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Troubleshooting
Related Manuals for Jeep CJ-7 1984
Summary of Contents for Jeep CJ-7 1984
- Page 23 General Jeep CJ-7 I-6 Engine Information and Tune- Up Procedure...
- Page 26 liter (150 GID) engine and 4.2 liter (258 GID) six-cylinder valve engines. I.S. are designed for unleaded fuel. Both quench-typ e air/fuel mixture, which four-cylinder 1 through 4 from i s 1 The crankshaft rota t io is clockwise. the front of the rotates within five main rotates within four line-bored in the six-cylinder...
- Page 27 Required Recommended Tool Ref. Cover Alignment and J-22248 • Tool 1.5. Oil Pump Inlet Tube Installation Tool J-21882 II1II Valve Spring Removal and Installation Tool II1II • Case Cover Oil Seal Removal Tool Air Hose Adapter II1II Hydraulic Valve Tappet Removal and Installation Tool Dial Indicator Vibration...
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Page 29: Knock Sensor
ENGINES GENERAL SERVICE AND DIAGNOSIS EMISSION CONTROL COMPONENTS Emission Control Components .c"2 <.>� .:,r.E "0 .>< -=<1:1 <.> "t€ � � >� > 5iJ) � 0<1:1 &1- "0 (D� 1.5. <1:1 (D<Of (J)I > !II IDI'Il <.> > t> � >... - Page 30 SE l...
- Page 31 ENGINES GENERAL SERVICE AND DIAGNOSIS Service Diagnosis - Mechanical Condition Possible Cause Correction ( I) LEAKS ( I) Fuel pump gasket broken or EXTERNAL OIL Replace gasket. improperl y seated. Cyli der head cover RTV sealant Replace sealant inspect cylinder I.S.
- Page 32 (12) S EXTERNAL OIL loose or ea t camshaft as necessary. Distributor base ( I) Oit level too EXCESSIVE OIL oil to level. CONSUMPTION Oil with wron g used. PC:V valve s t u c k os e d. Valve stem oil deflectors (or valve stem oil deflectors.
- Page 33 Possible Refer to Oil Pressure Oil pump malfunction. Oil pressure relief oil pressure relief Oil passages on pressure side of pump oil passages for obstructions. te d obst screen or tube obstructed. for obstructions. tube. Loose oil inlet tube, or seal inlet LOW OIL PRESSURE Low oil level.
- Page 34 pressure rei HIGH OIL PRESSURE Oil pressure relief valve (J) Remove and closed. valve assemblV loS. for low MAIN BEARING NOISE ( I) oil level and low oil Insufficient oil pressure. (2) Measure (2) M main clearance. clearance excessive. as necessary. insen.
- Page 35 Possible i sto bro ken . PISTON NOISE Loose or seized piston c learance, ea r an side c learance. necessary. Carbon Remove carbon from excessive. VALVE ACTUATING ( I) ( I) Insufficient oil Check for: COMPONENT NOISE Low oil level. Push rods worn or bent.
- Page 36 Ser"ice DUaQfll o ltl--Mlechlilruca. Possible Cause Correction Condition (12) VALVE ACTUATING valve lock. Install valve lock. COMPONENT NOISE (13) Push rod Remove head and head. remove head. oil level Conect 80851F .. 11...
- Page 37 Possible (1 ) necc�"ary . . choke valve I.S. (2) Restricted choke vi..I c uum (:2) Clean pa"saf!c�. Iloa! level. level '-''' ncccs.�ary. needle valve nCl'c"sary, pump. fueJ fuel'pump. choke cover. Incorrect choke cover choke un loader. necessa ry . coil.
- Page 38 Possible Choke ROUGH IDLE Locate and eliminate blndlllig condition. STALLING C vacuum motor or valve. as necessary. J.S. into Air leak manifold vacuum. manifold vacuum connections as necessary. fuel level. fuel level . (II) distributor rotor or cap. (11) rotor or cap. necessary.
- Page 39 Possible Cause FAULTY (4) Worn or pump ACCELERATION (Continuctl) C�) carhurctor Ill a in cuver enid and Lhokc ,,-et too lean, choke cover. Test �eated valves. nece�sary. coil. (lO) ( 10) Test coil and as neccs:.. <.t ry. f ee d b ac k sy st e m ( II) Refer to Feedback FAULTY...
