COULD I HAVE AN INJECTOR PROBLEM?

2001 Mazda Millenia

Tiny

poppabrand

January, 15, 2012 AT 8:30 PM

The engine codes read P0140 and P0303.
I have already replaced the plugs, wires, distributor and rotor. Additionally all the back plugs are black (1, 3 & 5 with #3 the worst). The engine runs rough and has a definite backfire. Could this possibly be an injector? Or could the o2 sensor cause such an obvious misfire?

FOUND 1494 RELATED QUESTIONS

1 Answer

Tiny

fixitmr

January, 15, 2012 AT 10:24 PM

Rear cylinder bank is running rich apparently.

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