Stalls at Idle, Deceleration

Engine stalls at stops and on deceleration.

POSSIBLE CAUSE ACTION


EGR valve loose or sticking Check EGR system. Refer to TESTING PROCEDURES.
plunger, flange gasket leaking,
solenoid and thermo valves
malfunctioning



Ignition timing Refer to COMPUTERS AND CONTROL SYSTEMS.


Restricted exhaust system Check Catalytic Converter. Refer to TESTING PROCEDURES.



Idle speed too low Refer to COMPUTERS AND CONTROL SYSTEMS.



Vacuum leak Inspect vacuum hoses for
routing and damaged lines
Check intake manifold area



PCV system clogged Check PCV system. Refer to TESTING PROCEDURES.