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Old 08-07-2003, 12:24 PM   #1
Scooby Newbie
Member#: 10846
Join Date: Oct 2001
Location: CO, US
2002 WRX

Default Bunk Gas?

So it looks like i have a crap tank of gas from 7-11 (citco gas?) 91oct but i wanted your guys opinion on this since i'm still pretty new to UTEC tuning here.

I've never had a single knock event while testing on flat roads till last night when i decided to drive up the canyon. I gained less than 300' in altitude so not much different than my base 5000' altitude. I didn't even get up the first hill before the CEL light flashed at me.

Plugged in the laptop, turned the ABC back a full turn and tried another hill, same problem, turned back another turn bringing me down to 13 gauge max boost (10.6 absolute), same problem. Knock only happened in 3rd gear at ~60mph. Am i off base to think that is pretty damn low boost to be getting knock??

5089 049  -3.1  00 ECU.  24.2 00000 
4755 087  -4.3  10 ECU.  rich 00000 
4329 096  -0.4  30 ECU.  rich 00000 
4368 097  +5.3  50 +21.6 rich 00000 
4415 096 +10.0  60 +21.8 rich 00000 
4528 097 +12.0  60 +22.0 rich 00000 
4585 095 +13.0  60 +22.2 rich 00000 
4616 086 +12.8  50 +14.3 rich 00004 
4604 058 +12.6  00 ECU.  rich 00000 
4504 000  +9.2  00 ECU.  13.3 00000 
4566 000  +4.1  00 ECU.  lean 00000 
4559 000  -0.8  00 ECU.  lean 00000
I understand uphill puts more strain on the car but why is that creating knock when flat roads aren't?

Should I back my boost map off at that rpm or just wait to get a different tank of gas?
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Old 08-07-2003, 04:00 PM   #2
Scooby Specialist
Member#: 39691
Join Date: Jul 2003
Location: Ogden Utah
2002 WRX Wagon


If you have never had problems before, maybe you should wait until a new tank of gas. I wouldn't go through all the hassle changing maps just incase it is bad gas.
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