Auto performance

2001 MAZDA B3000
100,000 MILES • 6 CYL • 2WD • AUTOMATIC
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MEL PIERCEY
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  • 1 POST
I have a 2001 Mazda series pickup....two wheel drive, auto 3 litre, app. 100,000. The truck has a high level of fuel consumption, but more disturbing is the lack of power at highway speeds. On a normal incline the truck has difficulty maintaining normal operating speeds. Engine has been regularly serviced by dealer.
Jun 25, 2011 at 10:33 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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RASMATAZ
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 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.
Jun 25, 2011 at 10:48 PM
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LARRY3142
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you shoud check the rubber elbo where the pvc valve is connected it could have a crack on the back side causing a vaccum leak and making the engine run rough all the time. i had the same symptoms brought it to the dealer and they said cant find anything wrong what a joke and waste of time. i shoud of check it myself. ive been a mechanic for 45 years dealing with troubleshooting issues that the dealers cant find who knew
Sep 2, 2011 at 5:30 PM