Drive Strongevdle, Ohio 44136 Fgcd Publication Department Hblm Incorporated Post Office Box 07150 Detroit, Michigan 48207 Buick OTHER Tuar Company Post Office Box 354 Fhnt, M_chigan 48501 Oldsmobile Lansing L=thographers Post Office Box 23188 Lansing. Michigan 48909 Cadillac, Chevrolet, Pontiac Helm incorporated Post Office Box 07130 Detroit, Michigan 48207 Domestic Chdton ChHton Radnor, SOURCES - Nonfactory and Impod Cart Book Company Way PA 19089 Cordura Publications M_tchell Manuals, Inc. Post Office Box 26260 San Diego, CA 92128 Motor's Auto Repair Manual Hearst Company 250 W 55th Street New Yo_k, N Y 10019 ENGINE ANALYZER CONTROLS, CONNECTIONS, AND ACCESSORIES Q ANGE SELECTOR This selects the Dwell or Points/Low (_ DESCRIPTION. The Model 161.2163 Engine Analyzer has a clearly labeled meter and controls as shown in the Master Hookup diagram, Figure 1 below. QMETER This meter displays the following scares: • RPM = Volts 0-6000 0.1200 0-16 (_ • Dwell 0-45 degrees (8 cylinder) 0-90 degrees (4 cylinder) 0-60 degrees (6 cylinder) GM C_3 system Mixture Control Duty Cycle Solenoid also uses the 0-60 degrees scale. • Low Volts 0-3.2 Q ETER ZERO ADJUSTER Before connecting any leads to the engine, rotate the adjuster slowly with a screwdriver until the pointer is on zero, @ FUNCT1ON SELECTOR This selects the Volts, Amps, Dwell/Points, 8 cytinder RPM functions of the analyzer. DWELLiRPM/C-3/POINTS/LOW VOLTS LEAD The Green clip is used for measuring Dwetl, RPM, General Motors C-3 Mixture Control Solenoid Duty Cycle, Points Resfstance, and Low Volts. For Dwell, RPM and Points Resistance testing, connect this clip to the negative (-) side of the ignition coi! in Figure i and 3 through 10, Connections for other tests will be * shown and described in specific test procedures. • Points OK/Bad/Open • Amps 0-!00 Q Volts lunctions of the analyzer, as well as the 0-1200 or 0-6000 RPM ranges. BATTERY LEAD The Red clip is connected to the positive (+) battery terminal, and the Black clip is connected to a clean, secure engine ground. For safety reasons, do not use the negative (-) battery terminal or any fuel system components for ground connections. Vapors or gasses in these areas can cause an explosion if a spark occurs during connection. The Red and Black clips should be connected as shown for all tests. AMPS LEAD AND SHUNT The Amps Lead and shunt are used for measuring alternator output. To maintain simplicity in overall analyzer usage, connect this lead only when measuring alternator output, page 7, "AMP LEAD AND SHUNT HOOKUP REQUIREMENT" and 4, 6, or STEP 9 GREEN ALTERNATOR OUTPUT W!RE COIL REFER TO "AMP LEAD AND SHUNT HOOKUP REQUIREMENT" SECTION, STEPS AS INDICATED, PAGE 7 BATTERY DISTRIBUTOR Sears STEPS 2 --S 161.2163 Master FIGURE Hookup 1 Diagram 1+ GM HEI ADAPTOR The GM HEt Adaptor is used to provide Connection to the "TACH" terminal on GM HEt systems. See Figure 7 for typical installation. 2+ GM DIAGNOSTIC ADAPTOR 3. ACCESSORIES The GM Diagnostic Adaptor is used to make connection to vehicles equipped with the GM Diagnostic Connector, (1976 - 1982). It is also used'to make connection to Toyota vehicles which use the tlA (Integrated Ignition Assembly). See Figures 9 and 10 for installatiOn. FORD COIL CLIP The Ford Coil Clip is used for ignition systems which have booted ignition coil connectiOnS. See Figure 4 for installation, FIGURE 2 PRIMARY TACH CONNECTIONS TO BALLAST GREEN CLIP GREEN CLIP BAT.) COIL CONTROL UNIT TO CONTROL UNIT PRIMARY TACH CONNECTION -- GREEN Clip At! Chrysler Corporation Electronic ignition, ,6 & 8 Cylinder shown 1972 - 1985 PRIMARY TACH CONNECTION -- GREEN Clip Ford Solid State & DuraSpark Systems 1975 • 1985 + FIGURE 3 FIGURE $ ............................. TO IGN. SWITCH ,,,,r,, .TO DIST, GREEN___ INCLUDED ADAPTER ] PRIMARY TACH/DWELL CONNECTION _ GREEN Clip 1974 Ford Electronic and All Breaker Potnls Ignition Systems PRIMARY TACH CONNECTION -- GREEN Clip FOrd TFI Systems 1981 - 1985 FIGURE 4 FIGURE 6 -)TOIGNITION SWITCH DELCO HEI WITH INTEGRAL COIL INSERT DIAGNOSTIC ADAPTER l AOAPTER PRIMARY TACH CONNECTION Delco HEr 1974. FIGURE _ 1985 GREEN _'. _,._ Clip REMOVE CAP