Gas problems
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Gas problems
Have a 1995 Pontiac Bonneville SE 3.8 The car runs great with it'* newly rebuilt engine. Recently I noticed it has been using a lot of gas. Upon inspection - I see smoke being emitted from the tail pipe with a heavy odor of gas. I cleaned my MAP sensor. Car still smokes at tailpipe. Tried raping the gas regulator to see if anything was stuck (who knows)..and also fixed a leaking vacuum line at the gas regulator.
Does anyone have any ideas as to what could be causing this to happen. I also thought of a oxygen sensor. I am thinking the gas regulator is bad or the oxygen sensor is bad. Has anyone ever had this happen to there car. I had checked the forum and saw no mention of this kind of problem - specifically. Thank you for your help.
Does anyone have any ideas as to what could be causing this to happen. I also thought of a oxygen sensor. I am thinking the gas regulator is bad or the oxygen sensor is bad. Has anyone ever had this happen to there car. I had checked the forum and saw no mention of this kind of problem - specifically. Thank you for your help.
Retired Senior Admin
Expert Gearhead
Joined: May 2006
Posts: 29,661
Likes: 43
From: Sheboygan Wisconsin
Check/change/test your intake air temp sensor, MAF, O2 sensor. These all effect your AFR. If you have a strong gas spell at the tail pipe your cat may be shot.
Senior Member
True Car Nut
Joined: Sep 2008
Posts: 7,979
Likes: 2
From: Arlington, WA
So you said you cleaned the MAF sensor and it'* still smoking and smelling of gas? I would change the upper O2 sensor next. Go with a DENSO and stay away from the BOSCH. After you change the sensor, then let'* see what happens from that point forward.
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