Stuttering Acceleration - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-15-2005, 03:15 AM   #31
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Not the wires or plugs. I'm stumped right now. Does anyone think that the balancer could cause these symptoms? I dont want to go spending $150 on a busted motor.

By the way she is running now. Dont know what happened when my wife was driving her.

For a recap I've replaced the Ign module, coil, wires, and plugs. She has a strong odor of gas coming from the tail pipe, and it sounds like she is spitting out the tail as well, and absolutely no power.
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Old 05-15-2005, 09:59 AM   #32
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What about the EGR Valve? Have you tried pulling the exhaust to see if the cat is the problem?

Obviously it isn't ignition related. And if you pull a plug, is it wet with fuel or anything?


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Old 05-15-2005, 12:07 PM   #33
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plugs had a little carbon on them but not too much. No oil no gas. I cut the Cat off first cause that'* how it feels, like the exhaust is plugged. I'm gonna pull the muffler and fuel rail today.
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Old 05-15-2005, 12:34 PM   #34
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Drop the whole exhaust [isn't hard], and run the car with just headers. It'll be loud, btw .


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Old 05-15-2005, 03:16 PM   #35
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Not the exhaust. Autozone loans compression testers, I think I'll go get one.
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Old 05-16-2005, 05:27 PM   #36
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Not the fuel system. I wonder if an exhaust valve is busted? Anyone know how to check?
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Old 05-16-2005, 06:13 PM   #37
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compression check will tell if its leaking.
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Old 05-17-2005, 11:41 AM   #38
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Quote:
Originally Posted by SSEBONNE4EVA
compression check will tell if its leaking.
Yes a compression test can tell.... Run the compression test and get back to us..

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Old 06-20-2005, 02:47 PM   #39
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Compression fine. 155psi on 1,5, 150psi on 3,2, 145psi on 4,6. Book says they should be over 100psi and above 70% of the highest. By the way we need the 14mm long adapter on the compression tester.

Any other ideas? Maybe ECM? Maybe crank sensor/ pulley? What are a bad EGR symptoms?
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Old 06-20-2005, 03:50 PM   #40
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Have you pulled codes? And or have you had any codes...

I'm thinking the ECM may have bought the big one... But its hard to say yet...

If you lived near me we'd swap in an ECM as a test...

Know of anyone that has a 88-90 H or C body with the Vin C 3800? Maybe you could borrow an ECM for a few minutes?

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