FROM GREEN TACH TEST CONNECTOR 7 PRIMARY Toyota TACH CONNECTION IIA (Integraled Ignition _ GREEN Assembly) Clip 1983 - 1985 F}GURE t0 Note: This is NOT DWELL PRIMARY TACH CONNECTION -- GREEN Delco HE! i9741985 External Coil FIGURE a Tach Connection CONNECTOR Clip SPADE TERMINAL ADAPTER GM TA(_H (GREEN) a GREEN CLIP PRIMARY polnl. CONNECTION _ GREEN GM Dia_lnosfic Conneclor and Delco HEI Syslems !976 - 1982 FIGURE 9 Clip / I GREEN C3 (Computer Command Pertormance Check CLIP or Ground Jumper _:IGURE _ Control) ONLY See Vehicle 11 Service Manual ELECTRICAL SYSTEM-PRELIMINARY CHECKS E. INTRODUCTION. Before performing any electrical system tests, carefully read the following information. These checks will help you to identify the more common electrical system problems and will serve as a general guide formaking electrical system tests. VEHICLE CHECKS. A, CONSULT THE VEHICLE MANUAL OF THE VEHICLE BEING TESTED FOR SPECIFIC VOLTAGE AND CURRENT SPECIFICATIONS AND TEST PROCEDURES. B, Check the fan belt; tension facturer's specifications. C, Check the generator or alternator pulley and mounting bolts. They should be tight. Make sure that the charging and cranking system wiring and the battery cables are in good condition and that connections are clean and tight. Make sure that the battery is clean and that the liquid level in each cell is above the plates on vent-cap style batteries or that the green "eye" is visible on maintenance-free batteries, g. it according to the manu- Check the "CCA" (Cold Cranking Amps) rating of the vehicle battery, often listed on the battery. This number should equal or exceed the specification given by the manufacturer for the vehicle's engine. If the battery capacity is too small, a cord engine may crank slowly or not at all on very cold days. If specifications are not available, the following method may be used to determine the recommended battery capacity:_ 8 CYLINDER ENGINES, The cubic inch displacement (CID -- not liters) equals the Cold Cranking Amp requirement. For e _ample, a 350 cubic inch displacement engine equals a 350 CCA minimum. For cold climates, add 20% of the cubic inch dis- • ptacement to the CCA. Therefore, 350 x .2 (20%) = 70, 350 + 70 = 420. A 420 CCA or greater rated battery should be uSed. 6 CYLINDER ENGINES. Calculate the Cubic inch displacement per cylinder and multiply by 8. For example a 231 cubic inch displacement 6 cylinder engine = 38.5 cubic inch displacement per cylinder, Then, 38,5 x 8 = 308 CCA minimum, For cold climates, add 20% of the adjusted cubic inch displacement to the CCA. Therefore, 308 x .2 (20%) = 62. 308 + 62 = 370. A 370 CCA battery or greater should be used. • 4 CYLINDER ENGINES. Multiply the cubic inch displacement of the engine by 2. For example, a t51 cubic inch displacement engine x 2 = 302 CCA. For cold climates, add 20% of the adjusted cubic inch displacement to the CCA. Therefore, 302 x .2 20% = 60. 302 + 60 = 362. A 362 CCA or greater rated Check the alternator/generator output rating as listed on its color-coded tag or _tamped on the alternator/ generator frame. Forexample, 60A or IOOAindicates a 60 Ampere or 100 Ampere alternator/generator. This rating should equal or exceed the manufacturer's specification for the vehicle as equipped. An alternator/generator which is elect[ically too small for the vehicle cannot charge a battery when the vehicle is run under heavy electrically loaded conditions (lights, HI fan, air conditioning et¢.) The result.could be a NO Crank/Start condition after prolonged operation under heavy electrical load conditions, F. Electrical specifications are generally given for an engine which is at normal operating temperature, tf the ehgine is cold and will start; operate the engine at idle speed for at least 10 minutes before making any tests or until it is fully warm (upper radiator hose is hot). If the engine wil! not start and the cranking system tests must be made on a cold engine, cranking voltage may be slightly lower than specificationsstate. CRANKING VOLTAGE AND BATTERY CONDITION If the engine cranks slowly or not at afl, the battery, cranking motor, and associated wiring may be at fault. Check the cranking voltage as indicated below. 