got a buddy of mine that has a FD and he is wondering why he has no boost after 4500 on the gauge he has it reads 1 psi all the way up till redline,defintily feels like it lost power, but still idles and runs fine. any ideas? me myself i am not to familiar with the stock set up and don't know what else to do but to look for vacuum leaks, any other input would be appreciated.
thanks!

 

I had the problem in the past, check if the piping coming from the turbos are connected otherwise you will get no boost. Otherwise, worse case scenario the turbos are blown...

 

Admit it, you bought an FD cause you were tired of driving the "winter shitbox!"

 

FD= factory defect! lol

 

Can you tell us what psi it makes up to 4500? Does he hear any hissing/air leaking sounds above 4500?

First check for boost leaks. Make sure all the couplings from the turbo y-pipe to the intercooler and from the intercooler to the throttle elbow are tight because the clamps can work loose. I'm not sure if it's the heat that does it or what? And as I'm sure you know, one little leak can mean very low or 0 boost..

After that check to make sure you don't have any check valves/vacum lines broken

 

no boost just plain blows *** i feel ur pain, i had no boost what so ever for 2 months before i replaced my trbos. it feelws so pathetic

 

sweet info guys!!! might think about going non sequential!
thanks!

 

I've got the exact same problem, I have like perfect boost until 4500 then it just starts to drop to 0. When the second turbo is supposed to kick in I get a low hummm from the engine area. Anyone got a idea what is it? Cause if not I will probably end up taking it to tripoing engineering.

~alan