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what would make a 1990 chevy celebrity cut off when coming ...
Sent to Car Experts January 31 02:00 PM

what would make a 1990 chevy celebrity cut off when coming to a stop ,and when it doesnt cut off, the engine surges, almost taking off if the brakes arent held hard enough?

Optional Information:
1990 Chevrolet celebrity 3.1l v6

Already Tried:
replaced belts, plugs/wires, about to replace fuel filter

Customer (name blocked for privacy)
Status:  Closed   Value: $8
Answer
January 31 2:17 PM (16 minutes and 26 seconds later)
         
ACCEPTEDCheck Mark

It could be a number of things.

Fuel pressure

Mass air flow sensor

Throttle position sensor

Idle air valve

Idle speed control accutuator

Idle stop selinoid

Electronic spark control module.

Try this and see if you get any codes.

To extract a trouble from the computer for diagnostic purposes, the Assembly Line Communication Link (ALDL) connector is used.

Ground terminals A and B with the ignition "ON" and engine not running. The system will enter the diagnostic mode. In this mode, the computer will display a 12, three consecutive times, by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" or light. A 12 consists of one flash, a short pause, then two flashes in rapid succession.

After 12 is displayed, any stored trouble s will be displayed by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" light. All s are displayed 3 times each then a 12 will repeat. In the diagnostic mode, the computer will also energize all computer controlled relays and solenoids.

ALDL Connector (Located Underdash)

Hope this helps, if so please accept.



If more information is needed, please ask me.

Hope this helps, an accept would be appreciated.
Firsthogman
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Firsthogman -- Auto Service Technician96% Positive Feedback on 298 Car Accepts
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