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Old 03-30-2005, 01:57 AM   #1
Scooby Newbie
Member#: 62083
Join Date: May 2004
Default throttle delay?

I have a 2003 wrx with the stage 2 ap. Is it normal to have the car's ecu still feed gas even though i've completely set my foot off the gas pedal for a quick 1/5th or so of a second? I'll let off the gas completely and it seems that the ecu is still feeding gas to the engine. Yes this makes the car run "smoother" without the jerkiness, but it also makes my bov flutter. Thanks
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Old 03-30-2005, 02:34 AM   #2
Scooby Specialist
Member#: 20773
Join Date: Jul 2002
Chapter/Region: SCIC
Location: Los Angeles, CA
2002 WRX
Midnight Black Pearl


i notice it sometimes, when you let off the gas, the car is still revving. happens during shifts, too. i've read about other people having the same issue.

im on cobb stg 2 as well
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Old 03-30-2005, 02:40 AM   #3
Scooby Newbie
Member#: 62083
Join Date: May 2004

yes, that's exactly what i'm experiencing. Is there a fix to this?
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Old 03-30-2005, 03:28 PM   #4
Scooby Specialist
Member#: 56468
Join Date: Mar 2004
Chapter/Region: NWIC
Location: Seattle, WA
04 Improved STI
Dirty White


It's called "fuel cut" and it makes for a smoother, albeit fuel eating experience. There should be a way to shut it off, there is in the Hydra EMS.

There is also "dynamic enleanment" that occurs when the throttle is suddenly shut. If you don't have any enleanment (read a slight fuel flow delay) you car will buck like a mofo when off throttle and low RPM. This caused by a feedback between the transmission and the engine, which are of course coupled together when in gear. you want some "dynamic enleanment". Too little it bucks, too much it backfires.

Good luck finding out how with the AP, I can't help you there.
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