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Old 10-02-2005, 12:09 PM   #1
RunForest
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Member#: 84771
Join Date: Apr 2005
Chapter/Region: MAIC
Location: Alexandria, VA
Vehicle:
04 Turbo Fridge XT
vf39, sti ecu, sti tmic

Default Hesitation under light throttle 2400-3000 rpms

I have seen this posted in other threads but haven't seen a definitive answer.

Under light throttle my FXT hesitates and stumbles from 2400-4000 rpms. It feels like the ecu is pulling timing. Just past 3000rpms it is like someone flipped a switch and the car returns to normal (although it feels like it is down on power).

I have reset the ECU and sprayed the MAF with electrical cleaner. The problem went away for a few minutes but slowly came back as I drove the car.

Any ideas?
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Old 10-02-2005, 12:59 PM   #2
WRXout
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Join Date: Jan 2004
Location: Houston, on highway 6
Vehicle:
2005 WRX STI FTI 20G
ASPEN WHITE

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oh thats your utec! there is a cross over point that needs to be finly tuned. i got ecutek cause i found myself skkipping college to tune my car lol. when you pmed me you never metioned you had utec. its not bad either its just a uncomftrouble type of thing, no reason to worry..... i would get ecutek i love it. you can keep your utec if you want.
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Old 10-02-2005, 01:56 PM   #3
RunForest
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vf39, sti ecu, sti tmic

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I don't have a UTEC, I am using a stock STi ECU.
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Old 10-02-2005, 09:20 PM   #4
intercede007
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Location: Denver, CO
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2013 DGM XVC

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Quote:
Originally Posted by RunForest
I don't have a UTEC, I am using a stock STi ECU.
We 2005+ Legacy GT owners are going through exactly what you just described.

Subaru claims to have a "fix", which consists of the dealer yanking the ECU, FedEx'ing the thing to SoA and getting it reflashed. 3 day turn around usually, and several of the owners I've talked to have said in a couple hundred miles the car re-learns it's old habits again. Software tuning helps (Cobb AP's), but again the car just ends up going back to the way it was before.

I've just learned to drive around it. I've never had it bad enough (some guys describe it like the car jumps 3 feet into the air repetedly when it happens ) for it to be detrimental; mostly I just go easier on the clutch and I never experience it.

Wish I had more to tell you
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Old 10-02-2005, 09:25 PM   #5
WRXout
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omg i looked at i thought it said utec, sorry
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Old 10-02-2005, 10:24 PM   #6
3BadHabbits
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2005 05FXT-RICE!!!
Silver RICE!!!

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I have the same thing with my XT....just go and beat the living $hit out of it. Youll be having so much fun doing it you wont even worry about that little hesitation. Oh by the way, do you still have the stock up pipe in there, and all your cats??
-might be your problem..
I ignore it because im usually above 4k at all times...
Nick
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