1992 Pontiac Bonneville Stalling out/loosing power

1992 PONTIAC BONNEVILLE
12,944 MILES • 6 CYL • FWD • AUTOMATIC
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MORGAN203
  • MEMBER
  • 1 POST
During my test, the vehicle ran perfectly for 40/50 miles. After this, you could increase your speed if only using partial acceleration. If using the passing gear, it would roar (as with increased rpm) but would not increase speed. On other occasions, the pickup was random: i.e., the passing gear would work or not and nothing would increase speed.
Jun 22, 2010 at 2:40 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard
Nov 5, 2018 at 7:11 PM
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