C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Failed inspection, engine running dirty

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Old Jun 1, 2003 | 05:17 PM
  #1  
Hall1836's Avatar
Hall1836
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From: Farmingville NY
Default Failed inspection, engine running dirty

Found out previous owner gutted cat, replaced cat passed inspection. Found spare ECM chip in car DELCO HLR 0977. Apparently this is for overseas cars without cats. Has anyone gutted cat and used this chip? Will it pass inspection with this chip in. I don't know whats in the car now, hoping to get information from previous owners. Where is the prom located on a1985 and how hard to change. Older member not computer friendly, much experience in carb cars thanks.
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Old Jun 1, 2003 | 05:30 PM
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CorvetteZ51Racer's Avatar
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From: Houston TX
Default Re: Failed inspection, engine running dirty (Hall1836)

The ECM is up underneath the dash on the passenger's side. There is a little cover plate with two hex head screws that cover the PROM for the ECM.
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Old Jun 1, 2003 | 06:05 PM
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flyersfan1088's Avatar
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From: What did the 5 fingers say to the face? SLAP!!
Default Re: Failed inspection, engine running dirty (CorvetteZ51Racer)

It's easy to change but you literally have to stand on your head to see it.
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Old Jun 1, 2003 | 10:22 PM
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CFI-EFI's Avatar
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Default Re: Failed inspection, engine running dirty (Hall1836)

My '84 passes with a gutted cat. In a few weeks we'll see if it makes it with the X pipe and no cat. Good luck and ...

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