Auto performance

MEL PIERCEY

MEMBER
2001 MAZDA B3000
6 CYL
2WD
AUTOMATIC
100,000 MILES

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.

2 Replies

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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Saturday, June 25th, 2011 AT 10:48 PM

LARRY3142

MEMBER
1 POST

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

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Friday, September 2nd, 2011 AT 5:30 PM