When 95 se bonne is at OP Temp the engine bogs, no MIL codes - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-20-2005, 02:44 AM   #1
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Default When 95 se bonne is at OP Temp the engine bogs, no MIL codes

I have a 95 bonne SE and when it gets to Operating temp It will bog down. It will be fine up till about 15% and higher throttle, in all gears. I have replaced O2 sensor,Air flow meter, Throttle Position sensor, Plugs and wires(all factory). Also did intake and top engine cleaner. Nothing. Also briefly removed CAT and used a straight pipe to see if it had a block. Nothing, Still bogs. Also no Check engine codes. Transmission seems fine, has been pressure tested and power flushed. Engine has 135K on it. But this has been an on going problem for at least 35K, Hmm ever since the Dreaded 100K mile rollover.
Please Help I am running out of Ideas and Money. I Hate the Shot-gun approach.
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Old 01-20-2005, 08:23 AM   #2
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Some other things to consider:

Dirty fuel filter
Weak fuel pump
Fuel pressure regulator
Weak coil
Bad ignition control module
Dirty grounds on ICM, PCM
Low alternator voltage
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Old 01-20-2005, 08:25 AM   #3
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im thinking its a bad coil or ignition control module
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Old 01-20-2005, 05:04 PM   #4
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Could it be the EGR valve?

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Old 01-30-2005, 03:52 PM   #5
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I Have tried a swap of the IC Modual assy and the EGR valve and drove. No Change. It seems to happen about when it goes into closed loop. Fuel Pump Weak? Filter is brand new. Good Pressure (tested Before Closed loop.) =[ ?
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Old 01-30-2005, 04:28 PM   #6
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When you swapped ICM'*, did you keep your coils, or try the others? Heat-related failures aren't uncommon with our coils after a few years. Work fine cold, then not hot.

I'd pull all 6 plugs and keep them in order. Inspect them carefully. They'll tell the story, and be able to show whether you have fuel or ignition related problems.
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Old 02-01-2005, 02:01 AM   #7
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Yes, I swapped the coils as well as the ICM (Swapped the whole assy) no difference. The plugs are pretty new (delco). My muffler has some buzzing/rattling noise when accelerating. Maybe a rotten muffler? By the way I thank you all for the reply'*.
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Old 02-01-2005, 02:14 AM   #8
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Have you tested fuel preassure? There should be a connection on the rail for it. If my memmory serves me correctly, it shoudl be in teh 40lbs range, but I am not positive.
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