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Old 04-13-2016, 03:09 AM   #1
Substi555
Scooby Newbie
 
Member#: 259953
Join Date: Oct 2010
Chapter/Region: TXIC
Vehicle:
2005 WRX STi
OBP

Default ECU reset rough idle and lean

Car is an 02 wrx vf34
Stock airbox
Catless dp
No resonator or muffler

Car was acting fine up until I reset my ecu on accident, so I did the procedure for it to learn(cycle key to on for 15 sec, start car, let idle until fans turn on then turn off, then wait again then turn car on and drive and let the car relearn.)

Car seems to be running lean 17afr only at idle but wot and cruise seem okay. I have driven the car for about 10 miles or so but it's still running lean at idle and when coming to a stop or going into neutral the rpms dip low(350 or so) then back up to 750. Just want to know if it's just cause it's still relearning and need to drive more or what. I have literally checked every Google search on this on our cars and can't seems to see my same situation. Thanks
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Old 04-13-2016, 07:56 PM   #2
Substi555
Scooby Newbie
 
Member#: 259953
Join Date: Oct 2010
Chapter/Region: TXIC
Vehicle:
2005 WRX STi
OBP

Default

Bump, anyone have any insight?
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Old 04-20-2016, 07:34 PM   #3
Nettalp
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Member#: 93812
Join Date: Aug 2005
Chapter/Region: SCIC
Location: Huntington Beach,CA
Vehicle:
2004 Wrx wagon
Platinum Silver Metallic

Default

My only thought is how the ECU was flashed. Ex. my old bugeye, I had to flash my map everytime I reset ECU or disconnected my battery. Tuner told me thats how he worked. Could be how your situation is but obviously not 100% as I don't know your cars history
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Old 04-20-2016, 07:59 PM   #4
Mahtava
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Member#: 292449
Join Date: Aug 2011
Chapter/Region: NESIC
Vehicle:
02 wrx
95 gf5

Default

when is the last time you cleaned the idle air control valve?

the gaskets pretty cheap.
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Old 04-21-2016, 03:31 PM   #5
lorettatheimpreza
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Member#: 300992
Join Date: Nov 2011
Default Rough idle

My car runs great normally but just recently the idle is really low about 750 I figured out I was running on only cylinders 3 and 4. 1 and 2 are not sparking at all. I've replaced the plugs the leads and coil pack. Still nothing
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Old 04-21-2016, 05:01 PM   #6
86Dreams
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Member#: 385256
Join Date: Mar 2014
Chapter/Region: Tri-State
Location: 02 wrx Harriman, NY
Vehicle:
What is this? An
injector laying contest?

Default

Quote:
Originally Posted by Nettalp View Post
My only thought is how the ECU was flashed. Ex. my old bugeye, I had to flash my map everytime I reset ECU or disconnected my battery. Tuner told me thats how he worked. Could be how your situation is but obviously not 100% as I don't know your cars history
This is a good hypothesis. The MAF sensor calibration is a a reflash table, if you reset the ecu then it could have taken the MAF calibration with it. Who is your tuner? Do you have an accessport or tactrix?
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