Stalls at Idle, Deceleration

Engine stalls at stops and on deceleration.

POSSIBLE CAUSE ACTION


EGR valve loose or sticking 1. Check the EGR system under TESTING
plunger, flange gasket leaking, PROCEDURES. If OK, step 2
solenoid and thermal valves 2. Check the EGR electronic controls.
malfunctioning Refer to COMPUTERIZED ENGINE CONTROLS.




Ignition timing Check the Ignition Timing under
ADJUSTMENT PROCEDURES.



Restricted exhaust system Check the Catalytic Converter under
TESTING PROCEDURES.



Idle speed too low 1. Check and adjust the idle speed under
ADJUSTMENT PROCEDURES.
2. Check the operation of all idle speed
control devices



Vacuum leak 1. Inspect vacuum hoses for proper
routing and damage.
2. Check the intake manifold area