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•
Cylinder mechanical lock (timing incorrect;
valve/piston contact)
Insufficient rpm
•
Low battery power
•
Starter motor problem
•
Incorrect oil viscosity
•
Cold temperature
Insufficient oil pressure
•
Oil gauge error on instrument panel (will not cause
hard start or no start)
•
Low oil level: oil leak, oil consumption, or incorrect
servicing
•
High oil level: incorrect servicing, fuel in oil,
coolant in oil
•
Incorrect oil viscosity
•
Stuck oil pressure regulator
•
Scored or damaged oil pump/front cover
•
Engine Oil Pressure (EOP) sensor biased
•
Incorrect EOP sensor
•
EOP circuit or sensor problems
•
Broken, missing, or loose piston cooling tubes
•
Missing, damaged, or worn bearing inserts
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
5 HARD START AND NO START DIAGNOSTICS
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
•
Missing, damaged, or worn camshaft bushings
•
Lifter missing (will also have performance
problems)
Excessive exhaust smoke with hard start or no
start concern
•
Poor fuel quality
•
Insufficient cylinder temperature
•
Loose injector
•
Low compression
•
Inoperable inlet air heater system – if equipped
•
Excessive air inlet or exhaust restriction
•
Damaged injector – split tip
•
Base engine timing incorrect
•
Combustion leak to fuel
No exhaust smoke / cylinders not receiving fuel
•
Fuel supply system concern
•
ECM and IDM communication failure
•
ICP sensor bias high (above 3.45 MPa [500 psi])
•
Combustion leak to fuel supply (fuel rail)
•
Base engine timing incorrect
EGES-270-1
147
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