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Old 05-07-2019, 06:32 PM   #1
KCRS01
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Member#: 466673
Join Date: Apr 2017
Location: Canada
Vehicle:
2009 STi

Default Dam Dropped!!

Okay here's the story

Dam started dropping after i did a pull about 1/4 of the gas and that was when i pulled the car out of storage and had fuel stabilizer mixed with the gas. Dropped to 0.35 but fine and feedback was fine. Went to the nearest gas station resetted the ECU then dam is back to 1. No fine or feedback knock values besides the typical ghost ones in a while. No smoke from oil filler/weird engine sound

Dam hasn't dropped ever since, fast forward to today i just filled the tank with 91 shell v power (best one in the city) and did a little 2nd gear pull and it dropped to 0.75, feedback and fine is 0.

Also AF learning 1 is at 7% when idling which means there is a vacuum leak but getting that fixed soon.

Any thoughts?

Things to consider:
No AOS
Built engine
Bolt ons
PRO tuned by previous owner on 91 oct
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Last edited by KCRS01; 05-08-2019 at 10:19 AM.
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Old 05-07-2019, 06:42 PM   #2
KCRS01
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Member#: 466673
Join Date: Apr 2017
Location: Canada
Vehicle:
2009 STi

Default

Update: af learning 1 is slowly climbing beyond +8%. And still no weird noise or ringland failure symptoms
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Old 05-07-2019, 09:00 PM   #3
Scorpius
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Join Date: Oct 2013
Location: Northern Indiana
Vehicle:
2019 WRX/STI DGM
2016 WRX/STI ISM

Default

1. Calm down.
2. Car had some stale gas in it.
3. Run several tanks off fresh 93 gasoline through it.
4. Drive normal. No race car stuff.
5. Maybe some Techron Fuel System Cleaner as well.
6. Worry only after 1-5 have been thoroughly accomplished.
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Old 05-07-2019, 10:39 PM   #4
KCRS01
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Join Date: Apr 2017
Location: Canada
Vehicle:
2009 STi

Default

Quote:
Originally Posted by Scorpius View Post
1. Calm down.
2. Car had some stale gas in it.
3. Run several tanks off fresh 93 gasoline through it.
4. Drive normal. No race car stuff.
5. Maybe some Techron Fuel System Cleaner as well.
6. Worry only after 1-5 have been thoroughly accomplished.
Yeah i need to come down lol
Car is tuned for 91 and i run 91 vpower only even tho we have 94 tho its hard to get.

I always baby the car when i take it out and very rarely do pulls only to stretch her legs.

Should i reset ECU? To relearn DAM? Or drive the car and hope dam goes back to 1
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Old 05-08-2019, 02:07 PM   #5
Craigster08
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Chapter/Region: Tri-State
Location: Philly Area
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Silver

Default

No, do not reset the ECU. Just drive the car.
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Old 05-08-2019, 09:36 PM   #6
Scorpius
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2016 WRX/STI ISM

Default

Quote:
Originally Posted by KCRS01 View Post
Yeah i need to come down lol
Car is tuned for 91 and i run 91 vpower only even tho we have 94 tho its hard to get.

I always baby the car when i take it out and very rarely do pulls only to stretch her legs.

Should i reset ECU? To relearn DAM? Or drive the car and hope dam goes back to 1
Run a couple tanks of fresh gas through it and see how things go.
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Old 05-09-2019, 08:17 AM   #7
KCRS01
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Join Date: Apr 2017
Location: Canada
Vehicle:
2009 STi

Default

I'll drive the car whenever i can then update this thread.

But so far dam is still at 0.750 when starting no fine and feedback knock besides the low rpm. Not consuming coolant/oil. No other symptoms of piston/ringland failure.
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Old 05-13-2019, 08:00 PM   #8
KCRS01
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Join Date: Apr 2017
Location: Canada
Vehicle:
2009 STi

Default

Update: no major high Fine knock or feedback knock. There is some when downshifting like -2 or less.

Dam still at 0.75 but the tank is still like 3/4.

Havent fix af learning, but its been going up to more than -10% when car has been running for a while then im at stop or idling. Just waiting for parts to arrive

Driving it like a granny
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Old 05-13-2019, 08:43 PM   #9
Mahend21
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Default

Quote:
Originally Posted by Scorpius View Post
1. Calm down.
2. Car had some stale gas in it.
3. Run several tanks off fresh 93 gasoline through it.
4. Drive normal. No race car stuff.
5. Maybe some Techron Fuel System Cleaner as well.
6. Worry only after 1-5 have been thoroughly accomplished.
+1
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Old 05-14-2019, 09:46 AM   #10
Scorpius
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Member#: 370806
Join Date: Oct 2013
Location: Northern Indiana
Vehicle:
2019 WRX/STI DGM
2016 WRX/STI ISM

Default

Quote:
Originally Posted by KCRS01 View Post
Update: no major high Fine knock or feedback knock. There is some when downshifting like -2 or less.

Dam still at 0.75 but the tank is still like 3/4.

Havent fix af learning, but its been going up to more than -10% when car has been running for a while then im at stop or idling. Just waiting for parts to arrive

Driving it like a granny
Techron Fuel System Cleaner does wonders for some issues. I've had this stuff fix fuel gauge problems in one tank of gas.
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Old 05-17-2019, 10:59 PM   #11
KCRS01
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Member#: 466673
Join Date: Apr 2017
Location: Canada
Vehicle:
2009 STi

Default

Good news! Dam went back up to 1 when i was driving it and the a/f learning 1 is slowly fixing itself lol.... It used to be more than - 10, getting closer to 0.
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