please help with vacuum leak
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From: Sarasota/Bradenton, FL
please help with vacuum leak Im pretty sure I have a vacuum leak. That seems to fit all the symptoms. Im hearing a hissing noise coming from the engie and have a surging idle.
I havent't really noticed any problems performance wise, but i wouldnt really know as ive only had the car about a month and its had the leak the whole time. Its still got plenty of pickup
, but it is the fastest thing ive ever driven so again i wouldnt know lol.
It sounds like its coming from the front of the intake, not necessarily from the intake but in that general area. The car is a 94 with an ls1 swap from a 98. He said he removed all the smog stuf and the abs is not connected.
how do I find out where the leak is? are there any common areas to check?
any help would be appreciated
I havent't really noticed any problems performance wise, but i wouldnt really know as ive only had the car about a month and its had the leak the whole time. Its still got plenty of pickup
, but it is the fastest thing ive ever driven so again i wouldnt know lol.It sounds like its coming from the front of the intake, not necessarily from the intake but in that general area. The car is a 94 with an ls1 swap from a 98. He said he removed all the smog stuf and the abs is not connected.
how do I find out where the leak is? are there any common areas to check?
any help would be appreciated
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
You said it seems to be coming from the front of the motor..... Is the air bellow slipped correctly onto both the throttle body opening and MAF opening, and the clamps properly snug? Is the TB itself fully torqued onto the intake? Also check that the PCV line on the passenger side of the intake is properly seated, as well as the fresh air line on the top passenger side of the TB.
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From: Sarasota/Bradenton, FL
Originally Posted by philetus
Get a can of carb cleaner and spray it around the engine, with the eng. running. If theres a vacuum leak, you'll find it quick.
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From: Schiller Park, ILL Member: #317
Originally Posted by phillyz28
i have a vacuum leak too.. just found mine right after the throttle body... just got my car a few months ago too. whats the best temporary way to fix the leak? its a small hole
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Verdad Gallardo ummm not really sure... its a small rubber tube, maybe about 1/2 inch in diameter and it shoots off to the left then connects to somethin else then that thing goes back toward the firewall
Originally Posted by phillyz28
ummm not really sure... its a small rubber tube, maybe about 1/2 inch in diameter and it shoots off to the left then connects to somethin else then that thing goes back toward the firewall
Sounds like PCV hose.
Hawk
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From: Schiller Park, ILL Member: #317
Originally Posted by 227Hawk
Sounds like PCV hose.
Hawk
Only thing on the front left side of the intake is the EVAP line. But that's hard plastic (not rubber).
Probably is a PCV line or the fresh air line on the top of the TB going to the valvecover.....
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
So is the hole in the rubber line that runs from the top of the throttle body to the passenger side valvecover? Or in the line that runs from the passenger-front side of the intake all the way behind the intake?
You can get replacement PCV system parts either from the dealer or you could patch something together with PCV line and plastic couplers from most autoparts stores.
You can get replacement PCV system parts either from the dealer or you could patch something together with PCV line and plastic couplers from most autoparts stores.
another thing that might help.... i went to autozone to pull codes b/c the SES light has been on and here is what came back... 6 codes, maybe #3 has somethin to do with it..
1. system too lean bank 1 po171
2. system too lean bank 2 po174
3. EVAP emission control system leak small po442
4. Idle control system RPM high po507
5. system too lean bank 1 po171-PD
6. system too lean bank 2 po174-PD
also here is a pic of where the leak is:
sorry for the crappy pic, its from my cell phone.. the leak is right in the center of the pic. i tried to tape it up (its the refective surface u see) to see if my SES light would go away but obviously i have a lot more going on then just the leak. its isn't the tube that comes out across the top of everything but its the shiny part beneath it. Sorry for my noobieness by the way
1. system too lean bank 1 po171
2. system too lean bank 2 po174
3. EVAP emission control system leak small po442
4. Idle control system RPM high po507
5. system too lean bank 1 po171-PD
6. system too lean bank 2 po174-PD
also here is a pic of where the leak is:
sorry for the crappy pic, its from my cell phone.. the leak is right in the center of the pic. i tried to tape it up (its the refective surface u see) to see if my SES light would go away but obviously i have a lot more going on then just the leak. its isn't the tube that comes out across the top of everything but its the shiny part beneath it. Sorry for my noobieness by the way
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From: Tyler, TX.
Thats your pcv valve. Just get a small piece of hose from your local auto parts store the same size and length that is going from the pcv valve to the intake and a new pcv valve while your there and all your problems should go away.
PS: The pcv valve is the shiny metal contraption inside that hose that you taped up.
PS: The pcv valve is the shiny metal contraption inside that hose that you taped up.
there was nothing inside the hose i taped up... it was just hollow rubber but ill stop by the store and check it out. i know its a stretch but do u have any idea what part number or that would be?