1. Connect the analyzer to the vehicle as shown in Figure 1, and 3 through !0. The AMP LEAD AND SHUNT hookup is not necessary for this test. 2. Disable the engine from starting as explained vehicte service manual, See Figure 13. Function SelectorVolts 3 4_ 5. 6. 7. in your Crank the engine while observing the 16 volt scale on the analyzer, Normal Result- 9.6 volts or more at 70 ° F. Voltage will drop slightly as temperature decreases. If the results are significantly out of specification consuit your vehicle service manual for further diagnosis. If battery voltage remains abnormally high (above approximately 10.5 volts) on a slow or no cranking engine, the problem may be loose or corroded connection(s) in the cranking circuit. Follow the procedure described below. CRANKING CIRCUIT VOLTAGE LOSS TEST, THE CRANK1NG CIRCUIT VOLTAGE LOSS TEST checks for voltage losses in the cranking system, 1. Perform the instructions listed under "Electrical System -- Preliminary Checks," 2. Disable the engine from starting as explained in your vehicle service manual. See Figure 13. 3. Function Selector - Dwell/Points 4. Range Selector - Points/Low Volts 5. Use the Green and Black clipswhile referring to Figure 12. Connect the clips alternately between 1 and 2, 2 and 3, 4 and 5, 4 and 6, 6 and 7, 7 and 8, 7 and 9", 8 and 9, and 8 and !0, Record the results at each point as read on the 3.2 volt scale of the meter with the engine cranking. 6. if the meter reads backwards (left of zero) during testing, reverse the Green and Black clip connections. 7. During this test, no reading should be higher than 0.2 volt. 8. To restart the engine, reverse the "Disabling Pro* cedure." 9, If any reading is significantly higher than 0.2 volts," check the cable or connections involved. Clean and tighten the connections. Replace broken, cracked or corroded parts when needed. " The reading between 7 and 9, the starter solenoid voltage drop, may be a little h{gher than 0.2 volts and be satisfactory. Refer to your vehicle manua! for specifications. CHARGINL_ _Y_ 1_M VUL i/_L_I;: It is the function of the charging system to keep the battery charged when the engine is running and to power the rest of the vehicle's electrical load requirement (ignition, lights, fan, etc), If this system fails, the result will be a discharged or possibly"dead" battery. !. Connect the analyzer to the vehicle as shownin Figure !, and 3 through !0, The AMP LEAD AND SHUNT hookup is not necessary, 2. Function Selector - Volts 3. Start the engine and allow it to warm to normal operating temperature. Operate it at curb idle. 4. With all accessories off observe the 16 volt scale on the analyzer. 5. Normal Result - 13.2 to 15.2 volts or as specified in the vehicle service manual, 6, Function Selector - RPM, 4, 6, or 8 cylinder to match engine under test. 7. Range Selector - O_Y_)O0 RPM 8. Select a step on the fast idle cam which will maintain engine speed between t800 and 2800 RPM, or have 'an assistant hold engine speed in this range, Hold this speed through Step 12, 9, Function Selector - Volts { 10. Observe the 16 volt scale on the analyzer. The voltage should not have changed from Step 5 more than about .5 volts, 11. Load the electrical system by turning on the lights, HI fan, and wipers. 12. Observe the 16 volt scale on the analyzer, Voltage_ should not drop below about 13.0 volts, NOTE Cranking Circuit Voltage F|GURE Loss, 12 Typical Circuit This is a representative Your vehicle may use ponents or locations, sample of one type of cranking a difle_en_ (_iTcuit with dif|erent circuit, com- 13. Shut off all accessories, idle, and shut it off. 14. If the results obtained return the engine to curb in Steps 5, 10, or 12 are signifi - cantly different from those shown or vehicle service manual values, further diagnosis may be required: see your vehicle service manual. MISCELLANEOUS VOLTAGE TESTS This analyzer can perform many of the voltage tests called out in the vehicle service mandal, such as voltages at lamp sockets, motors, solenoids and relays. 