Stalls at Idle, Deceleration

Engine stalls at stops and on deceleration.

POSSIBLE CAUSE ACTION



EGR malfunction ^ Check EGR system, Exhaust Gas Recirculation


Excessive spark retard ^ Check Spark Controls,


Restricted exhaust system ^ Check Catalytic Converter, Catalytic Converter


Idle speed too low ^ ^ Check operation of Idle Air Control (IAC) motor,


Vacuum leak ^ Inspect vacuum hoses for routing and damaged lines, SEE Diagrams/Vacuum and Vapor Hose

^ Check intake manifold and vacuum components


Poor or contaminated fuel ^ Recommend higher grade fuel