Just about had it with my turbo need help plz

[JDMMA70]

So i posted a few threads about me not being able to control my boost so this past thursday i took off the intake and checked every vacuum hose and every boost refrence lines and even made sure that the boost controller was set up right (GReddy Profec B V.1), everything was "A" o.k. So i then made sure the boost controller was getting proper power and even regrounded it. So then i was told to try a simple test and to bypass the boost controller solenoid box all together which i did, and it still acted the same would overboost and hit fuel cut like crazy. So now im thinking its my wastegate, but before i go off and spend $200 on a new GReddy P765 actuator i want to know is there anything else i should look for before i spend this money. Also would i be able to change the wastegate without removing the turbo?

Mods that relate to the turbo:
GReddy TD06H-20G (Came with car)
GReddy Type S BOV (Came with the car)
GReddy PRofec B V.1 (Came with the car)
Defi Boost Gauge (My vacuum at idle while in Park is about -16mmHg id say.)

Sigh
Thanks
~JDMMA70

 

[suprahero]

Can you put 15psi of air to the turbo and see if the wastegate opens like it should. I used my air compressor and had to do this on my wife's turbo last year. I found out that the wastegate was opening properly, but it wasn't closing all the way, so our problems are a bit different.

 

[JDMMA70]

I dont have a compressor at all, so i cant do that test. Im really stumped on why the car is doing what its doing,

 

[suprahero]

If it's spiking with and without the boost controller then I would say your wastegate is stuck shut.

 

[JDMMA70]

If it's spiking with and without the boost controller then I would say your wastegate is stuck shut.

Aww hell those things arent cheap, sigh oh well can i install one without removing the turbo?

 

[Supraboy89]

you can also test your boost controler with a air compressor to make sure it is sending pressure to your wastegate.

 

[JDMMA70]

will i be able to change wastegates without removing the turbo

 

[shaeff]

That turbo is internally gated, correct? If so, it should be setup quite similarly to stock, in which case, you shouldn't have to pull the turbo to change out the 'gate.

 

[Zumtizzle]

Seems Like it.

 

[IwantMKIII]

screw the greddy replacement. I almost had to replace mine for the $200 piece, instead i used this on my profec b spec II

http://www.perrinperformance.com/products/show/64

 

[Jaguar_5]

He's talking about the wastegate, not the boost control solenoid

 

[JDMMA70]

Any replacement wastegates, I can get besides the greddy unit? Wastegates similar to the Greddy Unit

 

[IJ.]

Got a pic of the actuator that's on the Turbo now?

 

[Zumtizzle]

It's a Mitsubishi Heavy Industries turbo. Banks (the diesel tuner uses the Mitsubishi Turbos.), and might be able to help you. You might wanna contact ATS, they're known for the upgrade in the link posted, and might have a few wastgates laying around. Assuming the MR2 uses the same gate.

http://www.atsracing.net/ats_greddy_upgrade_kit.htm