I have this weird thing. My secondary turbo boost whenever feels like it.
I checked with my boost gauge and reads .5 and stays there. Some other times goes to .7 and I feel when the second turbo kicks in.
Do you have any idea why some times my turbos work and some other doesn't?

Thanks
Charris

 

http://home.iSTAR.ca/~dvandit/TurboT...shooting.shtml

try that

 

It could be that little chekc valve in the system. Look into it, that was my problem awhile back!