Stalls at Idle, Deceleration

Engine stalls at stops and on deceleration.

POSSIBLE CAUSE ACTION


Idle speed too low Perform minimum Airflow test.
SEE Powertrain Management/Computers and Control Systems/Testing and Inspection/Procedures.

Incorrect initial timing Check base timing.
SEE Ignition System/ ADJUSTMENT PROCEDURES.

Check CAM timing.

Incorrect spark advance Check spark controls.
SEE Ignition System/ TIMING SPECIFICATIONS

EGR malfunction Check EGR system.
Testing and Inspection

Restricted exhaust system Check Catalytic Converter.
See Plugged or Restricted Exhaust Testing.

Poor or contaminated fuel Recommend higher grade fuel

Vacuum leak Check vacuum lines and routing.
Refer to Vehicle Emission Control Information (VECI) label under hood.

Check intake manifold
and vacuum components