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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

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Old 06-28-2008, 08:52 PM
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Default New LTs
I just put on a set of LT's on my 97 Z and now it seems to have a vaccum leak any ideas? Would not having the egr blocked off cause this?
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Old 06-28-2008, 09:35 PM
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Originally Posted by WH97Z
I just put on a set of LT's on my 97 Z and now it seems to have a vaccum leak any ideas? Would not having the egr blocked off cause this?
Did you eleminate the EGR/AIR? Check anything that you may have disconnected, make sure its all hooked back up.
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Old 06-28-2008, 09:48 PM
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Yes, the headers do not have provisions for egr and the air pump tubes are wide open.
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Old 06-29-2008, 03:00 AM
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uhh... roger... ya you should have no open hoses... that's a negative. pull all that junk out of there and tune out the codes. your definetly screwing with the pcm and it doesn't know what to do.
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Old 06-29-2008, 01:22 PM
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will pull out the air pump today. should i get a block of plate for the egr tube?
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Old 06-29-2008, 01:44 PM
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yes you should
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Old 06-29-2008, 02:30 PM
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your gonna wanna to unbolt all the egr components in the rear too
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Old 06-29-2008, 04:58 PM
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what company makes the block off plates? Also is there a good place on line to buy them?
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