boosting issues... need help
 

hey,

My car holds full boost for the first sequential turbo, but when it crosses over to the second one, it only holds 5 pounds. When i let off it makes a really weird sound, almost like a turkey call on a BOV. what could this sound be?

i had the same problem, checked for leaks and did all the maintenance work, couldnt find it, now im going single - GT35R - and taking out the rats nest. good luck, i hope you find the source.

boost solinoids either stuffed or one or many vacum line has come off or split.

Here's a Q. I have a RHD rx7 with a apexi gtspec r exhaust intake midpipe still got the big cat. and the car is only boosting 0.5 bars all the way.. I dont feel the SECONDARY turbo kick in... 0.5 all the way to red line... i do have a boost controller but dont really know how to work it yet!!.. or whats it set 2.. i dont think it can be the boost controller bc i dont feel the second turbo kick in so .. any ideas???

like stalkn said...check solenoids. seems like the culprit

You hitting 5psi on the secondary turbo, is your turbo control soleniods... I have the same problem...

secondary seloniod
 

how much does the seloniod for the second turbo cost? is it difficult to replace??

5 psi on the secondary could be a whole host of things. I would replace the check valves first before I go playing with solenoids.

i'd get a used one from another forum member. they about 65.00 new, very pricey

damn... well what the hell could that weird ass sound be comming from?? tommarow im gonna take ye old intake mannifold off and check all of the check valves. if ones not broken then ill try the CRV.

is there a way to check if a solenoid is bad without having to replace it first?