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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 01-18-2006, 10:14 PM   #1
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I posted earlier this week saying how my car was running like crap and it was coming up with MAF and TPS codes. I replaced both of them. The car runs great now. The problem now is my idle is a little high. It is around 1300-1400 RPMS. Do I need to adjust the TPS? it is adjustable. Or will the computer eventually learn? I put the new TPS on as closely as the old one was set to.

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Rob
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Old 01-18-2006, 10:26 PM   #2
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I believe that on the 92'* the TPS needs to be calibrated..

And did you have the high idle problem before?

What type of MAF did you use? Brand?

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Old 01-18-2006, 10:46 PM   #3
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the idle was high right after i did the TPS. This was before the MAF. I got a MAF from autozone. The TPS seems to be in a weird spot and I had to take the throttle body off to swap them.

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Old 01-19-2006, 12:36 AM   #4
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Did you use a new gasket? Are you sure you reassembled with no leaks? That can cause a high idle. A vacuum leak can too.

The TPS on your 92 will have to be adjusted. You can use an ohmmeter or scantool. It CAN be adjusted on the TB, but it'* a tight squeeze. It'* all about selecting the right tool.
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Old 01-19-2006, 07:37 AM   #5
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I did re-use the gasket. I don't think I have any leaks. I checked it a few times. Would the TPS cause the idle to be high if it is not calibrated correctly?

Rob
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Old 01-19-2006, 09:47 AM   #6
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Yes, it can to some extent. Make sure your throttle cables also move freely and that your throttle plate is fully closed at idle. You'll have to remove your MAF screen (gently) to be able to see this.
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Old 01-21-2006, 04:41 PM   #7
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I checked my TPS sensor voltage and it was at .30 at idle and 4.2 and WOT. Is that about normal? Seems a tad low at idle compared to what I have been reading on here.


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Old 01-21-2006, 10:02 PM   #8
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I think the TPS Sensor voltage should be closer to o volts at idle which equates to o % TPS angle as it is interpreted by the ECM.
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Old 01-21-2006, 10:20 PM   #9
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Old 01-22-2006, 09:15 AM   #10
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Quote:
Originally Posted by markwb
voltage should be closer to o volts at idle
Sorry, I didn't literally mean dead zero. I thank you for pointing that out. : )
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