tach issues - 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 04-07-2006, 04:03 PM   #11
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i meant OldBluesEyes...sorry hans...i dont know how long it has been doing this, since i have only had the car officially mine for 3 months
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Old 04-12-2006, 02:43 PM   #12
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I rev'ed it up in Park and Neutral Today, and it went all the way to 5600 before I let off. It was still going too. MY COMPUTER MUST HAVE GONE BAD, CAUSING NO REV LIMITER...AHHHHHHHHH
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Old 04-12-2006, 03:20 PM   #13
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you need to hook up with someone that has a scantool.....NOW

this way you can see the actuall data that the PCM is seeing and compare it to your dash
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Old 04-12-2006, 05:05 PM   #14
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Quote:
Originally Posted by 1993 SLE
you need to hook up with someone that has a scantool.....NOW

this way you can see the actuall data that the PCM is seeing and compare it to your dash
i might try and see if autozone will let you rent one. I think they do, but not sure. I have been staying away from WOT, and when it does shift that high, I let off around 5600 until it shifts
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Old 04-12-2006, 05:34 PM   #15
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Scan first to see if the Tack is way funky... I believe it is...

I don't think the PCM or Mem Cal is bad...

And you can tell when you over rev a 3800 in gear, its something you can feel..

If you really want another PCM find a 93 H body with the same engine and Gear ratio so that you can have both the PCM and Mem Cal but I don't believe thats your problem..

I believe the park limiter is 5200 on the 93 L27, and fuel cutoff is 5600.. As well the PCM should not let you shift much past 5200 in the first place... And the 3800 isn't going to go through the revs that fast at the speeds you were doing...

The Scantool info will be the deffinite answer.. Anything beyond that is a guess

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