dwonpipe and exhaust cause problem?

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jefferson
Third Gear
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Joined: Sat Dec 16, 2006 4:41 am
Location: Parkville, Mo.

dwonpipe and exhaust cause problem?

Post by jefferson »

Why would adding a downpipe and exhaust cause a car to detonate and run real funny when on boost? I have the stock turbo and running stock boost. The only thing I have thought is maybe the injectors need a good cleaning and the car is running lean. Any thoughts?

Jeff

I have replaced the knock sensor too with initial good results but now it seems to be going back to the way it was, but not as bad.
91 Black SS 5spd. Edm lights, wrx gauges in dash, 45 degree airbox, cryoed drilled and slotted brakes. Invidia divorced downpipe with custom stainless exhaust. To be installed, aluminum a-arms, manual belts, awic.
dscoobydoo
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Post by dscoobydoo »

Reset the ECU.

Then go for a good drive.

And what octane are you running?
Yes I have too many Subarus
No you can't have one
05 GD-STI
01- RS- Swapped-07 STI
00- GF
93 SS- "the original Robtune" (now in new hands)
BXSS
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Post by BXSS »

+1 Reset!
94 Legacy SS
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jefferson
Third Gear
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Joined: Sat Dec 16, 2006 4:41 am
Location: Parkville, Mo.

Post by jefferson »

91 octane is about all you can get here. I will reset and see how it does.

Thanks, Jeff
91 Black SS 5spd. Edm lights, wrx gauges in dash, 45 degree airbox, cryoed drilled and slotted brakes. Invidia divorced downpipe with custom stainless exhaust. To be installed, aluminum a-arms, manual belts, awic.
jefferson
Third Gear
Posts: 768
Joined: Sat Dec 16, 2006 4:41 am
Location: Parkville, Mo.

Post by jefferson »

Seems to be better, but still not perfect. Still runs alittle funny when the boost first comes up and then clears out. When I hear the thing gargle I know now that it is the knocking. Couldn't hear it until I had the windows down and a barrier to reflect the noise back at me.

Jeff
91 Black SS 5spd. Edm lights, wrx gauges in dash, 45 degree airbox, cryoed drilled and slotted brakes. Invidia divorced downpipe with custom stainless exhaust. To be installed, aluminum a-arms, manual belts, awic.
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