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Old 05-09-2010, 12:49 AM   #1
UncleSpud
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Join Date: Mar 2007
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09 WRX Sedan

Default Sticky Throttle question on Cobb Stage 1 '09 WRX Sedan

I received my AP yesterday, and promptly uploaded the Cobb Stage 1 map (91 octane) to my '09 WRX Sedan. Very pleased with the results--acceleration is smoother, throttle response is more crisp, and the car pulls like crazy from 3500 RPM to redline. The car has every bit as much top end as my previous car--an '06 STI.



Having chipped two vehicles in the '90's (a '93 BMW 325is and a '98 M3), I can tell you that the AP has far greater bang-for-buck than the two Dinan chips I bought. I could barely notice a difference with the chips on my Bimmers--big difference with the Cobb map.


One thing still puzzles me: my '09 has the sticky-throttle issue that's plagued other '09 Rexes. I thought it might disappear with the Cobb map, but it hasn't. It doesn't affect drivability--it's mostly an annoyance as the revs don't always drop when you stab the clutch. That one nit aside, I'm a happy camper.


I wonder if Travis from Cobb Tuning (or others) might weigh-in on this issue?
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Old 05-09-2010, 08:22 AM   #2
arghx7
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I don't think the drive-by-wire dashpot logic has been disassembled much for Subarus, either by Cobb or Ecuflash/RomRaider guys. There must be some routines which control the rate at which the throttle plate closes on decel, but I've never seen any tables in ATR for them.
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Old 05-12-2010, 03:15 PM   #3
BgEzZy
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Does this happen only when coming to a stop with the clutch in?
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Old 05-15-2010, 01:40 AM   #4
UncleSpud
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Quote:
Originally Posted by BgEzZy View Post
Does this happen only when coming to a stop with the clutch in?
Sometimes, but not always.
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Old 05-17-2010, 02:36 AM   #5
BgEzZy
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Mine does the same thing, sometimes revving over 3000 RPM. Took it to the dealer and they told me it is normal. They said it does this in order to achieve zero partial emissions. Not sure if you are having the same issue. But, sounds similar.
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Old 05-17-2010, 10:40 PM   #6
amach1
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Same thing on my (stock) 2010 WRX. It is more a nuisance than anything else and can make you feel like a complete klutz, maneuvering in a parking lot with the revs creeping up to 3,000!

I have learnt to quickly shift into neutral and back again to drop the revs. As BgEzZy suggested, itís probably mapped that way for emissions.

Heck, if Cobb or Perrin can find a fix, it might persuade me to go AP stage 1. Clearly, Subaru hasnít a clue.
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