Jeep KJ 2005 Service Manual page 1252

KJ
ENGINE - 2.4L (Continued)
CONDITION
ENGINE LOSS OF POWER
ENGINE MISSES ON ACCELERA-
TION
ENGINE MISSES AT HIGH SPEED
POSSIBLE CAUSE
1. Dirty or incorrectly gapped
plugs.
2. Contamination in fuel system.
3. Faulty fuel pump.
4. Incorrect valve timing.
5. Leaking cylinder head gasket.
6. Low compression.
7. Burned, warped, or pitted
valves.
8. Plugged or restricted exhaust
system.
9. Faulty ignition coil(s).
1. Dirty or incorrectly gapped spark
plugs.
2. Contamination in Fuel System.
3. Burned, warped, or pitted
valves.
4. Faulty ignition coil(s).
1. Dirty or incorrect spark plug
gap.
2. Faulty ignition coil(s).
3. Dirty fuel injector(s).
4. Contamination in fuel system.
ENGINE - 2.4L
CORRECTION
1. Clean plugs and set gap.
2. Clean system and replace fuel
filter.
3. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
4. Correct valve timing.
5. Replace cylinder head gasket.
6. Test compression of each cylin-
der.
7. Replace valves.
8. Perform exhaust restriction test.
(Refer to 11 - EXHAUST SYSTEM
- DIAGNOSIS AND TESTING)
Install new parts, as necessary.
9. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
1. Clean spark plugs and set gap.
2. Clean fuel system and replace
fuel filter.
3. Replace valves.
4. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
1. Clean spark plugs and set gap.
2. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
4. Clean system and replace fuel
filter.
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