Engine Diagnosis-Performance; W I L L N O T Start - Chrysler 1998 Viper RT/10 Owner's Manual

S R
D I A G N O S I S A N D T E S T I N G ( C o n t i n u e d )
ENGINE DIAGNOSIS—PERFORMANCE
ENGINE 9 - 7
C O N D I T I O N
P O S S I B L E C A U S E S
C O R R E C T I O N
E N G I N E WILL N O T
C R A N K
1. W e a k or discharged battery.
2. Corroded or loose battery
connections.
3. Faulty starter or related circuits.
4. Seized accessory drive
component.
5. Engine internal mechanical
failure or hydrostatic lock.
1. Charge or replace battery as necessary.
Refer to Group 8A, Battery. Check charging
system. Refer to Group 8C, Charging S y s t e m .
2. Clean/tighten battery/starter connections.
3. Check starting system. Refer to Group 8 B ,
Starting for procedures.
4. Remove accessory drive belt a n d attempt to
start engine. If engine cranks, repair/replace
seized component.
5. Refer to Group 9, Engine for procedures.
E N G I N E C R A N K S BUT
W I L L N O T START
1. No spark.
2. No fuel.
3. Low or no engine compression.
1. Check for spark. Refer to Group 8 D , Ignition
System for procedure.
2. Perform fuel pressure test. Refer to Group
14, Fuel System for procedure.
3. Perform cylinder compression test. Refer to
Group 9, Engine for procedure.
E N G I N E LOSS O F
P O W E R
1. Worn or incorrect g a p p e d spark
plugs.
2. Dirt or water in fuel system.
3. Faulty fuel p u m p .
4. Incorrect valve timing.
5. Blown cylinder head gasket(s).
6. Low compression.
7. Burned, w a r p e d , or pitted valves.
8. Plugged or restricted exhaust.
9. Faulty ignition cables.
10. Faulty coil(s).
1. Replace spark plugs or set gap. Refer to
Group 8D, Ignition System.
2. Clean system and replace fuel filter.
3. Replace fuel p u m p .
4. Correct valve timing.
5. Replace cylinder head gasket(s).
6. Test cylinder compression.
7. Install new or reface valves as necessary.
8. Replace parts as necessary.
9. Replace ignition cables as necessary.
10. Test and replace as necessary. Refer to
Group 8 D , Ignition System.
ENGINE STALLS O R
R O U G H IDLE
1. Carbon buildup on throttle
plate(s).
2. Engine idle speed too low.
3. Worn or incorrectly gapped
spark plugs.
4. Faulty or crossed ignition cables.
5. Faulty coil(s).
6. Intake manifold v a c u u m leak.
1. Remove throttle body(s) and de-carbon. Refer
to Group 14, Fuel System for procedure.
2. Check Idle Air Control circuit. Refer to Group
14, Fuel System for procedure.
3. Replace spark plugs or set gap. Refer to
Group 8 D , Ignition System.
4. Check for correct firing order or replace
ignition cables as necessary. Refer to Group 8D,
Ignition System for procedure.
5. Test and replace as necessary. Refer to
Group 8 D , Ignition System.
6. Inspect intake manifold gasket a n d vacuum
hoses. Replace as necessary. Refer to Group
11, Exhaust System and Intake Manifold for
procedure.
ENGINE M I S S E S O N
A C C E L E R A T I O N
1. Worn or incorrectly gapped
spark plugs.
2. Faulty ignition cables.
3. Dirt or water in fuel system.
4. Burned, w a r p e d , or pitted valves.
5. Faulty coil(s).
1. Replace spark plugs or set gap. Refer to
Group 8 D , Ignition System.
2. Replace ignition cables as necessary.
3. Clean system and replace fuel filter.
4. Install new or reface valves as necessary.
5. Test and replace as necessary. Refer to
Group 8 D , Ignition System.