latest on boost saga

robert weinberg centaurus3200 at
Wed Dec 17 16:53:45 PST 2008

hi mike,

it's an 034 billet bypass. it was installed correctly.

i wish i knew what the stock ecu did but i bought the car with a dead autocheck. boost, trip, etc. i chipped the car while it was still dead.

i developed the boost issues. somewhere in between, i got around to frankensteining a another dash's electronics (that white flip down back panel) onto my dash which fixed the autcheck, et al.

i'm also running samco hoses - any leaky boost and vaccuum lines were just replaced by 034.

there's definitely something screwy going on with the computer and the wgfv. it's reading 1.4 bar like it's not even connected - but it is. 034 tried a known working valve. no change. they measured the correct signal from the computer to the connector.

but something is getting mixed up. and sometimes, it works and the car is a flippen rocket.

help me learn, what is the purpose of the whole WGFV system? to allow the computer to lower boost at high altitude?

from my understanding, that's the only time the computer lowers boost. it does not lower boost during detonation, correct? only pulls out timing.


--- On Wed, 12/17/08, Mike Miller <mikemilr at> wrote:
From: Mike Miller <mikemilr at>
Subject: Re: latest on boost saga
To: 200q20v at
Date: Wednesday, December 17, 2008, 4:39 PM

I forget - has the turbo bypass valve been replaced and is it hooked up
correctly? It is easy to hook up backwards which I believe can limit boost. What
kind of boost does a stock ECU make when installed?


----- Original Message ----- 
From: Chris Miller 
To: 200q20v at 
Sent: Wednesday, December 17, 2008 5:15 PM
Subject: Re: latest on boost saga

I'd hook up a test light (LED) to the wastegate frequency valve (WGFV).
That way you can watch what the computer is telling the WGFV to do.  If I
recall correctly, the LED should light up solid then flash rapidly as boost
builds.  If the light stops flashing or goes off, that means the signal from
the computer is not closing the WGFV and you'll have the 1.4 bar boost max.
Make the lead to the LED long enough and you can stick the LED under the
windshield wiper and watch it while driving (or run it in the window to the

Check the basics, too; grounds; wiring condition at the multifunction temp
sensor; condition of the gear on the end of the distributor.


On Wed, Dec 17, 2008 at 10:42 AM, robert weinberg
<centaurus3200 at>

034 says they GAURANTEE they've checked every flippen sensor or possibility
with the car. at least she did boost for a little bit with my computer. Dan
at 034 said he can believe the ecu going bad - like the pressure transducer
- but what would make for a flakey chip? they are open to suggestions.

200q20v mailing list
200q20v mailing list


More information about the 200q20v mailing list