Help Analyse Boost Pattern

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Jun 20, 2002 | 05:29 AM

chachidu

Thread Starter

Full Member

Joined: May 2002

Posts: 52

Likes: 0

From: Modena, Italy

Help Analyse Boost Pattern

First turbo (8.5 to 10 Psi)
Transition (5.5 to 7 Psi)
Second Turbo (8-9 psi always) with boost gauge needle shaking.

I think the first turbo is fine. it just reacts differently depending on how the acceleration starts...i.e. sudden as opposed to gradual. Gradually it gets up to 10 psi usually...randomly flooring it it gets up to like 8.5...the transition seems a bit low and obviously the second turbo is not up to par cuz it never gets to 10psi. What could be causes?

Jun 20, 2002 | 06:21 AM

Dont_Be_A_Rikki

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Posts: n/a

Well it is the SEQ system it is a bitch sometimes but with that said! Have you done a ty-rap job(replace the vacuum hose)? if not do it soon so you can get the b.s stuff out of the way and while you are doing it test all the solenoids while you are down there or it is like 1/2 assing it

and after that tell us your results.if you need help on doing the job check out this site
www.rx7turboturbo.com and it will help you greatly!

-Rikki

Jun 20, 2002 | 07:01 AM

mmaragos

Senior Member

Joined: Sep 2001

Posts: 597

Likes: 1

From: Windsor, CA

Check the basics too.

Are you still running a precat? If yes, depending on age and usage, it may be getting plugged.

Are you still running a cat? If yes, depending on age and usage, it may be getting plugged.

With the boost gauge needle shaking, that could indicate a boost leak. Check the coupler between the y-pipe and pipe to the intercooler. Check all of the intercooler piping to make sure that you do not have any leaks.