need help fixing ride - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-13-2009, 02:06 AM   #1
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I got a 1994 bonneville, I'm starting to fix her up,but I have problems under the hood that need to be tighting up first, First,about 30-40 mph it start to shaking like crazy and I press the gas pedal but it won't go any faster,second as I go up a hill the car loss power and again,I press the gas but no reaction,anyone have any idea whats the problem,so i can fix it
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Old 04-13-2009, 08:34 AM   #2
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I would say check your fuel pressure. Sounds like your running out of fuel and leaning out. Pull the plugs and take a look. If they are anything but a light gray take pictures and post them.
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Old 04-13-2009, 06:26 PM   #3
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mine did something similar after i got her up and running from sitting for 3 yrs... it got worse as i drive and i examined and 2 plugs had incy wincy hairline fractures in the insulation and it was grounding out thru the crack once the plugs warmed up... so check them WELL... and make sure you get good brand plugs, wires, and 02 sensors if you replace them... these cars dont take kindly to lower grade parts... they like oem

do you have a SES light on??? if so you might want to try to get it scanned, that would help us with where to look further... but make sure its a odb 1.5 scanner... its a 1.0 computer system with a 2.0 data link plugin so you need a techII scanner or 1.5 code reader... its a pain but i feel ya
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Old 04-13-2009, 06:56 PM   #4
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If you take a spray bottle filled with water and mist the plugs, wires, and coils while running, then turn the lights off and watch in the dark. You will see blue flashes if anything is arching to ground.
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