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Only showing 7 lbs of boost, vacuum leak? ?
My boost gauge is only registering that I'm running 7lbs of boost. When I thought my stock 03 WRX should run 12 lbs? if it's a vacuum leak does anybody have a vacuum line diagram? I need help so I can get er back up to 12!!!!!
asked in Engine and Engine Management
/ Lines
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2003 Impreza WRX
at 07:37pm on Jan 12, 2012.
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Answers (4)
I was having the same problem not too long ago.. Found that one of the boost lines running from the wastegate to the boost Selinoide was cracked pretty good. I decided to just replace them all :)
07:51pm on Jan 12, 2012
Here is a good start so you can understand how it all works. It has helped me a time or two. Good luck.
http://www.cobbtuning.com/info/?ID=3482
http://www.cobbtuning.com/info/?ID=3482
11:02am on Jan 13, 2012
check for vac leaks ... and you should be more close to 14 lbs of boost .
02:38pm on Jan 18, 2012
+1 to all answers here. It does sound like a vacuum leak to me. An easy way to find out is to use some needle-nose pliers and just pinch lines until you see the proper the in/Hg (negative) vacuum. If you don't have a gauge that goes negative, pinch off other small vacuum lines working your way from the gauge line to the manifold. If none of the vacuum lines are loose/broken/bent/sealed/etc... You're looking at serious turbo shaft play or failing turbo.
I hope this helps!
I hope this helps!
02:34am on Jan 23, 2012