Supercharged/Turbocharged The increase in air/fuel pressure above atmospheric pressure in the intake system caused by the action of a supercharger or turbocharger attached to an engine.

rough idle?

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Old 05-17-2005, 09:43 PM
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rough idle?

Idle around 500 and below. Car stalls out sometimes. Pulls like a champ though. ses light on.vaccum at about 10 hg. Blitz bov not wanting to bleed at idle unless I take out the air temp sensor from charge pipe before throttle body. V1 kit. I think I can hear a vaccum leak but... Anyone have any ideas?? thanks
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Old 05-19-2005, 05:07 AM
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Originally Posted by vortechpower
Idle around 500 and below. Car stalls out sometimes. Pulls like a champ though. ses light on.vaccum at about 10 hg. Blitz bov not wanting to bleed at idle unless I take out the air temp sensor from charge pipe before throttle body. V1 kit. I think I can hear a vaccum leak but... Anyone have any ideas?? thanks
Low vacuum and rough, low idle point to a vacuum leak. So does your bov not wanting to open at idle.

But why your bov opens when you remove the IAT sensor is beyond me...
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Old 05-19-2005, 10:03 PM
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not a clue but good luck man

when you comin back down?
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Old 05-19-2005, 11:14 PM
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Shouldnt you see about 18-20 HG of vacuum ?? thats what I normally see

-matt
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Old 05-20-2005, 08:00 AM
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Mines idles rough below 500 too. It's always idled really low like that, I think it just doesn't like running that low with the S/C. If I bump up the idle, it goes away. I'm pretty sure I run more vacuum than 10 hg as well.

On a similar note, Mine car will stall on engine decel at times. Usually when I take a corner, and the rpms are dropping, once I turn the wheel the extra engine load kills the engine. I've tried everything and can't get it to stop. Kinda dangerous losing power steering mid turn.
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Old 05-20-2005, 02:24 PM
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Used to run just fine. Think im gonna hook it up to a smoke machine to find the leak. Yeah the bov doesn't want to release any air at idle?? Maybe the bov is busted but I think a vaccum leak is the cause. THis all started at the track about a month ago... Ran a 13.6 though!!

Sup Jeff, I should be back soon!
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Old 05-20-2005, 02:58 PM
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Or you have a HKS SSQ BOV - which will never release air at idle.

Definite vacuum leak tho.
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Old 05-21-2005, 04:21 PM
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Just dropped the transmission lastnight! Had to start off in 4th. This is from a long term issue starting with a bad install on the clutch over 2 years ago....
Looking back the vaccum leak wasn't all that bad.
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Old 05-21-2005, 04:49 PM
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no doubt vacuum leak!
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Old 05-24-2005, 06:38 PM
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did you get a new tranny yet?
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Old 05-26-2005, 08:27 PM
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No. I have been looking around. Best price is $750 with 40k. Need to do something soon! I get 1, 2 4 and 5th gear but sometimes 1 and 2 get jammed up. Im not sure how bad the damage is but my 5th syncro has been broke for 2 years so thats still an issue so I need to take it to someone and GET R DONE!
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