1990 Pontiac Sunbird Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Pontiac Sunbird
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1990 Pontiac Sunbird ProblemsStalling or Low Engine Idle Speed Due to Dirty Throttle Body
A dirty throttle body may cause a lower than normal engine idle resulting in a stalling condition. A stalling condition may also result if an idle learn procedure is not performed if the battery goes dead or is disconnected.
The ignition module or crankshaft position sensor may fail causing the engine to die and not restart. Diagnoses will be necessary to determine if the module or crank sensor is causing the no start condition.
The serpentine belt tensioner can fail; it may become noisy and/or the belt may jump off. Replacement of the failed tensioner will be necessary.
1990 Pontiac Sunbird Questions1990 Sunbird Le engine stalls when under losd unless I pump the gas. (2 answers)
I'm trying to find out what might cause the fuel injector in the throttle body to not give enough fuel occasionally when the engine is under load. Feathering the gas will keep it going sometime so I think it's fuel-related. Is there a fuel filter in the throttle body under the fuel inject...
did the egr test (snapped throttle and check if valve is open on deceleration)-chiltons) my EGR is open on acceleration and closes on deceleration? this is causing my car to idle rough and run rough under 2Krpm (anything below heavy acceleration)
1990 pontiac sunbird 2.0 Naturally aspirated, 2 door convertible, carbureted, automatic, 206K.
(PROM, ECM work no check engine code). Runs and drives fine first 30 min highway and most days around town. After 30 min (good and warm) it runs quite rough and won't hold an idle (or anything belo...