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cannot boost over 15psi!!!!!

suzook

Member
Went to the track last nite and noticed that the boost will not go past 15psi..no matter how much I adjust the wastegate..I have the gate adjusted all the way in and it still only hits 15..And seems to drop off to about 12 during a run..I have a R/A93 chip in it..And was running 100 octane with .7KR on scanmaster..What would be the cause of the limited boost and not being able to hold a steady 15.....Any Help greatly appreciated...Thnx Shawn.TTA #343..Oh yeah...fp set @45 line off...Did have a very lazy o2 sensor decided to die last nite...highest # i saw on o2's were 500...The car has a ta-49...009's Atr downpipe and cat back test pipe with dump..k&n filter
 
Suzook,
The first thing that I would do is check the condition of the wastegate diaphram & the condition of the vacuum hoses that have the restricter in them (the Y hoses that go to the turbo & wastegate). The only other thing that I suspect could be the culprit is the wastegate solenoid, located on the passenger side of the motor next to the right valve cover, Basically the computer uses it to bleed off the boost. Give those things a try and see what you find. Good Luck. :D :D :D
 
Suzook :cool: ,
I believe you have a faulty wastegate diaphram :mad: . The vacuum hoses are fine though, trust me! I experienced the same problem a few weeks back when I brought my car to the track. Good luck fixing the problem. ;)
 
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