1988 FORD BRONCO IDLES ROUGH AT 4000 RPM'S

  • Tiny
  • crooks4
  • 1988 Ford Bronco

Engine Mechanical problem
1988 Ford Bronco 6 cyl Four Wheel Drive Automatic

I have a 1988 ford Bronco II 2.9 Fuel Injected.
It runs good until you hit between 3-4000 rpm's. Then it acts like it's not getting enough gas. I have replaced the fuel pump and the filter. Thanks for any advice you have. We are trying to fix this for our daughter to drive.

Friday, July 16th, 2010 AT 2:02 PM

1 Answer

  • Tiny
  • rasmataz
  • Member

Possibilities: Inspect and test all the following listed below: Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock 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 it.

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Friday, July 16th, 2010 AT 4:16 PM

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