stalls when u accelerate, idles fine 5.7

Asked by Sep 04, 2013 at 06:18 PM about the 1990 Pontiac Firebird Formula

Question type: Maintenance & Repair

1990 firebird idles fine revs ok , go in drive sometimes wont accelerate - stalls . let go of throttle and runs good. changed tps and map. what I was told the fuel pump and filter were changed.

3 Answers

195

check the fuel pressure. If it's not ok, then check the fuel filter and/or fuel pump.

checked fuel pressure with key on on position it has about 44 / with motor running its at 33/34

325

Common problems on this vehicle are failures of the Coolant Fan Temperature Switch (VIN E TBI-V8 engine only), the Fuel Injectors (V6 engine only) and the Electronic Control Module (ECM), and a periodic problem is failure of the Fuel Injectors (PFI-V8 engine only). Failures of the Fuel Injectors may prevent the vehicle from starting.The cost to repair the Coolant Fan Temperature Switch is estimated at $9.00 for parts and $19.50 for labor.The cost to repair the Fuel Injectors (V6 engine) is estimated at $126.00 each for parts (total of 6) and $175.50 for labor.The cost to repair the ECM is estimated at $134.00 for parts and $65.00 for labor.The cost to repair the Fuel Injectors (PFI-V8 engine) is estimated at $134.00 each for parts (total of 8) and $338.00 for labor.All prices are estimates based on $65 per flat rate hour and do not include diagnostic time or any applicable sales tax. Transmission & Driveline Minimal Problems Infrequent problems reported, all with low repair costs. Steering & Suspension Minimal Problems Infrequent problems reported, all with low repair costs. Brakes Minimal Problems Infrequent problems reported, all with low repair costs. Heating & Air Conditioning Moderate Problems This vehicle was originally charged with R-12 refrigerant which is no longer being manufactured. The refrigerant is still available, but it is very expensive ($25.00-$50.00 per pound, 2-5 pounds per vehicle). Conversion to the new R-134A refrigerant is possible, at an average cost of about $100-$250 parts and labor. All prices are estimates based on $65.00 per flat rate hour and do not include diagnostic time or any applicable sales tax. Starting & Charging Moderate Problems An occasional problem on this vehicle is failure of the Ignition Lock Cylinder. Failure of the Ignition Lock Cylinder may prevent the vehicle from starting. The cost to repair the Ignition Lock Cylinder is estimated at $50.00 for parts and $97.50 for labor. All prices are estimates based on $65.00 per flat rate hour and do not include diagnostic time or any applicable sales tax. Accessories Minimal Problems Infrequent problems reported, all with low repair costs. Overall 4 out of 5 4 out of 5

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