po307 code and fuel pump problem
08-10-2005, 09:26 PM
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po307 code and fuel pump problem a week ago my car's fuel pump started whinning something awful. i just received my racetronix pump and we're going to install it this friday. well last night my car through a p0307 code (cylinder 7 misfire). i checked the plugs, wires and coil for cylinder 7. their is fire. could this be caused by the fuel pump or is it an injector failure or something else? thanks for any of your help. oh i also have p0133,p1134,p1154,andp0153 which have to do with the front o2 sensors. my new gm o2 sensors will be here also friday. can these codes also be a part of the p0307 problem?
Last edited by Scully; 08-10-2005 at 10:35 PM.
08-11-2005, 07:47 PM
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might have been a lean misfire on # 7 ,if it was suprised you didnt get a lean code or a P0300 multy cylinder misfire. Did you happen to get a fuel pressure reading?
08-11-2005, 11:24 PM
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i didn't get the p0300 code people have talked about. just the #7 cylinder. oh the fuel pressure reading is at 60psi at idle. i don't know what it is going down the road cause i don't have a fuel pressure gauge that i can see. just the test gauge i've got. i cleared the p0307 code last night, drove about 15 miles today and the car never through another code, but under a load it cut out something awful.
08-12-2005, 12:33 PM
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mine started doing the same thing....mine idles at 60 psi but under slight load it cuts out. mine did throw a Multi cylinder misfire code. i have a large line im going to tape it to the windshield and drive around a bit tomorrow. what should my fuel pressure be at WOT? does this sound like a fuel pump to anyone? all wires and plus are firing. sorry to hijack the tread but im having all the same probs. i hope my post can help you too
08-12-2005, 03:24 PM
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man no problem. i don't know what the fuel pressure is at wot. mine i hope is the fuel pump cause it was giving me probs for the past 3 weeks. i'm changing it tonight, and i'll keep you all posted. if you find anything else about your car drop us a line. it could help some of us to. thanks
08-12-2005, 11:55 PM
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well i got my racetroxix fuel pump in tonight. it was easy to install. props to the guys at harris speed works who took care of me in the purchasing process, and great work to the guys at racetronix for the great pump. the fuel pressure is up around 7-8psi (66-67). thanks.
