my bronco has lost power and accelaration

1989 FORD BRONCO
142,051 MILES • V8 • 4WD • AUTOMATIC
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MICLO
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  • 1 POST
hi my 1989 ford bronco 4x4 makes a deep throat noise and shake a little and has lost power too.it feels like every times im driving it im towing something. i alrady know for a fact that the spark plugs and wires are not the problem nor are the pistons or cylinders.i have changed the rotor and the distributor cap too.
Apr 1, 2011 at 9:51 PM
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RASMATAZ
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  • 75,992 POSTS
Could be caused by one of the following 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.
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 and keep testing.
Apr 1, 2011 at 11:47 PM