Dodge 2001 Ram 1500 Owner's Manual page 1320

BR/BE
ENGINE 8.0L (Continued)
DIAGNOSIS AND TESTING—ENGINE
DIAGNOSIS - INTRODUCTION
Engine diagnosis is helpful in determining the
causes of malfunctions not detected and remedied by
routine maintenance.
These malfunctions may be classified as either
mechanical (e.g., a strange noise), or performance
(e.g., engine idles rough and stalls).
(Refer to 9 - ENGINE - DIAGNOSIS AND TEST-
ING - Preformance) or (Refer to 9 - ENGINE - DIAG-
NOSIS AND TESTING - Mechanical). Refer to 14 -
FUEL SYSTEM for fuel system diagnosis.
DIAGNOSIS AND TESTING—PERFORMANCE
PERFORMANCE DIAGNOSIS CHART—GASOLINE ENGINES
CONDITION
ENGINE WILL NOT CRANK
ENGINE CRANKS BUT WILL NOT
START
Additional tests and diagnostic procedures may be
necessary for specific engine malfunctions that can-
not be isolated with the Service Diagnosis charts.
Information concerning additional tests and diagno-
sis is provided within the following:
• Cylinder Compression Pressure Test
• Cylinder Combustion Pressure Leakage Test
• Cylinder Head Gasket Failure Diagnosis
• Intake Manifold Leakage Diagnosis
• Lash Adjuster (Tappet) Noise Diagnosis
• Engine Oil Leak Inspection
POSSIBLE CAUSES
1. Weak or dead battery
2. Corroded or loose battery
connections
3. Faulty starter or related circuit(s)
4. Seized accessory drive component
5. Engine internal mechanical failure
or hydro-static lock
1. No spark
2. No fuel
3. Low or no engine compression
ENGINE 8.0L
CORRECTION
1. Charge/Replace Battery. (Refer to 8
- ELECTRICAL/BATTERY SYSTEM/
BATTERY - STANDARD
PROCEDURE). Check charging
system. (Refer to 8 - ELECTRICAL/
CHARGING - DIAGNOSIS AND
TESTING).
2. Clean/tighten suspect battery/
starter connections
3. Check starting system. (Refer to 8 -
ELECTRICAL/STARTING -
DIAGNOSIS AND TESTING)
4. Remove accessory drive belt and
attempt to start engine. If engine
starts, repair/replace seized
component.
5. Refer to (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
1. Check for spark. (Refer to 8 -
ELECTRICAL/IGNITION CONTROL -
DESCRIPTION)
2. Perform fuel pressure test, and if
necessary, inspect fuel injector(s) and
driver circuits. (Refer to 14 - FUEL
SYSTEM/FUEL DELIVERY/FUEL
PUMP - DIAGNOSIS AND TESTING).
3. Perform cylinder compression
pressure test. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
9 - 173