1990 Pontiac Sunbird Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Pontiac Sunbird

1990 Pontiac Sunbird Problems

Torque Converter Clutch Can Stick After Extended Freeway Driving

The torque converter clutch can stick "on" after extended freeway driving causing the engine to stall when coming to a stop. Our technicians tell us when this occurs, the engine usually will restart and stall when put into gear. After allowing about twenty minutes for the engine and transmission to cool down, the engine will start and the transmission will operate normally. Replacing the torque converter clutch solenoid, transmission filter, and fluid will generally correct this issue.

Car Won't Start Due to Ignition Coil/Crankshaft Position Sensor Failure

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.

Leaking Water Pump May Cause Coolant Loss and Overheating

A coolant leak may develop from the water pump. The engine may overheat as a result of the coolant loss. A leaking water pump should be replaced.

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1990 Pontiac Sunbird Questions

EGR receiving vacuum at low rpm's and on acceleration (2 answers)

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 runs rough, won't idle after warm(in park or drive) (1 answer)

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...

where is the gas sensor located (2 answers)

car will not stay running

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1990 Pontiac Sunbird Reviews

This car is cheap and dependable, but VERY SLOW. It feels like a heavier car in hard cornering. Mine had a single overhead cam 2.0L I4, 3 speed automatic. I don't see how a V6 could improve this car at all.

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