My Bronco has lost power and accelaration

MICLO

MEMBER
1989 FORD BRONCO
V8
4WD
AUTOMATIC
142,051 MILES

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.

Friday, April 1st, 2011 AT 9:51 PM

1 Reply

RASMATAZ

MECHANIC
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.

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Friday, April 1st, 2011 AT 11:47 PM