if you have a compressor or a friend who owns a compressor you can make a boost leak tester very cheap... about a foot of 2 1/2" pvc pipe, 90degree bend, another 4-6". on one end have a coupler, on the other end a tap for a air hose to pressurize it... then hook it up, compress it and there you go.

 

sounds like thats what I have todo. thanks.

 

it's not hard at all... with all of the components you are looking at probably 15-20bucks most.

 

Well, aren't you talking about turbo whine? Isn't some of this acceptable? My stock T-25 whines when it goes into boast and most mechanics say thats normal. To me thats the sound a turbo charged car is suppose to make. Also, if you have a boast gauge see check to see how it makes boast - does it go over the target then go back down or go over. These are tell tale signs that you have spiking or creep. For me when I had a leak, there was a noticible drop in power.

 

Im pretty sure its a boost leak. The car started making the whistle about 6 months after I bought it. One day that whistle just showed up, and my car lost some power. My girlfriend even noticed that the sound was different than normal.Now there is a very big drop in power, my a/f gauge goes to 10.0, my boost gauge goes to about 20psi, which istoo high, and will buck if I push it, which I belive is fuel cut.

 

I talked to my mechanic, he said a throttle body plate was slightly melted, but he didn't know how it could happen since it is aluminum, possibly causing a leak. Maybe the compressed air was hot enough to melt aluminum? Anyone ever heard of this before?