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1991 Geo Storm 1.6L Poor Idle Quality, Cuts out, IDLE MOTOR STAYS ON
Posted to GM Driveability on 3/20/2003 2 Replies

this is new to us! the car runs rough at times, but the stranger sympton is that the idle rpm goes all over the map and the idle air controll motor continues to run after the key is turned off. pulling the ecm stops the constant run of the i.a.c. ?????

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car Vehicle Data

1991 Geo Storm

VIN J81RS236IM
Engine1.6 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI / SEFI
SymptomsPoor Idle Quality, Cuts Out, Idle Motor Stays On
OccursAlways
Misc.Code 42 E.s.t.-Idle Air Motor Runs - Key Off

Trouble Codes

42e.s.t. circuit
Message Closed

car Vehicle Data

1991 Geo Storm

VIN J81RS236IM
Engine1.6 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI / SEFI
SymptomsPoor Idle Quality, Cuts Out, Idle Motor Stays On
OccursAlways
Misc.Code 42 E.s.t.-Idle Air Motor Runs - Key Off

Trouble Codes

42e.s.t. circuit