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Old 12-14-2000, 01:39 AM   #1
glenstiles
Scooby Newbie
 
Member#: 2827
Join Date: Nov 2000
Location: Woodland, CA
Vehicle:
2002 WRX wagon
Silver, baby, silver

Post TPS adjustment for 2-3 shift

Hi.

Just reporting that I am trying out this mod right now. I adjusted the TPS clockwise in an effort to cure the slight rise in revs in the 2-3 part throttle shift. I found this info from the SVX CD-ROM yahoo database. Supposed to take a few days to see if it works, so far so good- no check engine light, seems to shift with a little less hesitation, but will report back with any info/findings. BTW- I do have the stock resistor connected while doing the TPS mod.
Glen
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Old 12-14-2000, 09:54 AM   #2
kastle
Frank Army
 
Member#: 1457
Join Date: May 2000
Chapter/Region: SWIC
Location: Phoenix, AZ
Vehicle:
1999 Outback Sport
Steel Blue Mica

Post

Did you reset the ECU after doing it?
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Old 12-14-2000, 11:00 PM   #3
glenstiles
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Member#: 2827
Join Date: Nov 2000
Location: Woodland, CA
Vehicle:
2002 WRX wagon
Silver, baby, silver

Post

Nope, didn't reset the ecu. The car seems like it is learning, as the 2-3 slight rise in revs/hesitation is gone, and the car drives like it holds the gears longer (?) Any way, that is the sensation I'm getting. I'll have to see if this works out...

glen
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Old 12-16-2000, 12:52 PM   #4
CRZ_MSL
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Member#: 1610
Join Date: Jun 2000
Question

How do you adjust the TPS?
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Old 12-16-2000, 08:24 PM   #5
glenstiles
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Member#: 2827
Join Date: Nov 2000
Location: Woodland, CA
Vehicle:
2002 WRX wagon
Silver, baby, silver

Post

The TPS is under the H-6 cover- take off the cover, just two plastic screws hold it in place. The TPS is mounted on the driver side of the inlet going to the manifold, with a few wires sticking out the bottom. Two screws hold it in place- just loosen the screws and turn the sucker clockwise- I marked the position beforehand by placing a small notch so I could return it to the stock setting easily.

Glen
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Old 12-20-2000, 12:04 AM   #6
glenstiles
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Member#: 2827
Join Date: Nov 2000
Location: Woodland, CA
Vehicle:
2002 WRX wagon
Silver, baby, silver

Smile

Update- after doing the TPS mod for a little while now, I can say that it really helps the shift quality. Less harsh than the resistor mod, and just the right amount of shift smoothness. Nice comprimise. I wonder if my TPS settings were off previously or something? The car feels 'right', its hard to explain, but the shifts don't seem as vague now, and no surge on the 2-3 shift. Never had a problem on the freeway, but around town, it was annoying. No more...but...my mileage dropped a lot. Now I am going to assume its the computer relearning things, but I may have to adjust things slightly towards the original setting if the mileage continues to be this low...

to be continued...

Glen
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Old 01-10-2001, 11:55 PM   #7
glenstiles
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Member#: 2827
Join Date: Nov 2000
Location: Woodland, CA
Vehicle:
2002 WRX wagon
Silver, baby, silver

Post

TPS Update- the mileage was getting too low. I lost a few miles a gallon in the city- not only does that cost more at the pump, but that extra fuel has got to be going somewhere, and if its out the tailpipe, it'll eventually ruin the cat. Back to the stock settings (or closer to it.)

Glen
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Old 01-11-2001, 09:50 AM   #8
CRZ_MSL
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Smile

Hmmm...

[This message has been edited by CRZ_MSL (edited January 11, 2001).]
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Old 01-11-2001, 09:50 AM   #9
CRZ_MSL
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Smile

Thanks for the update.
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