poor performance - 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 09-17-2007, 12:33 AM   #1
Darrel
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ok, I've got a bit of a studer in the engine when accelerating slowly from a stop. it doesn't happen every time and if i accelerate a little faster it doesn't happen either. i thought that it was trans trouble at first so i had the local trans shop do a fluid and filter change and check things over for me. said it look ok and that what I'm noticing is engine trouble that should be fixed with a good tuneup. he wanted over $350 for a tune up so of course I'm doing it myself. I wouldn't have anyone else do it anyhow! So, I've already cleaned the K&N, done the oil change, fuel system/injector cleaner... I am going to do Fuel filter, plugs and wires. Is there anything else that i can look at that might be the cause of this problem? it is just annoying more then anything.


Oh, i think that the plugs will probably fix it though. My dad and I tried something he read in a magazine of his and filed back the negative electrode on the plugs to expose 1/2 of the positive electrode... supposedly more horsepower, but i never noticed anything special for sure. I wonder if that "mod" is causing this problem now. either way, the plugs are about 2 years old i think so they're out!
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Old 09-17-2007, 01:03 AM   #2
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A tune up couldn’t hurt, plugs would be a good and cheap starting point. Ever replace your catalytic converter?

Ed
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Old 09-17-2007, 07:20 AM   #3
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Hmm... no, never replaced the cat. i'm wondering how much longer the exhaust system is going to last anyhow. i've never touched it and i know its pretty rusty under there...
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Old 09-17-2007, 10:12 AM   #4
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I used to have this issue on the 99 SE in my sig.

It ended up being a combination of things. What I did to rectify it were:

Replaced fuel filter
New TR55 plugs
New Delco wires
Cleaned the throttle body

You'll probably net the most improvement from the throttle body cleaning.
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Old 09-17-2007, 10:16 AM   #5
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is cleaning the throttle body a fairly simple process, as in could be finished in a day? if so i may need to give that a shot.

TR55 plugs... i tried to find those last time and no one carried them... any suggestions?
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Old 09-17-2007, 10:24 AM   #6
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In the past, I bought the TR55s from Advance or Murrays.

The TB cleaning can definitely be done in one day. I'll search and see if I can find a link of the procedure since I don't have time to type it all right now...
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Old 09-17-2007, 10:48 AM   #7
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i hit up the tech info section and found this. it doesn't look to bad at all

http://www.bonnevilleclub.com/forum/...+throttle+body
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Old 09-17-2007, 11:21 AM   #8
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Tha'd be the one.
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Old 09-17-2007, 04:28 PM   #9
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is murrays owend my advance? or the other way arround? both web sites are the same... odd. anyhow, just wondering.
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Old 09-17-2007, 04:29 PM   #10
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They are both Parts America companies.
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