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Old Apr 27, 2005 | 09:53 AM
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i've done a swap to a 2001 ls1 in my silverado and the idle is rough on it. it'll drop and raise right around 500 rpms and sometimes die. i have a SES light and that is for intermittent TPS, but we've replaced that. we've also sent the computer back with a log, but we haven't recieved it yet.

any ideas?

Last edited by onyxsilverado; Apr 27, 2005 at 12:36 PM.
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Old Apr 27, 2005 | 01:05 PM
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no ideas?
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Old Apr 28, 2005 | 02:59 PM
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hmmm....i guess since i'm not asking about a cam, i'm on my own....
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Old Apr 28, 2005 | 05:30 PM
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Is the LS1 engine all stock? If you got it used, someone could have put a cam in it, changed the stock PCM tunning, changed the MAF, etc. Check for vacuum leaks as well. Are the TB hose clamps tight? Have fresh gasoline, how do the plugs look? Stuff like that.
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Old Apr 28, 2005 | 08:43 PM
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Check the intake manifold bolts - make sure they're torqued down to spec.
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Old May 9, 2005 | 08:27 AM
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Originally Posted by Cal
Is the LS1 engine all stock? If you got it used, someone could have put a cam in it, changed the stock PCM tunning, changed the MAF, etc. Check for vacuum leaks as well. Are the TB hose clamps tight? Have fresh gasoline, how do the plugs look? Stuff like that.
it's mostly stock...just exhaust, headers, intake, and tuning. How do i check for vacuum leaks?
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Old May 9, 2005 | 12:55 PM
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is there another place i should call/post to ask these questions?
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