97 SE misfire - Page 2 - 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 04-03-2009, 12:55 AM   #11
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Ya, any auto parts store should have MAF cleaner. Just be careful, it'* a very fine wire and you don't want to brake it. So no touching it.

The way the software is set up is you can license one car for 2 points, $50 a point, or that type of car for that year for 4 points, or all GM v6 engines for I think it'* 70 points. So to have all cars would be like $12,000, and that would only cover GM, not Dodge or Ford. To tune your car for $150 is a deal.
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Old 04-06-2009, 09:35 PM   #12
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oh ok thanks. well im back to thinkin it might be a vaccum leak dealing with the brake booster also. the other day i started my car and left me school and went to hit the brakes and the pedal dropped pretty far and i had to stand on it pretty hard. felt like the booster wasnt workin. no codes bein thrown tho. but i shut my car off and turned it back on and it worked just fine. its done that twice. i need to take a close look at that hose and those connections.
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Old 04-07-2009, 12:31 PM   #13
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if you're going to the floor on the first (or first and second) pump, but not on subsequent pumps, your master cylinder may be bad or going bad. If you pump the pedal, does pressure come back?

If it was the booster, the pedal would feel "hard" right at the very beginning. Excess travel is a problem with the hydraulic system (air in the system, bad/failing master cylinder, bad hose, etc).
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Old 04-07-2009, 12:36 PM   #14
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What he said. Spongy is air, hard is low vacuum. Check the brake fluid level. A vacuum leak of that size would throw lean codes and run real rough.
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Old 04-15-2009, 11:10 PM   #15
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the brake problem is only every once in a while. its only happened twice so far actually. but when it does happen its acting like the brake booster isnt working. it doesnt build pressure back up if u pump it, it still goes down really far and then you have to stand on it really hard for it to finally stop. and its still throwing lean codes, but brakes havent done that for about a month. i did notice the other day tho that when i hold the brake pedal down some with the car running, it sounds like i can hear air leaking. im gonna check that out more at school tomorrow. thanks for your help. ill let you know what i find out.
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Old 05-02-2009, 12:46 AM   #16
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finally found the leak! the problem kept getting worse and worse so i parked the bonne and drove my truck for the past week. i finally had time today to take a look at it and the o-ring on the brake booster intake connector had dried up. goin to the dealership tomorrow to order a new one! will have the bonne back on the road in the next week!
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