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Old 08-07-2005, 09:14 PM   #1
rbmour
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Member#: 45225
Join Date: Oct 2003
Location: Cincinnati
Vehicle:
2003 wrx
pearl blue

Default Bad not to have exhaust heat shields? my cars running horrible.

Is it bad not to have exhaust heat shields, my cars running horrible:

My wrx is a 2003 2.0

I have a cobb stage 2:

down pipe and accesport.
did not put the heat shields back on didnt fit, heard have to trim, no prob.
turbo xs type h blow off valve.
but...my car is all of a sudden running like crap.

it is really slow and seems to lack a lot of hp, turbo doesnt seem to want to go above 0 (on factory boost gauge) unless i floor it. and if i remember right is pulling back (low) (farther to the left) then normal (back pressure?)

also if i hold first gear slowly and let it climbs in rpms slowly it dies at the end.


what is causing my problems? the heat? the hot air going in my intercooler from lack of heat shields and fried my turbo for running it with out cold air for a while? by the way put the equipment on 2 months ago. i am totally guessing, i dont know much or anything really about cars.

please help me!

Ryan cincinnati oh
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Old 08-07-2005, 09:18 PM   #2
Mulder
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15 WRX/05 GTO

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Zero boost? First thing to check is the wastegate linkage to see if it's disconnected. The c-clip can fall off causing the arm to separate from the actuator link. Should be easy to see since you don't have the heat shield.
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Old 08-07-2005, 09:31 PM   #3
rbmour
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ok. i checked. and if im right your talking about the area where i had used to have my manual boost controller.

the tubing looks together and tight. BUT i cant tell for sure. i think the part
where it connects to the little nozel off the right after the waste gate splitter is connected at the end of the nozel, is it suppossed to go all the way over it?


what else could it be???

Ryan
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Old 08-07-2005, 09:32 PM   #4
rbmour
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let me be a little more specific also:

its not actually running horrible, just terribly slow.

Ryan
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Old 08-07-2005, 09:36 PM   #5
Mulder
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No, I am referring to the mechanical linkage for the wastegate, not the boost controller hoses. A problem with the hoses will not give you zero boost, but a problem with the wastegate linkage will. You can refer to this thread, with pics-
http://forums.nasioc.com/forums/showthread.php?t=807255
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Old 08-07-2005, 09:37 PM   #6
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He wasn't talking about a hose. He was talking about the linkage on the actuator that opens and closes the wastegate. It's the part on your turbo that looks like a canister with a rod sticking out of it that connects to the exhaust side. Heat shields will not cause you to not get boost. They would cause your under hood temps to be higher.
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Old 08-07-2005, 09:38 PM   #7
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Sorry you beat me to it.
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Old 08-07-2005, 09:41 PM   #8
rbmour
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ok good ****.

c clip is connected but when reving the engine linkage does not move,
should it?


thanks,

Ryan
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Old 08-07-2005, 09:45 PM   #9
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It will move only when you build boost. It opens the wastegate flapper to let out exhaust to control the amount of boost. when you reach the stock boost level it will open.
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Old 08-07-2005, 09:45 PM   #10
Mulder
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Not while the car is in neutral. If the linkage is connected, other possibilities are a stuck-open wastegate or a seized turbo. You can check both by disconnecting the downpipe, with it off you can see if the wastegate is fully closed and also check the turbo to see if/how it spins. You can also check the turbo by disconnecting the inlet hose and trying to spin the turbine from there.
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Old 08-07-2005, 09:47 PM   #11
rbmour
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ok so when i rev it in neutral and the blow off valve goes off wouldnt i see it move?

ignore this- i just read the last thread.
Ryan
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Old 08-07-2005, 10:34 PM   #12
rbmour
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pearl blue

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yeah, it seems fine.
(the c clip etc..)

what else are we looking at, what else could i check etc..

Last edited by rbmour; 08-07-2005 at 10:54 PM.
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