Dodge 2001 Ram 1500 Owner's Manual page 1267

9 - 120 ENGINE 5.9L
ENGINE 5.9L (Continued)
CONDITION
ENGINE MISSES ON
ACCELERATION
DIAGNOSIS AND TESTING— MECHANICAL
CONDITION
NOISY VALVES/LIFTERS
POSSIBLE CAUSES
7. Intake manifold vacuum leak
1. Worn or incorrectly gapped spark
plugs
2. Spark plug cables defective or
crossed
3. Dirt in fuel system
4. Burned, warped or pitted valves
5. Faulty coil
ENGINE MECHANICAL DIAGNOSIS CHART
POSSIBLE CAUSES
1. High or low oil level in crankcase
2. Thin or diluted oil
3. Low oil pressure
4. Dirt in tappets/lash adjusters
5. Bent push rod(s)
6. Worn rocker arms
7. Worn tappets/lash adjusters
8. Worn valve guides
9. Excessive runout of valve seats
or valve faces
CORRECTION
7. Inspect intake manifold gasket
and vacuum hoses (Refer to 9 -
ENGINE/MANIFOLDS/INTAKE
MANIFOLD - DIAGNOSIS AND
TESTING).
1. Replace spark plugs or clean and
set gap. (Refer to 8 - ELECTRICAL/
IGNITION CONTROL/SPARK PLUG
- CLEANING)
2. Replace or rewire secondary
ignition cables. (Refer to 8 -
ELECTRICAL/IGNITION CONTROL/
SPARK PLUG CABLE - REMOVAL)
3. Clean fuel system
4. Install new valves
5. Test and replace as necessary
(Refer to 8 - ELECTRICAL/
IGNITION CONTROL/IGNITION
COIL - REMOVAL)
CORRECTION
1. Check for correct oil level. Adjust
oil level by draining or adding as
needed
2. Change oil. (Refer to 9 -
ENGINE/LUBRICATION/OIL -
STANDARD PROCEDURE)
3. Check engine oil level. If ok,
Perform oil pressure test. (Refer to
9 - ENGINE/LUBRICATION -
DIAGNOSIS AND TESTING) for
engine oil pressure test/
specifications
4. Clean/replace hydraulic
tappets/lash adjusters
5. Install new push rods
6. Inspect oil supply to rocker arms
and replace worn arms as needed
7. Install new hydraulic tappets/lash
adjusters
8. Inspect all valve guides and
replace as necessary
9. Grind valves and seats
BR/BE