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Funny Boost Issue, Posibly Vct Related

WogsRus

By WogsRus,
in Engines & Forced Induction

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WogsRus Veteran

WogsRus

Posted
Posted

Ok so yess my car always seams to have an issue, well more likely it is just me.

Some time ago, my car started exhibiting strange surge/stumble at low rpm opening and high boost, say 12 psi at 3000 rpm, this is with teh gizzmo boost controller.

NOW went to my mechanic, after i spent 4 months looking for issues, and couldn't get anywhere. Was told it was my coils, new splitfires. So i had them sent under waranty for check, subsequantly they were found to be faulty, 4 off, and replaced with a new set.

So i installed these last night, all well and good, but the car seams to strugle with boost not, well not strugle, but below 4500 rom, i will not see more then 10 psi, R32 actuator, and then abve 4500 rpm, the boost goes up rather fast to preset boost setting on the gizzmo.

Now i think my car feels flat below the 4500 rpm range, so perhaps my VCT is not working, allthough consult does not report a fault, is there any way to check the VCT other then unpluging it and see if it makes a differance.

What else could couse this issue?

Thanks, and please this is rather urgent, as i need to get my car soughted before the new turbo goes on.

TA

joeyjoejoejuniorshabadoo Grand Master

joeyjoejoejuniorshabadoo

Posted
Posted (edited)

Are you running a bleed value off the return hose from the stock boost solenoid? This would hold at the 32 actuater's limit until after 4500 rpm when the computer opens it then you would get whatever your bleed value is set to

Edited by joeyjoejoejuniorshabadoo
WogsRus Veteran

WogsRus

Posted
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Posted

NOPE I HAVE A GIZZMO, dam autocad caps, i have a gizzmo boost controller with it's own new solenoid, seup worked fine 9 months ago, then somethign went funny, no idea what, no one can find it yet, so sarching for some anwsers.

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