- Page 40 ENGINES GENERAL SERVICE AND DIAGNOSIS Diagnosis Performance (Continued) Service Condition Possible Cause Correction ( I n) Inl;l�l' m:lnifokl rc�trictt:'u. FAULTY H1GH (In) Remove rcstriction replacc manifold. SPEED (17) \\\)1"11 dl"lrihutnr �hart. ( 17) RcpliKC shaft. OPERATiON (Continued) ( 1 X) llllprl \j1l'l kcJhack �y�lcm opcration. (I�) Refcr to fccdback System Diagnosis.
- Page 41 Pussihle Cause POWER NOT Check va l v e TO NORMAL necessary. coil. Test coil and a� necessary. I.S. wires. wire� TC�1 as ncccs�ary. lv e (9) TCSI ne(:es�ary . (11) an d Test (12) distributor shaft. Worn (12) shaft. ( 13) R e f er to Feedback ( I)
- Page 42 Correction Condition P ossible Cause combustion PING OR Grind smooth. SPARK KNO C K Test EGR and rp'I"HSlr'&I Valve as necessary. SURGING (AT carburetor fuel level. fuel leveL TO TOP CRUISING fuel pump pressure volume. fuel pump. rod. flow. PCV valve air Test PCV valve and rer.la(�@ necessary.
- Page 43 SYSTEM CIRCUiT OPEN SPARK PLOG fiRES TRIGGER INCREASES. ZEfilO VOLTAQe 840 1 1...
- Page 44 with because fill as until recesses manu-...
- Page 46 I.S. Combustion Prellure Teat Di�lar1loail Possible Cause Condition Correction seated AIR ESCAPES Intake valve nol Refer to Valve Re<:onjciihc)nirlg THROUGH CAR· MOT. 2.46L MOT. 4,2l. BURETOR Exhaust valve not seated OrC)DerlV AIR ESCAPES Refer aJve Rec�On(11tl(miT112 ""'HROUGH TAILPIPE MOT. 2,46L 4.2L.
- Page 47 1.5. and f.ni.nas ar e...
- Page 48 60770...
- Page 49 cause...
- Page 50 I.s. is correct over 84 01 13...
- Page 51 rotor dis is no...
- Page 52 tower i t was towers. 83 13 2 R."J7...
- Page 53 84 01 15...
- Page 55 85054 vacuum vacuum...
- Page 56 loS. vacuum light remove...
- Page 57 manual trans-...
- Page 58 e vacuum hose Disconnect and plug vacuum vacuum vacuum...
- Page 59 &III �2I 1&120 11 �-i-+-+- -+-I- � � � ..I � .4 � � ..840118 ENGINE 24 r-+--I---t--+-+-+--+-... -i 20 r-+- -I- -+-t-+- -I- -+-+-+- -+- II:: " � VACUUM (IN. HO.) 84 01 19 vacuum...
- Page 61 Distributor Curvet ffiJ6 � � � 1.5. " <.:I 1 2 I---+-I- -+-+ VACUUM liN. ENGINE RPM 83084E 83084F...
- Page 62 ENGINES TUNE ... UP PROCEDURES TUNE-UP SPECIFICATIONS Tune-Up Specifications - On-Vehicle - Six-Cylinder Engine Initial Timing BTOC at Curb Idle Sol&-Vac S� S peed - 1600 RPM With Idle (.&.i.Jto. Vacuum Advance In Drive. Manual In Engl". Centrlfuga' Neutral) Vacuum OI.placement Hose OI�onnected (Auto.
- Page 63 as a...
- Page 64 ENGINES " PROCEDURES TUNE-UP Fast Idle Speed Adjustment Adjustment Four-Cylinder Engine Sole-Vac Curb Idle Speed Four-Cylinder Engine Adjust the fast idle ed with g i n normal operating temperature and the Connect a calibrated, e scale tach valve vacuum hose disconnected and plugged. ometer to the coil e (TACH) terminal.
- Page 65 B4639 vacuum source, vacuum to B-40...
- Page 66 vacuum source vacuum ac t uator. turn e vacuum hose connector. connector. nect , vacuum ac t uator. ac t uator.
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