2000 Ford Ranger Loses power and has terrible gas miliege

Tiny
DELAROOO
  • MEMBER
  • 2000 FORD RANGER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 144,000 MILES
My truck recently coded for bad O2 sensors and I had all of them replaced. After the O2 sensors were replaced, the vehicle now loses acceleration and does not get good gas mileage. When diving it often shifts suddenly from 2000 rpm to 2500 or suddenly loses all acceleration and starts to coast until it shifts and then gains power again. When on the highway, it doesn't coast, but if rpms drop below 2000 it will chug a bit. When idle it will also chug and run very rough, but only once in a while.
Tuesday, April 6th, 2010 AT 1:47 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lack of acceleration, chugging, hesitating, bogging etc. Could be caused by one of the following below.

Inspect and test all the following listed below and get back with some results

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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Saturday, September 30th, 2017 AT 4:56 PM

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