LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

emissions

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Old Dec 4, 2003 | 01:21 PM
  #1  
lt4 fd's Avatar
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From: plano texas
emissions

Hey if I dont have the smog pump on for the test and the cats are still a little warm from the drive will I pass emissions.... I know the smog pump helps with cold start emissions... if not is there a temporary program I can run, I have tunercat and datamaster, that will allow me to?
Old Dec 6, 2003 | 12:27 PM
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lt4 fd's Avatar
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Anyone know??
Old Dec 6, 2003 | 02:04 PM
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The AIR pump only turns on for a few minutes to help heat up the cat. That's the only time though. So if your cat is already warm, you should be fine.
Old Dec 6, 2003 | 03:49 PM
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Yeah I wasnt sure if there was a cold start emissions test or whatnot, heard somewhere there was but I talked to a guy today and he said he lets them warm up first so thanks.
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