Power decrease and increase during acceleratoin plz help! - 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 10-31-2006, 06:55 AM   #1
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Default Power decrease and increase during acceleratoin plz help!

My bonnie latly has had a power increase and decrease through the rpm band when acellerating.... it feels as if lacked gas and then gained the gas that it needs on and off or like I am adjusting the throttle pos. when i am accelerating but i am not I have a 180 t-stat in it and before that i dont remeber that happening could it be that by ne chance or is it probally something else its not like a shudder or jolt its noticeable no matter where the throttle is and also there is a slight shudder when it does into the final overdrive gear. I also have a quiet valve tap but u can hear it if the window is open at idle and if u rev it up slightly but at higher rpms u cant really hear it.
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Old 10-31-2006, 11:41 AM   #2
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Please use punctuation and capitalization in your posts...it makes thinks much easier to read and understand!

Have you done the usual tuneup items, lately? Plugs, wires, air filter, fuel filter, O2 sensor, etc.? Check engine light come on at all? Do you know what your fuel pressure is? Those are some things to start with.
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Old 10-31-2006, 11:48 AM   #3
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Yes, like Archon says, please give us more information to go on...and lordy....write so that humans can understand what you are saying.
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Old 10-31-2006, 12:22 PM   #4
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And please also tell us if you're losing any coolant.
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Old 10-31-2006, 02:50 PM   #5
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Did plugs and ires like 8k ago air filter 5k ago yes i lose a small amount of coolant i think not to sure alot of coolant came out hen i replaced the 195 stat ith the 180 stat so it might have gone don cause of that and sorry this keyboard is kinda junky fuel filter i duno when that was replaced...... also i think the o2 sensor was replaced in the last 15k
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Old 10-31-2006, 09:17 PM   #6
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When a car surges its caused by a number of things that you will only pinpoint through the process of elimination. Could be fuel, TPS going out , Vac leak, Bad EGR, etc etc. Thats why we need all the info on what was done previously.
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Old 11-01-2006, 12:11 AM   #7
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OK, guys...I'm bowing out of this one. It gives me a headache, and takes way to long to try and decipher what'* being said. Guess I need to be younger.
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Old 11-01-2006, 12:23 AM   #8
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Quote:
Originally Posted by Archon
Please use punctuation and capitalization in your posts...it makes thinks much easier to read and understand!
I was going to say the same thing, but didn't want to be accused of being a troll.

When people don't use proper punctuation and spelling, the readers will assume one of three things:

1) The OP is uneducated or illiterate.
2) The OP is flat out lazy.
3) The OP is inconciderate and disrespectful of other forum members.

:(
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Old 11-02-2006, 07:09 AM   #9
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Well I changed the fuel filter on my car and it was an original AC Delco fuel filter.......didn't help but while I was under there I noticed the gas line was kinked. I would say it has 50% decreased flow cause of that but I am not sure. My spark plug wires arc off when I hit the rev limiter at 4k but I dont know if that would be normal any advise?
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Old 11-02-2006, 08:45 AM   #10
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Ahh, much better. Thank you

First off, get the fuel line fixed. A decreased flow can cause issues. This is not necessarily the problem, but will help eliminate the possible problems.
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