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I have a 2001 Pontiac Grand Am GT, my service engine ...

Sent to Car Experts October 18, 2006 1:10 a.m.

I have a 2001 Pontiac Grand Am GT, my service engine soon light keeps coming on. I hooked up the scan tool and it read a misfire code PO303 ,engine misfire detected, in the 3rd cylinder so i gave it a tune up , spark plugs, wires ,filters. The light went out but then it came back on and the code said the fuel injector circuit for the #3 cylinder came up and was malfunctioning . I then did a fuel injector cleaning and intake cleaning . It was running good for that night and the following afternoon but then the service engine light came on again with that PO303 again. I think it might be the coil pack. but im not sure. or maybe the injector is bad . WHAT DO U THINK

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2001 Pontiac grand am 3.4l V-6

Customer (name blocked for privacy)

Status: Closed Value: $9

Info Request
October 18, 2006 1:59 a.m. (49 minutes and 27 seconds later)

We've had alot of injector problems on GM products.The multitec injectors don't hold up very well.Do you have a digital volt ohm meter to test these with?

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