Like the topic says, i have a weird boost problem. On my first gear, my first turbo kicks in, and after... nothing, no boost, then i shift to 2nd gear and full 10-8-10 boost pattern....

anyone could have an idea of where is the problem coming from?

any advices would be appreciated.

Thanks

Max

 

When I had my twins I never saw the 2nd turbo boost..

 

hum lol .. ok but it doesn't help me much

 

http://www.autosportracetech.com/RX-...leshooting.htm

Scroll half way down.

 

I think the turbo control solenoids are a common culprit for this behavior.

Dave

 

i had a similar problem once. check the 2 vac hoses under the crossover pipe as well as the above solenoid. also check the 2 rubber hoses that go from the turbos to the bov/crv.

i never did find the exact solenoid that would fix this, but did resolve the issue by replacing those 2 vac lines, new turbo control solenoid, 2 new rubber hoses and a Profec boost controller.

 

hum, i just installed a profec-b on my car ... before installation, my 2nd turbo worked on the first gear ...

Max

 

sounds like one of your check valves to the vacuum chamber either broke or popped off. Start in second gear and go WOT at speed, see if you get 2ndary boost...if no boost, shift to third and I bet you get 2ndary boost in the next gear due to the vacuum you create instead of stored in the chamber.

 

Good call on the check valves. I was going to mention that.

 

thanks i'll try that

 

Oh yeah, solved the problem, one of the hose near the UIM was twisted, damn the car spools so nicely now.

thanks guys for all

Max