Stalls at Idle, Deceleration

Engine stalls at stops and on deceleration.

POSSIBLE CAUSE ACTION


EGR valve always open,
or gasket leaking See Exhaust Gas Recirculation


Ignition timing incorrect Check ignition timing.
See Adjustments.


Restricted exhaust system See Catalytic Converter


Base idle speed too low Check idle speed.
See Adjustments.


Idle speed control valve defective Refer to Computers and
Control Systems


Unmeasured air (vacuum leaks) Inspect air flow meter,
vacuum hoses, intake air ducts
and manifold.
Refer to Fuel Delivery and Air Induction.


Evaporative system malfunction or leak See Evaporative Emissions Systemm


PCV system clogged, restricted or leaking See Positive Crankcase Ventilation