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1992 Pontiac Bonneville Stalling out/loosing power

Tiny
MORGAN203
  • MEMBER
  • 1992 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 12,944 MILES
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.
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Tuesday, June 22nd, 2010 AT 2:40 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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
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Monday, November 5th, 2018 AT 7:11 PM

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