Just not making enough power - 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 11-24-2006, 06:37 PM   #11
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Thanks for the replies guys. I picked up a new fuel filter and will be installing it, for kicks and giggles.
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Old 11-24-2006, 06:50 PM   #12
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The FPR could fail without allowing gas into the vac line.
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Old 11-24-2006, 08:45 PM   #13
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I replaced the fuel filter...no change.

I'm starting to think that something'* let go inside the engine or the transaxle. I know my car pretty well, and it "sounds" like it'* in gear with your foot on the brake, when it'* in park/neutrel. It'* like its under a little bit of load at all times. Idle is slightly lower, as well.

My IAC count at idle, about 750 rpm, is 48. Is that normal? Like I said I think it'* under a load. Could something in the tranny have crapped out?

BTW, with the two front wheels off the ground, in neuttrel, does the other side spin in the opposite direction like a normal "open" truck axle?
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Old 11-24-2006, 08:49 PM   #14
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Also, I tested the compression of all cylinders, and all are close to each other and well above the 100 psi that the FSM suggests for an LN3.

Can a bad torque converter do this? But I have the problem whether its locked up or not.
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Old 11-24-2006, 08:53 PM   #15
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Scan it. That'll tell you if you have a bad TC.

Get a boost gauge.

Fix your fuel pressure. It'* not high enough. The filter isn't likely to be your problem.
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Old 11-24-2006, 08:55 PM   #16
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Will: no codes present.
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Old 11-24-2006, 08:57 PM   #17
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I didn't ask for codes.

You need to check for TCC slip rpm'*.

Don't you have a scantool?
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Old 11-24-2006, 09:00 PM   #18
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Sorry I don't Will. I guess I've been too lucky having a Reatta with Diagnostic Mode and haven't had to buy a scan tool.

There HAS to be a way to get this reading that you speak of. You know the readout-code for it?
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Old 11-24-2006, 09:40 PM   #19
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You need a scantool. You absolutely need one with your conversion. There are far too many parameters you need right now that you can't obtain through OEM diagnostics.
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Old 11-24-2006, 09:49 PM   #20
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My local mechanic has a Snap On scantool. Should I ask him to look for anything specific, like the TCC slip RPM? I'm not in a position to buy one right now, and he'll scan it for a case of Coke.

Could my catalytic converter have crapped out, causing a ton of blockage?
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