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Help With High Idle/ BOV staying open.

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Old 12-17-2010, 09:23 PM
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Default Help With High Idle/ BOV staying open.

I am going back throught the car and fixing all my small issues. One of the issues was it was idling high (above 2k rpms) we figured it was the intake seals so i went back throught and replaced them, now the car still does the same thing. also i noticed while its idling (@ 2k) that the BOV is open.... doesnt make sense to me i dont think it did this before. and alot of air is coming out of the BOV so im assuming the car is boosting, which also doesnt make sense.

Could a leaky injector do this? or maybe the wrong spring in the BOV. but like i said i never noticed the BOV open at idle before....

I have an BBK SSI intake with a pt88 front mount with 80# injectors and an iron 346 with stock 317 heads.
Please help guys
Old 12-17-2010, 10:15 PM
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http://www.jegs.com/i/BBK/129/5004/10002/-1 this is my intake but if u look at the back of the tb it shows a hole goin into the stock ls1/ls6 intake but the bbk does not have this hole...
Old 12-17-2010, 10:27 PM
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Have you checked ALL lines for vacuum leaks? Wastegate, bov, brake booster, boost gauge, MAP, etc...

The BOV is prolly only open bc you're most likely at less vacuum with a high idle. That's prolly just an affect and not a cause. And it's spewing out air bc the turbo is pushing a little air at that rpm. I wouldn't worry about that part.
Old 12-17-2010, 10:29 PM
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If there's a hole in the throttle body that goes to atmosphere then that could be the source as well.
Old 12-17-2010, 10:52 PM
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the car will not boost at all im sure its because the bov is stayin open should i try changing the springs in the bov BUT it boosted before so im rather confused
Old 12-18-2010, 04:13 AM
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If the manifold has a vac leak at idle, it will keep it from going into boost.

This isnt rocket science, something is leaking on your intake manifold. The BOV is just an effect of your jacked up vac situation
Old 12-18-2010, 09:08 AM
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Originally Posted by XtremeDime
If the manifold has a vac leak at idle, it will keep it from going into boost.

This isnt rocket science, something is leaking on your intake manifold. The BOV is just an effect of your jacked up vac situation
thats what i thought... its boosting now one of the cold side pipes wasnt tight

but i still have a high idle i think im giong to throw an ls6 intake on or change the iac and see wat that does, i tried to manually control the iac in hptuners adn that did nothing. so i dont knw where else to go from there
Old 12-18-2010, 12:26 PM
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Keep it simple. Disconnect the charge pipe and fix your high idle.

Do you have A/C?
Old 12-18-2010, 06:57 PM
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no a/c cobra, what do you mean charge pipe? how does the iac work does it need to function off free air in the manifold or jus in the t/b?
Old 12-18-2010, 07:58 PM
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Charge pipe = cold side piping.

Have you checked all your lines for vacuum leaks yet?
Old 12-19-2010, 12:31 AM
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yes i checked all the lines everythings good. how possible is it for the iac?



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