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Engine won't rev

F-Body Problem Diagnosis Got a problem you can't fix? Post here and one of our members will answer as soon as possible.

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#1

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07-15-2007, 04:17 PM

drjimmy

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Engine won't rev

I just rebuilt an LT1 for my 94 and the engine starts fine but won't rev past 500rpm. There are no codes. I thought it might be a plugged cat so I dropped the y pipe. No change. Put my scanner on it and the computer is requesting 800rpm but not getting there. It will eventually get to closed loop but still wont rev. Any ideas?

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#2

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07-16-2007, 07:16 PM

hotrod_chevyz hotrod_chevyz is offline

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Re: Engine won't rev

double check the timing and look for vaccum leaks.

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#3

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07-17-2007, 09:30 AM

wrightz28

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Re: Engine won't rev

You know, I pondered this one for a while yesterday when I saw it. Is the PCM seeing the throttle position (change)?

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#4

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07-20-2007, 07:24 PM

drjimmy

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Re: Engine won't rev

Quote:

Originally Posted by wrightz28

You know, I pondered this one for a while yesterday when I saw it. Is the PCM seeing the throttle position (change)?

Yes, the computer is showing throttle position change.

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