wastegate actuator

[acroadam]

i have searched...and i still dont know what a wastegate actuator does, or when the wastgate is of need of replacement...thanks for all the info.. i wanna learn all i can about this car..thanks

 

[orng1]

i have searched...and i still dont know what a wastegate actuator does, or when the wastgate is of need of replacement...thanks for all the info.. i wanna learn all i can about this car..thanks

The actuator controls the waste gate swing arm. If it's leaking or broken it needs to be replaced. Some tear and wont open the wastegate and others stay stuck part open so you aren't able to make boost. That's how mine was. I'd make 1-2psi at redline under full throtle.

 

[turbobst]

http://www.streetracersonline.com/articles/turbo/wastegate.php

(google)<-------------is my best friend!

 

[acroadam]

awesome thanks a lot...well im having trouble with my msp...when i full throttle, it gives me my 9psi that i have set, when i shift, to thrid, it doesnt want to give me power, its like i have to start over again(it doesnt like bogg down, it seems like it wont keep the car full power when shifting).....i hope this makes sense..and i was thinking maybe its the wastegate...but it still gives me my 9psi...

 

[AtenzaNY62]

can we use an external wastegate? since so many people run into problems with the wga

 

[turbobst]

awesome thanks a lot...well im having trouble with my msp...when i full throttle, it gives me my 9psi that i have set, when i shift, to thrid, it doesnt want to give me power, its like i have to start over again(it doesnt like bogg down, it seems like it wont keep the car full power when shifting).....i hope this makes sense..and i was thinking maybe its the wastegate...but it still gives me my 9psi...

Has it been doing this for a long time now?
Do you have the stock turbo on or an upgraded one?
After market waste gate or stock?
Might have boost leak?

 

[acroadam]

it just started doing this...and i do have a boost guage, so i dont see a vac leak...(if thats how you can tell if there is a boost leak)....its a stock turbo...my upgrades are: highboost FMIC, greddy profec-b boost controller, injn cold air intake, aem air to fuel ratio wideband, and boost gauge....for the wastegate, i dont know if its aftermarket. i just bought this car a couple wks ago.....but it has been cold here latly....but there is one thing i do notice that it does sometimes, is that if im full throttle it, before i shift, it just feels like i let my foot slip off the gas pedal, and pops real hard, i have know idea what that can be...but it dont do it everyday....any clue?

 

[turbolife]

it just started doing this...and i do have a boost guage, so i dont see a vac leak...(if thats how you can tell if there is a boost leak)....its a stock turbo...my upgrades are: highboost FMIC, greddy profec-b boost controller, injn cold air intake, aem air to fuel ratio wideband, and boost gauge....for the wastegate, i dont know if its aftermarket. i just bought this car a couple wks ago.....but it has been cold here latly....but there is one thing i do notice that it does sometimes, is that if im full throttle it, before i shift, it just feels like i let my foot slip off the gas pedal, and pops real hard, i have know idea what that can be...but it dont do it everyday....any clue?

Take the vac line off the wastegate actuator and blow into it. If you can blow past it, the diaphragm is torn and you should replace the WGA. If you can't blow past it, your WGA is still good.

The wastegate itself (the flapper/swing arm) could still be sticking though...

Make a boost leak tester and check for leaks that way. If you have replaced IC piping and the like you could have a small leak and not realize it.

Boost leak tester - http://www.google.com/search?source...GGLJ,GGLJ:2006-40,GGLJ:en&q=boost+leak+tester

You said it will get 9 psi in 2nd, right? Does it build boost quickly and hold steadily?

 

[acroadam]

it will hold boost, but when i shift, to 3rd, it doesnt hold...and then it goes up again, then when i hit 4th, samething...

 

[acroadam]

can anyone post a pic of a msp engine bay so i can see where the WGA is located at?...thanks a lot

 

[ForceFed]

.but there is one thing i do notice that it does sometimes, is that if im full throttle it, before i shift, it just feels like i let my foot slip off the gas pedal, and pops real hard, i have know idea what that can be...but it dont do it everyday....any clue?

Fuel Cut my friend..Search Fuel cut...Its cold and it sounds like your boosting higher than stock..Your hitting Fuel cut.

 

[turbolife]

Don't have a picture infront of me, does this help?

Look at the vac line that runs to your bypass valve. See the "t" in that? Follow that (if your setup is routed like stock) and that will go to your WGA, which will look somewhat like this...

 

[turbolife]

Fuel Cut my friend..Search Fuel cut...Its cold and it sounds like your boosting higher than stock..Your hitting Fuel cut.

Agreed(mswerd)

 

[AtenzaNY62]

dont most of the people here have fuel cuts whats the easiest way to make it go away?

 

[ItsSlow]

The easiest way is too remove the boost controller or adjust it lower..

 

[acroadam]

thanks for the pic...but it didnt help any....thanks anyway