So...whatcha think is the problem?

555BCTurbo · Post by **555BCTurbo** » Wed Oct 17, 2007 5:37 am

Alrighty...here is the scenario...

My VF8 (which I bought JDM...so it really doesn't have much in the way of mileage on it) has started to act up.

It doesn't sound any different than it did before, and it isn't full of oil inside, nor am I seeing any smoke from the exhaust...

BUT...

to make anything more than 6psi of boost, I essentially have to have my boost controller completely closed...so the actuator is not seeing any reference from the compressor housing of the turbo.

So...do you think my turbo is dying? Or is it just that my wastegate actuator needs an additional spring to hold it shut...

Also...as is common with VF Turbos (or at least from what I have seen) my wastegate flapper is loose on its arm...so that it rattles when you open the wastegate by hand...so do you suppose it could be leaking out exhaust and subsequently making it so my turbo can't do diddlysquat?!?

Fanks for your help in advance!

dzx · Post by **dzx** » Wed Oct 17, 2007 7:37 am

sounds like a problem with the wastegate.

Dynamic Entry · Post by **Dynamic Entry** » Wed Oct 17, 2007 8:50 am

Fanks is funny

n2x4 · Post by **n2x4** » Wed Oct 17, 2007 2:28 pm

555BCTurbo wrote: Also...as is common with VF Turbos (or at least from what I have seen) my wastegate flapper is loose on its arm...so that it rattles when you open the wastegate by hand...so do you suppose it could be leaking out exhaust and subsequently making it so my turbo can't do diddlysquat?!?

My VF8 has a loose flapper too. Clanks a bit but works fine.

92ss satinsvoice · Post by **92ss satinsvoice** » Wed Oct 17, 2007 10:10 pm

hay nick hows the shaft play? it might be seizing up. rubbing on the housing.

Adam West · Post by **Adam West** » Thu Oct 18, 2007 1:07 am

If I remember right Dscoobydoo had a small nick on one of his blades and his TD05 wouldn't hold boost...DR do I have that right?

555BCTurbo · Post by **555BCTurbo** » Thu Oct 18, 2007 3:14 am

92ss satinsvoice wrote:hay nick hows the shaft play? it might be seizing up. rubbing on the housing.

Last time I checked, it was fine...and if it was rubbing it probably wouldn't sound exactly like it did before...

The Turbo is coming out on Friday...and I might weld the wastegate flapper and see aboot shaft play and whatnot.

AWD_addict · Post by **AWD_addict** » Thu Oct 18, 2007 6:44 am

My guess is it's the loose flapper. A stronger spring could help, or it could way overdo it. Try fixing the flapper first.

douglas vincent · Post by **douglas vincent** » Thu Oct 18, 2007 6:57 am

Boostleak ftw.

Do a boost pressure test

Saskatoon Subaru · Post by **Saskatoon Subaru** » Sat Oct 20, 2007 4:50 am

Well this sounds like something that i just ran into at work today, now i know this won't be the exact same setup seeing how i work on school buses and diesel but it might help, anyway this GMC 3500 was lacking power, to after checking the turbo to make sure it was good, we then thought it may be the wastegate, we found the wastegate wasn't getting vacuum to hold it closed to allow boost to build. we traced it back to a solenoid that wasn't sending the signal to open and close the vaccum to the wastegate, anyway replaced the solenoid and good as new.

hope that wasnt to long, hope it help, if not o well

legacycentral bbs

A forum for 89-94 BC-BF(BJ) Legacy Owners and Fans

So...whatcha think is the problem?

So...whatcha think is the problem?

Re: So...whatcha think is the problem?