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Old 07-18-2008, 06:31 PM   #1
Superorb
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Member#: 135252
Join Date: Dec 2006
Location: Coral Springs, FL
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2002 WRX Wagon

Default Herky Jerkiness

From 1000-3500 rpms the car is VERY jerky to the point it looks like I can't drive. What could be a possible cause that I can start checking? Fuel filter changed 20k miles ago, plus changed and gapped 15k miles ago, problem started roughly 10k miles ago.

Running XPT Extreme Stg 2 GM BCS map (the one you pay for).

Also have a non-firing condition: http://forums.nasioc.com/forums/show....php?t=1559402
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Old 07-18-2008, 06:35 PM   #2
SedonaScooby
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Default

I kinda have the same problem sometimes where it feels like the clutch is grabbing and slippin and then grabbing during 1k rpm to about 2.5k rpm.

i think its cuz i have a stock clutch and flywheel and need it replaced....so it could be a clutch slip if you know what it feels like, unless your talking like the engine is the problem and not a transmission feel like i have.
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Old 07-18-2008, 08:29 PM   #3
Superorb
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Default

Quote:
Originally Posted by SedonaScooby View Post
I kinda have the same problem sometimes where it feels like the clutch is grabbing and slippin and then grabbing during 1k rpm to about 2.5k rpm.

i think its cuz i have a stock clutch and flywheel and need it replaced....so it could be a clutch slip if you know what it feels like, unless your talking like the engine is the problem and not a transmission feel like i have.
This has nothing to do with the clutch or transmission. It's an RPM-related thing, not a gear-dependent thing.

It does it really bad in 1st gear, less bad in 2nd gear, and hardly in 3rd gear, but ALWAYS at that RPM.
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Old 07-18-2008, 08:39 PM   #4
nhat
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it sounds like you might have a pre-turbo intake leak.

have you tried using the maf tool? or logging a/f learning and a/f correction?
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Old 07-18-2008, 08:46 PM   #5
Superorb
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Quote:
Originally Posted by nhat View Post
it sounds like you might have a pre-turbo intake leak.

have you tried using the maf tool? or logging a/f learning and a/f correction?
I'm not familiar with any of that. Could you explain please?
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