******10 MPG caused by what? Update******** - Page 7 - 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 05-09-2007, 01:07 AM   #61
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What RPM'* do you run with the cruise set at 60mph?
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Old 05-09-2007, 02:55 AM   #62
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If I can remember exactly between 2000 and 2500, but I'll check tomorrow to confirm. Just like today the gas hand was at the top of the yellow Empty zone and I dirve at the most 5 miles and now its all the way on E. Also, Is my exhaust suppose to pop everytime I cut my car off. I don't know how long it does this, but it does it everytime.
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Old 05-11-2007, 01:43 AM   #63
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My RPM level using CC @ 60 mph is about 2300. Umm I also notice that when my foot is on the accelerator just cruising my gas hand drops then I stop at a light, step on the accelerator again, then the gas hand goes back to where it was, sometimes a little lower.
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Old 05-11-2007, 03:30 AM   #64
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Quote:
Originally Posted by willwren
Quote:
Originally Posted by GAMEOVER
ill put $$ thats its a faulty knock sensor
That would be foolish, considering it could be any one of 100 things, and we've really never even seen a faulty knock sensor on this entire Forum in 5 years. Let'* not toss 'might be'*' out there at this point. That can get costly.
ive seen it and experienced it on the 94
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Old 05-11-2007, 09:13 AM   #65
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Quote:
Originally Posted by GAMEOVER
Quote:
Originally Posted by willwren
Quote:
Originally Posted by GAMEOVER
ill put $$ thats its a faulty knock sensor
That would be foolish, considering it could be any one of 100 things, and we've really never even seen a faulty knock sensor on this entire Forum in 5 years. Let'* not toss 'might be'*' out there at this point. That can get costly.
ive seen it and experienced it on the 94
Find me another single instance of it in the last 5 years and 8000 members. I doubt you'll find one. Let'* stick to actually troubleshooting the problem instead of throwing what if'* out there.

Quote:
My RPM level using CC @ 60 mph is about 2300. Umm I also notice that when my foot is on the accelerator just cruising my gas hand drops then I stop at a light, step on the accelerator again, then the gas hand goes back to where it was, sometimes a little lower.
Your TCC is not locking up. You should have a check engine light and/or a stored code. This will cost you mileage, but only above 50mph. This is the same as driving around everywhere with the gear selector in 3. When cruising at 60, you should be able to pop the selector back and forth between OD and D and see no effect on the tachometer.

You need to get a scantool on the car to see if the PCM is even requesting TCC lockup, and if not, why. If it IS requesting it, and it'* not happening, you need trans service.
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Old 05-23-2007, 04:07 AM   #66
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I have yet another clogged cat!!!!!!!!!!
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Old 08-20-2007, 12:27 AM   #67
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i some how doubt that.

by what means are you determining that you have a clogged cat? is it glowing hot?
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Old 08-20-2007, 12:33 AM   #68
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Please don't dig up old threads.
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