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Old 10-13-2002, 11:20 AM   #1
Veck
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2002 WRX
WRB

Default UTEC Problem

I've been running fine now with my UTEC for a few days. Yesterday while driving to the store my car just flat died. After pushing it to the side of the road and waiting a few minutes the car finnaly restarted but had a persistant CEL. I got it home and pulled the code, its a P0103 Mass Air Flow Sensor circut high input.

If I remove the UTEC the car runs fine with no CEL. I put the UTEC back in either set on the stage 1 map or the stock map and I get the CEL and the car will die after about 1 minute of running.

I've made no modifications to the map at all. Anyone have any ideas what might be causing this ?
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Old 10-13-2002, 11:38 AM   #2
paul99se
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Did you try switching the UTEC switch to "0" for stock mode and seeing if it will start?

-Paul
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Old 10-13-2002, 11:50 AM   #3
Veck
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Yes, it generates the same problem with the switch in position zero and position 1. In both cases it will start with the CEL on and throw the P0103 code then die after about 1 minute.
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Old 10-13-2002, 12:06 PM   #4
RiftsWRX
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Make sure your dipswitches are U,D,D,D,D,U,U,U from 1-8

ORRRRRRR..... it sounds like you have a 550CC map and are running stock injectors, and your trimming out a LOT!

What mods did you tell them you had?

Jorge (RiftsWRX)
www.ProjectWRX.com
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Old 10-13-2002, 03:19 PM   #5
ScoobieSnaX
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I had the same trouble code in my car too the other day (but my car didn't die)....along with three missfire codes from cyl 1,2,4. I had them reset it and managed to get a new map from Phil which seems to work really well now....

Are you SURE you have'nt changed anything?
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Old 10-13-2002, 03:32 PM   #6
Veck
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Only engine related mods i've got currently installed are a BPM topmount IC, and the silencer hack.

The map thats loaded in position one is the standard stage 1 map 92 octane.

I currently have my switches as described on page 2 of the manual, from 1 to 8 UUUDDDDU.

If im reading everything correctly thats:
1 - Flash program - Normal
2- FCD Bypass - Safety On
3 - Spare
4 - O2 Select - Front O2
5 - O2 Select - Front O2
6 - Crank Out - Stock Crank
7 - MAF Out - Modified MAF
8 - MIL Out - Modified MIL

The switch settings you described are slightly different, you have FCD Bypass set to safety off, Crank Out set to Modified Crank, and MAF set to Stock MAF. For the stage 1 map do i really want Modified crank and FCD off ? I can understand changing to stock MAF might have an impact on the problem. Wish the manual had some info on when to select which signal output for the crank, maf and MIL.
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Old 10-13-2002, 03:33 PM   #7
Veck
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Yep im positive i've changed nothing. The only thing i've done at all in the way of programming is to make a backup copy of the map that was in position 1. I just did a copy map to position 2.

Drove the car to work and home on friday with no problems, went to drive it on saturday and then it died.
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Old 10-13-2002, 03:39 PM   #8
Fickle
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Good luck Veck. I hope you resolve this.

I'm glad I waited on the UTEC. I wanted to let all the bugs work out first. I would be extremely pissed if I spent 1k and my car had issues like this.
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Old 10-13-2002, 04:07 PM   #9
jimb
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Speaking of misfires, how does the UTEC fool the stock ECU into thinking it is really controlling timing? If it is a dedicated driver, with the stock ECU controlling timing as well, wouldn't the stock ecu think it was missing (radically different timing)?

jb
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Old 10-13-2002, 05:45 PM   #10
RiftsWRX
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Quote:
Originally posted by Veck
Yep im positive i've changed nothing. The only thing i've done at all in the way of programming is to make a backup copy of the map that was in position 1. I just did a copy map to position 2.

Drove the car to work and home on friday with no problems, went to drive it on saturday and then it died.
Your right.. I'm on crack... You know you have a stage 1 map if your zero column position does NOT have negative values. That would insinuate larger injectors. Start with that.

Also, your MAP intercept and gradiant calibration could be off. Are they at the default 204/244?

Jorge (RiftsWRX)
www.ProjectWRX.com
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Old 10-13-2002, 05:46 PM   #11
RiftsWRX
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'07 Honda FIT sport (5MT)

Default

Quote:
Originally posted by jimb
Speaking of misfires, how does the UTEC fool the stock ECU into thinking it is really controlling timing? If it is a dedicated driver, with the stock ECU controlling timing as well, wouldn't the stock ecu think it was missing (radically different timing)?

jb
Not if it's seeing what it thinks it's asking for

Jorge (RiftsWRX)
www.ProjectWRX.com
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Old 10-14-2002, 12:23 AM   #12
Veck
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Yep the MAP intercept and gradiant are at 204/244.
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Old 10-14-2002, 09:35 AM   #13
nmyeti
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Quote:
Originally posted by Veck
Yep the MAP intercept and gradiant are at 204/244.
Call us today, we'll get a new one out to you overnight... although from the CEL i wonder if you have a bum MAF sensor.


-Nathan
www.turboxs.com
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Old 10-14-2002, 01:14 PM   #14
Veck
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Called in this morning. New unit on the way.

I reverted the car back to stock running directly off the factory computer and drove to work this morning with no problems.
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Old 10-14-2002, 09:50 PM   #15
Fickle
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Quote:
Originally posted by Veck
Called in this morning. New unit on the way.

I reverted the car back to stock running directly off the factory computer and drove to work this morning with no problems.
Veck, what other mods do you have?

I'm sure Nathan will take great care of you man. TurboXS gets two thumbs up.
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