Turbo Randomosity

simbey1982 · Post by **simbey1982** » Tue Jan 17, 2006 8:00 pm

Hello all,

I Have been building up my SS to boost properly. Have a WRX IC. Using a Stock WRX BOV recirculating. Boost gauge. Fuel Cut defeater. The only thing im wating for is the boost controller. Here is my issue though.

85% of the time its boosts fine. in about the 5 psi range .34hKpa
Then at random intervals i will get 15psi or 1.08hKpa in every gear 1st through 5th.

What could be wrong. My only thought is the wastegate is sticking. Is there a way to oil or grease the joints?? Anything else it might be?

Cory

simbey1982 · Post by **simbey1982** » Thu Jan 19, 2006 1:19 am

nobody?

Project_Legacy · Post by **Project_Legacy** » Thu Jan 19, 2006 4:54 am

did you try your idea? i cant seem to think of anything else if its as random as that.

simbey1982 · Post by **simbey1982** » Thu Jan 19, 2006 8:12 am

I was also thinking, that it may be the factory boost "controller" if there is such a think or maybe its a shutoff solenoid or something....anyhow could that be causing it?

Cory

sammydafish · Post by **sammydafish** » Thu Jan 19, 2006 4:38 pm

The boost solenoid could be sticking closed and causing your problem. I'm pretty sure that it would through a code if that happened though, but maybe not. You might want to disconnect the actuator and just move the wastegate by hand, see if it binds up. I've seen cases where the little arm on an internal gate would get bent and bind up.

If your solenoid is bad you could just run a MBC until you get a new one.

napphappy · Post by **napphappy** » Thu Jan 19, 2006 9:36 pm

I have an extra factory boost soleniod if you want to try it out.

If you think it might be the wastegate sticking, just run a line straight from your intake manifold to the wastegate actuator. If it is still randomly over boosting its probly not the solenoid.

PM or e-mail me

555BCTurbo · Post by **555BCTurbo** » Thu Jan 19, 2006 11:24 pm

simbey1982-

Whereaboots in Oregon are you...I also reside in this great state!

hit me up!

simbey1982 · Post by **simbey1982** » Fri Jan 20, 2006 5:39 pm

Hey Napp,

Sent you a PM, I think i want to try that solenoid and give your wastegate test a whack. Thanks for all the help guys i will report back when its fixed

Cory

Project_Legacy · Post by **Project_Legacy** » Sun Jan 22, 2006 6:49 pm

i thought usually when the solenoid was bad it would only let you see 5psi as that is the "default" when something is wrong with it. just a guess...

georryan · Post by **georryan** » Sun Jan 29, 2006 12:47 am

Have you tried running the hose directly from compressor to wastegate...taking the boost control solenoid out of the loop? Try that and see if you have any problems. You can sometimes isolate the wastegate being a problem that way. I did at least.

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Turbo Randomosity

Turbo Randomosity