Engine overheatingCheck cooling system, See
COOLING
Auto. Trans. pressure regulator valve faultyReplace pressure regulator
va l ve
Auto. Trans. fluid level too lowAdd fluid as necessary
Improper vacuum diverter valve operationReplace vacuum diverter valve
Vacuum leaksInspect vacuum system and
repair as required
Leaking piston ringsReplace piston rings, See
ENGINES
Faulty High Speed Operation
Low fuel pump volumeReplace fuel pump
Le a kin g va l ve s o r wo r nReplace valves and/or springs,
See ENGINES
Incorrect valve timingReset valve timing,See
ENGINES
In t ake man ifo l d rest rict edRemove restriction
Worn distributor shaftReplace distributor
Faulty Acceleration
Improper fuel pump strokeRemove pump and reset pump
stroke
Incorrect ignition timingReset ignition timing, See
TUNE-UP
Le a kin g va l ve sReplace valves, See ENGINES
Worn fuel pump diaphragm or pistonReplace diaphragm or piston
In t ake Backfire
Improper ignition timingReset ignition timing, See
TUNE-UP
Faulty accelerator pump dischargeReplace accelerator pump
Improper choke operationCheck choke and adjust as
required
Defective EGR valveReplace EGR valve
Fuel mixture too leanReset air/fuel mixture, See
TUNE-UP
Choke valve initial clearance too largeReset choke valve initial
clearance
Exhaust Backfire
Vacuum leakInspect and repair vacuum
system
Faulty vacuum diverter valveReplace vacuum diverter valve
Faulty choke operationCheck choke and adjust as
required
Exhaust system leakrepair exhaust system leak
Engine Detonation
Ignition timing too far advancedReset ignition timing, See
TUNE-UP
Faulty ignition systemCheck ignition timing, See
TUNE-UP
Spark plugs loose or faultyRetighten or replace plugs
Fuel delivery system cloggedInspect lines, pump and filter
fo r cl o g
EGR valve inoperativeReplace EGR valve
PCV system inoperativeInspect and/or replace hoses
or valve
Vacuum leaksCheck vacuum system and
repair leaks
Excessive combustion chamber depositsRemove built-up deposits
Leaking, sticking or broken valvesInspect and/or replace valves
External Oil Leakage
Fuel pump improperly seated or worn gasketRemove pump, replace gasket
and seat properly
Oil pan gasket broken or pan bentStraighten pan and replace
ga ske t
Timing chain cover gasket brokenReplace timing chain cover
ga ske t
Rear main oil seal wornReplace rear main oil seal
Oil pan drain plug not seated properlyRemove and reinstall drain
plug
Camshaft bearing drain hole blockedRemove restriction
Oil pressure sending switch leakingRemove and reinstall sending
switch
Excessive Oil Consumption
Worn valve stems or guidesReplace stems or guides, See
Page 10 of 36 MITCHELL 1 ARTICLE - GENERAL INFORMATION Trouble Shooting - Basic Procedures
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B9B990D68%2D660A%2D45E9%2D8F46%2DE
...
ENGINES
Valve "O" ring seals damagedReplace "O" ring seals, See
ENGINES
Plugged oil drain back holesRemove restrictions
Improper PCV valve operationReplace PCV valve
Engine oil level too highRemove excess oil
Engine oil too thinReplace thicker oil
Valve stem oil deflectors damagedReplace oil deflectors
Incorrect piston ringsReplace piston rings, See
ENGINES
Piston ring gaps not staggeredReinstall piston rings, See
ENGINES
Insufficient piston ring tensionReplace rings, See ENGINES
Piston ring grooves or oil returnslots clogged Replace piston
rings, See ENGINES
Piston rings sticking in groovesReplace piston rings, See
ENGINES
Piston ring grooves excessively wornReplace piston and rings, See
ENGINES
Compression rings installed upside downReplace compression rings
correctly, See ENGINES
Worn or scored cylinder wallsRebore cylinders or replace
block
Mismatched oil ring expander and railReplace oil ring expander and
rail, See ENGINES
Intake gasket dowels too longReplace intake gasket dowels
Excessive main or connecting rod bearing clearanceReplace main or connecting
rod bearings, See ENGINES
No Oil Pressure
Low oil levelAdd oil to proper level
Oil pressure sender or gauge brokenReplace sender or gauge
Oil pump malfunctionRemove and overhaul oil
pump, See ENGINES
Oil pressure relief valve stickingR e mo ve a n d r e in st a l l va l ve
Oil pump passages blockedOverhaul oil pump, See
ENGINES
Oil pickup screen or tube blockedRemove restriction
Loose oil inlet tubeTighten oil inlet tube
Loose camshaft bearingsReplace camshaft bearings,
See ENGINES
Internal leakage at oil passagesReplace block or cylinder
head
Low Oil Pressure
Low engine oil levelAdd oil to proper level
Engine oil too thinRemove and replace with
thicker oil
Excessive oil pump clearanceReduce oil pump clearance,
See ENGINES
Oil pickup tube or screen blockedRemove restrictions
Main, rod or cam bearing clearance excessiveReplace bearing to reduce
clearance, See ENGINES
High Oil Pressure
Improper grade of oilReplace with proper oil
Oil pressure relief valve stuck closedEliminate binding
Oil pressure sender or gauge faultyReplace sender or gauge
Noisy Main Bearings
Inadequate oil supplyCheck oil delivery to main
bearings
Excessive main bearing clearanceReplace main bearings, See
ENGINES
Excessive crankshaft end playReplace crankshaft, See
ENGINES
Loose flywheel or torque converterTighten attaching bolts
Loose or damaged vibration damperTighten or replace vibration
damper
Crankshaft journals out-of-roundRe-grind crankshaft journals
Excessive belt tensionLoosen belt tension
Noisy Connecting Rods
Excessive bearing clearance or missing bearingReplace bearing, See
ENGINES
Crankshaft rod journal out-of-roundRe-grind crankshaft journal
Misaligned connecting rod or capRemove rod or cap and realign
Incorrectly tightened rod boltsRemove and re-tighten rod
Page 11 of 36 MITCHELL 1 ARTICLE - GENERAL INFORMATION Trouble Shooting - Basic Procedures
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B9B990D68%2D660A%2D45E9%2D8F46%2DE
...
