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Old 04-10-2001, 09:32 PM   #1
2yLiTe
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Member#: 660
Join Date: Dec 1999
Location: Windsor, Ontario CANADA
Question SAFC Throttle not reading "zero"

Ok, this just started about a week ago.
When I first installed my SAFC, it was calibrated perfectly to accurately read RPM and throttle point. Lately I notice that even though I'm not on the gas, the throttle reading fluctuates between 0-3.3%...I thought maybe there was some resistance on the throttle cable...so I oiled it. I'm still getting a steady 3%, anyone have any idea? I was thinking of doing the "when all else fails" ECU reset <shrug>
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Old 04-10-2001, 09:35 PM   #2
kaos200
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i thought that was normal?
wouldn't 0% cause the motor to die?
I thought the idling motor (piece on side of throttle body) kept it open as needed for idling...
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Old 04-10-2001, 10:40 PM   #3
TaiChih
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Join Date: Jan 2001
Location: Odenton, MD
Vehicle:
1998 Dinan3
Bleck

Have a Nice Day?

Check your connections,cuz mine reads 0 at idle and I've had mine for about six months.
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Old 04-10-2001, 10:44 PM   #4
kaos200
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oh, okay nevermind mine then...
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Old 04-11-2001, 04:03 AM   #5
tmat3
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Join Date: Nov 2000
Location: NYC and Troy, NY
Vehicle:
2001 Impreza 2.5RS
BRP

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Reset the S-AFC by going to Etc. -> Reset All(?) -> Turn the ignition off -> Then On. That's what I did, and it solved incorrect throttle readings.
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Old 04-11-2001, 06:52 AM   #6
2yLiTe
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Ok, I reset my SAFC, but now I'm having a hard time inputing the initial settings.

Sensor Type: Hot Wire
Cyl: 4
Throttle: (arrow pointing up)
Grph Scale RPM: 8000

and now instead of the throttle reading 3% when i'm not on it...it reads 0% till I hit 5%...??????

Help???

[This message has been edited by 2yLiTe (edited April 11, 2001).]
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Old 04-11-2001, 07:01 AM   #7
tmat3
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2001 Impreza 2.5RS
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What year is your car? I assume you have MY99 or before since you're using Hot Wire.

Maybe, the SAFC went nuts? Is the connection between the SAFC throttle wire and the ECU throttle wire good? Mine reads 0% (it goes from 0 to 0.4%) when off-throttle. Before that, it was reading way off number including throttle reading only upto 80% when full-throttle. I reset the safc, and everything became good.

[This message has been edited by tmat3 (edited April 11, 2001).]
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Old 04-12-2001, 12:11 AM   #8
2yLiTe
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I've got a MY98. The battery is disconnected right now...I'm gonna try the reset...
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Old 04-12-2001, 12:25 AM   #9
2yLiTe
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Ok, just checked...it didn't work...
If I go WOT then the SAFC will register 100% but in neutral up to 4kRPM there's nothing.

???????
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Old 04-12-2001, 12:33 AM   #10
JulianH
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Check your actual TPS voltage from the monitor screen, and see if it looks like it is reading properly. Could be a flaky TPS.

JulianH
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Old 04-11-2001, 01:14 PM   #11
2yLiTe
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Location: Windsor, Ontario CANADA
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I'll try that...wasn't there a post about a bad batch of SAFCs?? I don't think mine is bad...but...you never know. I'll try checking that JulianH. Thanks!
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Old 04-11-2001, 02:52 PM   #12
Jason
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Location: Fremont, CA 94538
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2000 Legacy GT Ltd
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My AFC goes crazy on my throttle % when engine is on, the reading is continously bounce up and down. When the engine shuts off, the reading is pretty accurate. Wonder why.........
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Old 04-11-2001, 05:25 PM   #13
2yLiTe
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Ok, so when I got home I shut the engine off...just out of curiosity I turn the ignition on and press the accelerator...the throttle reading is dead on! I start the car...and it's still dead on! now I'm really confused...I'm gonna monitor it for the next few days...if it acts up again, I'm heading to Specmo to see Malen...
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