Chrysler 1998 Voyager Service Manual page 1060

9 - 10 ENGINE
DIAGNOSIS AND TESTING (Continued)
ENGINE DIAGNOSIS—PERFORMANCE
CONDITION
ENGINE WILL NOT START
ENGINE STALLS OR IDLES
ROUGH
ENGINE LOSS OF POWER
POSSIBLE CAUSE
1. Weak battery.
2. Corroded or loose battery
connections.
3. Faulty starter.
4. Moisture on ignition wires.
5. Faulty ignition cables.
6. Faulty coil or control unit.
7. Incorrect spark plug gap.
8. Contamination in fuel system.
9. Faulty fuel pump.
1. Idle speed too low.
2. Incorrect fuel mixture.
3. Intake manifold leakage.
4. Incorrect ignition wiring.
5. Faulty coil(s)
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 cables.
10. Faulty coil(s).
CORRECTION
1. Test battery. Charge or replace
as necessary.Refer to Group 8A,
Battery.
2. Clean and tighten battery
connections. Apply a coat of light
mineral grease to terminals.
Test starting system. Refer to Group
8B, Starting.
4. Remove moisture from wires.
5. Replace any cracked or shorted
cables.
6. Test and replace as needed.
Refer to Group 8D, Ignition System
7. Set gap. Refer to Group 8D,
Ignition System.
8. Clean system and replace fuel
filter.
9. Test fuel pump and replace as
needed. Refer to Group 14, Fuel
System.
1. Test minimum air flow. Refer to
Group 14, Fuel System.
2. Refer to Group 14, Fuel System.
3. Inspect intake manifold, manifold
gasket, and vacuum hoses. Refer to
Group 11, Exhaust System and
Intake Manifold.
4. Install correct wiring.
5. Test and replace as necessary.
Refer to Group 8D, Ignition System.
1. Clean plugs and set gap. Refer to
Group 8D, Ignition System.
2. Clean system and replace fuel
filter.
3. Test and replace as necessary.
Refer to Group 14, Fuel System.
4. Correct valve timing.
5. Replace cylinder head gasket.
6. Test compression of each
cylinder.
7. Replace valves.
8. Install new parts, as necessary.
9. Replace any cracked or shorted
cables.
10. Test and replace as necessary.
Refer to Group 8D, Ignition System.
NS