Information)
2. Incorrect fuel mixture.
2. (Refer to Appropriate
Diagnostic Information)
3. Intake manifold leakage.
3. Inspect intake manifold,
manifold gasket, and vacuum
hoses.
4. Faulty ignition coil(s).
4. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
ENGINE LOSS OF POWER
1. Dirty or incorrectly gapped
plugs.
1. Clean plugs and set gap.
2. Contamination in fuel system.
2. Clean system and replace fuel
filter.
3. Faulty fuel pump.
3. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
4. Incorrect valve timing.
4. Correct valve timing.
5. Leaking cylinder head gasket.
5. Replace cylinder head gasket.
6. Low compression.
6. Test compression of each
cylinder.
7. Burned, warped, or pitted
valves.
7. Replace valves.
8. Plugged or restricted exhaust
system.
8. Perform exhaust restriction test.
Refer to
Exhaust System -
Diagnosis and Testing
. Install
new parts, as necessary.
9. Faulty ignition coil(s).
9. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
ENGINE MISSES ON
ACCELERATION
1. Dirty or incorrectly gapped
spark plugs.
1. Clean spark plugs and set gap.
2. Contamination in Fuel System. 2. Clean fuel system and replace
fuel filter.
3. Burned, warped, or pitted
valves.
3. Replace valves.
4. Faulty ignition coil(s).
4. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
ENGINE MISSES AT HIGH
SPEED
1. Dirty or incorrect spark plug
gap.
1. Clean spark plugs and set gap.
2. Faulty ignition coil(s).
2. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
3. Dirty fuel injector(s).
3. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
2010 Jeep Wrangler Sport
2010 ENGINE 3.8L - Service Information - Wrangler
viernes, 1 de octubre de 2021 05:18:29 p. m.
Page 3
© 2011 Mitchell Repair Information Company, LLC.