1. To measure voltage on the 16 volt scale: + Function Selector - Volts / AMP LEAD AND SHUNT HOOKUP REQUIREMENT If the results obtained in the CHARGING SYSTEM VOLTAGE Test indicated a problem with the charging system, it may be necessary to measure the alternator output current to determine if the alternator is functioning properly. To do this, follow the test procedure as outlined in your vehicle service manual; since the procedure is unique to each vehicle, To use the 2163 Sears Analyzer for the alternator output test, the following procedure describes the method of connecting the current shunt to the charging system. 1, Disconnect negative (-) battery cable. 2. Remove the alternator output wire(s) from the output terminal of the alternator. 3, Connect the removed wire(s) to the shunt as shown in Figure 1, using #!0-32 x Vzto _Y4" hardware as shown. 4, Attach the slotted end of the shunt,to the alternator output terminal. 5, Make sure all connections are clean and tight and that NO PART OF THE SHUNT OR CONNECTIONS ARE TOUCHING VEHICLE GROUND. 6+ Re-connect the negative (-) battery cable. 7. Connect the remainder of the analyzer's leads to the vehicle as shown in Figures 1, and 3 through i0. 8. Function Selector- Amps 9. Perform the following steps to assure that the shunt is connected to the Amp Lead in the proper polarity. 1. Engine off. 2. Function Selector- Volts 3. ObserVe the reading on the 16 volt scale of the analyzer, 4. Start the engine. Wait a few moments and observe the reading on the 16 volt scare. If it is higher than Step 3, go to "A" below. !f it is lower than Step 3, go to "B" below. "A" FunctiOn Selector - Amps, Observe the meter pointer movement. If it is above the "O" at the left hand side of the meter scale, polarity is correct. If it deflects below "O", shut off the engine and reverse the "slip on" connections at the shunt. Be careful not to let pliers or Shunt touch ground when reversing these connections. "B" Function Selector - Amps, Observe the meter pointer movement, If it is below the "O +'at the left hand side of the meter scale, polarity is correct. If it is above the "O", shut off the engine and reverse the "3fip on" connections at the shunt. Be careful not to let pliers or shunt touch ground when reversing these connections. 10. Perform the charging system test procedure as described in your vehicle service manual. Switch the Function and Range Selectors to obtain other + t Red clip * positive (+) Black clip - negative (-) ground • To measure voltage on the 3.2 volt scale: Function Selector - Dwell/Points • • • Range Selector - Points/Low Volts Green clip + positive (+) Black clip - Negative (-) ground 2. NOTE The voltmeter functions of this instrument can be used anywhere the vehicle service manual calls for voltage measurement except in those applications which call for 10 Megohm input impedance or a digital voltmeter. i,,,,.,, ' IGNITION SYSTEM TESTS 1. Primary Coil Voltage (a) if the engine cranks normally, but does not start, a low voltage (or no voltage) may be measured at the coil primary (+ terminal), Look for poor (or no) connection to the ignition Switch, wiring harness, or (bulkhead) connectors, (b) If the engine starts, but dies immediately upon releasing the key, the ballast resistor may beopen (or changed value). A fqll explanation for troubleshooting this problem will be found in your vehicfe service manual. 2, Breaker Point Resistance Test (Breaker Point Systems Only), Visually check the breaker point and associated wiring and connections. Check to see that the lead from the distributor to the Negative (+) terminal of the ignition cotl is not damaged (nicked insulation etc.), Remove the distributor cap and inspect the breaker points, Properly adjusted breaker points become light gray in color in normal use. If they are blued, blackened or pitted, they have exceeded their normal _ife, (a) To prevent the engine from starting, disable the ignition system by grounding the coil tower wire as shown below. ENGINE GROUND Disabling Breaker Point Ct_t Procedure, Ignllion System IDC 4 to) L;onnect [ne analyzer to the vehicle as shown in Figures 1 and 4. (c) Function Selector - Dwell/Points (d) Range Selector - Points/Low Volts (e) It dwelt is within specification no adjustment is necessary. ,, There is a direct relationship between dwell end timing. However, it is onlya one way relationship.If you change the dwell angle of the breaker points, you will automatically change the ignition timing. Changing the timing, though, has no effect on the dwell angle. FOR THIS REASON, IT tS IMPORTANT TO RE-CHECK THE TIMING WHENEVER THE DWELL ANGLE HAS BEEN ADJUSTED. When testing a vehicle with dual points, alternately block one set of points open with a piece of insulating material while the other set is being tested. , Dwell Test And Adjustment (Breaker Point Systems Only or Transistorized Systems which Use Breaker Points). Before performing the DWELL TEST AND ADJUSTMENT PROCEDURE, read the vehicle emission control label or the vehicle service manual to determine what should be done with the vacuum hoses connected to the distributor and the various advance/ retard solenoids. Most often, the vacuum hose must be disconnected from the distributor and the end plugged with a plastic golf "tee" or other plug. (a) Connect the analyzer to the vehicle as shown in Figures 1 and 4. (b) Function Selector - Dwell/Points (c) Range Selector - Dwell (d) Start the engine and allow it to warm up (upper radiator hose hot), Operate the #ngine at curb idle OR the RPM specified by the vehicle emission control label or the vehicle service manual for measuring dwell. Check the RPM by switching the FUNCTION SELECTOR to, the appropriate RPM position to match the vehicle engine under test, Return the Function Selector to Dwell and observe the correct dwell scale. ,, NOTE NOTE (e) Turn the ignition key to the ON position. If the meter reads OPEN on the points scale, crank the engine a fraction of a revolution at a time until the meter reads in the left hand area of the scale. (f) The points are now closed. A reading in the OK zone of the points scale indJ* cares that the breaker points and associated wiring are in good condition. The Analyzer may indicate high point resistance on a new set of points until they have been run tn the vehicle for a few miles and have been properly seated. This condition may be ignored as long as any defects discovered during the previous visual check have been corrected. (g) A reading in the BAD zone of the points scale may indicate defective points or any of the following faults may exist: • Poor distributor ground • Poor connection on the primary lead from the distributor to the ignition coil = Defective distributor pigtail lead = Misaligned points • Poor points/plate ground inside distributor Correct the defect and repeat the test, ........ DWELL ADJUSTMENT CONVENTIONAL BREAKER POINT SYSTEMS On GM distributors with a small metal slide cover, lift the cover and insert a W' Allen wrench in the adjusting screw socket and adjust the dwell by turning the wrench, as shown in Figure 14. i .... ,,,,, , WINDOW I18" ALLEN WRENCH ADJUSTMENT SCREW ., Ii TYPICAL GENERAL MOTORS BREAKER-POINTS DISTRIBUTOR FIGURE !4 On Ford, Chrysler, American Motors and other distributors not equipped with a small metal access slide cover, perform the following steps while referring to Figure 15, 1. Remove coi! wire from center tower of distributor cap and ground the wire bY connecting the loose end to the engine or frame. 2. Remove the distributor cap and rotor. 3. Connect a remote starter switch to the vehicle or have an assistant crank the engine for you, 4. With ignition switch ON and engine cranking observe reading on the Dwell scale. 5. To adjust Dwelt, loosen the locking screw slightlyand adjust the point gap with a feeler gauge according to the procedure outlined in the vehicle service manual. After adjustment, tighten lOcking screw, and recheck dwell while cranking engine. Repeat procedure if necessary. (Figure 15), Getector a5 follows: 6. Reassemble distributorand recheckdwellreading withengineoperating atidlespeed. Repeat steps5 and6if necessary. A. For RPM measurement, * Function Selector - RPM (4, 6, or 8 cylinder match the engine under test) e Range Selector- 0-1200 for idle RPM 0-6000 for High RPM B, 3, to For MiC So{enoid dwell measurement, Function Selector- Dwell/Points Range Selector - Dwell Follow the test procedures as outlined service manual, in your vehicle AU Slotted Hole Locking Screw- Dwelt Ad (All except IDelco*Remy Sliding Window Dislrlbutors) FIGURE 15 DWELL VARIATION TEST Follow . 