Mike_Shepard Posted January 3, 2008 Report Share Posted January 3, 2008 I've got a 95 lumina with the 3100 v6, I am having problems with the car running, It starts up fine and even drives kinda good after it cools down but once you drive it for about 20-30 minutes you better hope your not in a hurry to get anywhere. It sputters so bad that 35MPH is about the fastest I can get it I've changed the plugs wires and coil packs and this did not help. The plugs didn't look to bad really but I changed them anyhow. I've not been able to check fuel pressure yet but the Fuel pump is noisy as hell. Does this sound like sound like a O2 sensor problem? Quote Link to comment Share on other sites More sharing options...
verse Posted January 3, 2008 Report Share Posted January 3, 2008 So when it gets hot it sputters and has a lack of power? Possibily a bad cat. Quote Link to comment Share on other sites More sharing options...
Mike_Shepard Posted January 3, 2008 Author Report Share Posted January 3, 2008 Yea when its hot it acts worse. Thats what my father in law thought (was his old car) so he drilled holes in the cat thinking that would fix it but it didn't. Quote Link to comment Share on other sites More sharing options...
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