Boost leak test... WTF?!?
#32
Evolved Member
iTrader: (38)
I wasn't meaning it to flame you sorry. Obviously air still gets into the IM. Or you car wouldn't idle point is your cutting back a lot of air gettin in fast not having the TP open. You can only get 2psi into the car air is not blowing past both valves no way.
I have also never put any turbo car to TDC before doing a boost leak test.
I have also never put any turbo car to TDC before doing a boost leak test.
#33
EvoM Guru
iTrader: (6)
Turning the engine until two cylinders are at TDC is not the way to conduct a pressure test. One of those two will be at overlap, and that means both intake and exhaust valves will be open. That creates a big leak. The best position for the engine is with #1 at 90 deg from TDC.
At that point, the most substantial leak is across the throttle plate depending upon the IAC stepper position at shutoff.
#37
Evolved Member
if im not mistaken when u do a boost leak test arent u supposed to plug the lines going to the wastegate to prevent it from opening??? just my 0.02 not a "guru" like a lot of u peepz on here but i know a fair amount about cars...
#40
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Join Date: Aug 2009
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im having a similar problem right now. ive checked everything, and it will only build pressure to 6 psi. i can hear it hissing out near the stock BOV... but it should be holding much more than 6psi. if its not the BOV, its right below, but everything seems tight and i cant feel anything. bummer