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Why doesnt my boost leak test work?

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bob123131

15+ Year Contributor
457
2
Dec 20, 2004
winona, Minnesota
So i tested car the abotu a motnh ago and was leaking at bov flange and bov screw on top. Fixed them no biggy so my car started lagging real bad and just not acting right so i figured i had a leak. Went to test them and put in 15psi first heard nothing. Then 20 psi heard nothing. At this point i took out bov screw no pressure came out took off upper ic pipe no pressure. Does this mean i have a leak osmewhere that is leaking faster than my air sompressor can push air? Is there somehtign wrogn with my turbo so that its not letting me push air through. Sorry but im not the biggest news and yet i cant find anything on what this could be?
 
bob123131 said:
So i tested car the abotu a motnh ago and was leaking at bov flange and bov screw on top. Fixed them no biggy so my car started lagging real bad and just not acting right so i figured i had a leak. Went to test them and put in 15psi first heard nothing. Then 20 psi heard nothing. At this point i took out bov screw no pressure came out took off upper ic pipe no pressure. Does this mean i have a leak osmewhere that is leaking faster than my air sompressor can push air? Is there somehtign wrogn with my turbo so that its not letting me push air through. Sorry but im not the biggest news and yet i cant find anything on what this could be?
Try spinning the turbine with your hand. See how much shaft play you have.
 
Check the throttle body for missing screws, found one missing the other day and made a noticeable difference.
 
bob123131 said:
Went to test them and put in 15psi first heard nothing. Then 20 psi heard nothing.
Does this mean your boost gauge was reading 15 and 20 psi or that's what the regulator on the compessor was set to?

If it was measured at the boost gauge, did it stop accepting air from the compressor or was air still running into the system?

Steve
 
Yeah i didnt think abotu that. Its what the air compressor is saying i didnt think about the fact my engine is prolly little larger than air compressor or at least diff size. I ordered a autometer boost gauge , egt, and air fuel last night. So i will have those in liek a week. So lets jsut say i have no boost leaks what else could make me accelerate slowly car makes a funny smell at times and i always stop and try and figuere it out but can never smell it once car has stopped. Checked plugs didnt loko to bad gapedthem and stuff. Checked exhaust manifold no cracks. I need soem ideas on where to start looking from here. O yeah checked turbo and everythign looks great little shaft play if any.
 
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