2. the introductory paragraph and Steps a, through c, of Dwell Test and Adjustment, page 8. Start the engine and increase the engine speed from idle to about 1500 RPM and note the dwelt angle. Return the engine speed to idle and again note the dwell angle; If the difference between the two dwetl angle readings is more than 3 degrees, check for excessive wear in the breaker point plate and coup s ILngs or excessive wear in the distributor and bushings. shaft gear FUEL SYSTEM TESTS General Motors C-3 (Computer Command Control) Mixture Control Solenoid Dwelt(Carburetor equipped vehiclesonly), The G M C-3 system controls Air/Fue! ratio with a mixture control solenoid in the carburetor, The basic system performance check of this systemrequireschecking the duty cycle or"dwell" of the M/C solenoid, Note that regardless of the number of cylinders in the engine, the "dwell" reading is always read on the 6 cylinder dwell scale. , Connect the analyzer to the vehicle as shown in Figures 1,7, 8, 9, and 11. Note that the Green Clip wili have to be moved from the RPM connection point (Figures 7, 8. and 9) to the MiC Solenoid connector (Figure 11) during the test procedure when either RPM or Dwell measurement iSspecified. It will also be ENGINE RPM MEASUREMENT 1, Connect the analyzer to the vehicle as shown in Figures 1, and 3 through 10. 2. Function Selector - 4, 6, or 8 cylinder RPM position tO match the vehicle under test. 3. Range Selector - 0-1200 or 0-6000 depending on the engine speed to be measured. 4. Carburetor Adjustments _ There are several adjustments which should be checked as part of a per= formance tuneup, Those which require engine RPM monitoring are: = Curb idle • E_aseIdle • Solenoid controlled Idle • Fast Idle Your vehicle will likely have some combination of these adjustments, Proper adjustment of these settings isa requirement for gOodengine performance and drivability. 5. Fuel tnjection Adjustments - Some fuel injection systems have a minimum and maximum authority adjustment which should be checked during routine performance tuneup or whenever idle problems are encountered, 6, Miscellaneous Engine Tests - Many of the test procedures in your vehicle service manual require the engine to run at a specific RPM during the test. Your instrument provides excellent monitoring capabilities for this purpose, [ ............. KEY NO. .... PART NO. DESCRIPTION J, , ,, , ,,,,,j,, , ,,i ...... 1 2 i000-252 38-728 Ampere shunt 3 4 38-729 Cable Assembly, Green Clip 400-861 Case, bottom 5 270-117 Screw, Case Self-tap. #6-20 x 1" 6 38-727 7 8 !-1065 210-105 Cable Assembly, Switch Decal 9 10 290-102 Nut -Hex. 3/8-32 450-128 Knob-Selector 450-133 Cap, Glamour Meter Decal 11 _ 12 i3 1-1064 400-859 14 1000-425 , Cable Assembly, Ampere shunt Red and Black clip Flat Washer 3/8 I.D, Window (Glass) Ignition Adapter Kit Instruction Manual (not illustrated) 2-168302 10 II [ IIII I I IIIIIIIIII I[ ................... II II I I IIIIIIIIIIIIIIII I III IIIlI ENGINE ANALYZER owners manual Now that you have purchased your ENGINE ANALYZERt should a need ever exist for repair parts or servicer simply contact any Sears, Roebuck and Co. stores. Be sure to provide all pertinent facts when you call or visit. The model number of your ENGINE ANALYZER can be found on the front of the instrument. MODEL NO. 161.216300 WHEN GtVE TO ORDER REPAIR THE PART • MODEL order Repair l III I1_111111111111 NUMBER listed Center may and most PARTS, ALWAYS INFORMATION' • PART DESCRIPTION • NAME be ordered OF ITEM from any Sears Sears stores, PARTS if the [I III NUMBER parts Service REPAIR FOLLOWING • All HOW ORDERING ...... parts you will need are not be electronically Parts Distribution stocked locally, transmitted to Center for handling. ..... I II II I Illll iillll I Ill II li II ........ your a Sears I L
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