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Old 01-11-2012, 06:30 PM   #1
harrington81
 
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rough idle after intake install

can somebody please delete this thread!

Last edited by harrington81; 02-13-2012 at 08:30 PM.
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Old 01-11-2012, 06:39 PM   #2
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How much better when warm? I'd check the hose clamps, maybe they loosened up in the cold weather.
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Old 01-11-2012, 06:52 PM   #3
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Have you run a full tank of gas through since it started running rough? Is the check engine light on?
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Old 01-11-2012, 06:53 PM   #4
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I would check all the hose connections again. Also check the orientation of the MAF.
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Old 01-11-2012, 06:57 PM   #5
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I will check the hoses and clamps. What's the orientation of the MAF? And yes i've ran several full tanks through. No check engine light. If it had one i would've scanned it a long time ago.
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Old 01-11-2012, 07:02 PM   #6
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I seem to remember that the MAF could be installed backwards. The locking tab should be up.

I also added silicon gasket maker around the MAF for better sealing.
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Old 01-11-2012, 07:05 PM   #7
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The arrow points to towards the throttle body. That's the way i did it.

I do remember sometimes when the car was cold I would let out the clutch and it would sputter and shake like crazy. Only sometimes and not for very long.
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Old 01-11-2012, 07:14 PM   #8
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Sounds like an air leak to me.
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Old 01-11-2012, 07:16 PM   #9
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Any trouble codes? If it hasn't been tuned after the CAI install, that could be the problem, but you need to verify it with a scan tool.
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Old 01-11-2012, 07:22 PM   #10
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Quote:
Originally Posted by Majic View Post
Sounds like an air leak to me.
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Old 01-11-2012, 07:22 PM   #11
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Excactly. I would never do this mod again without it being tuned. But voiding the warranty ain't gonna happen.
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Old 01-11-2012, 07:31 PM   #12
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Leak

Vacume leak !
Don't need a tune.Had mine on since 2010 .No problems.Ever.
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Old 01-11-2012, 07:37 PM   #13
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I just had the same exact problem... When it started getting down around 20-30 degrees F.
I found two things...one the small vacuum hose running from the intake to the engine had a small crack in it. ( however I don't believe this was the issue at all) second was all the hose clamps were loose especially around the throttle body and the filter was barely on. I tightened all of them and it runs great. Mine eventually threw a codes p0174 and p0171. After tightening clamps I the codes and they haven't come back. The LS3 sucks a ton of air and from what I've read too... much an the computer can't compute the air fuel curve.
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Old 01-11-2012, 07:38 PM   #14
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*reset the codes* sorry for the typos.... Sending from phone
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