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Old 09-27-2012, 03:50 PM   #24
Scooby Specialist
Member#: 311781
Join Date: Feb 2012
Location: Canada
2003 WRX w STI V8


OK! so I unplugged my front o2 sensor and guess what. First thing it transitioned properly and the A/F didn't spike up with partial throttle.

The only thing was that its lean to start of with (16-17 A/F). The main test was when I went partial throttle it didn't spike up and the A/F transition lowered. Heck it felt just as smooth running higher 16-17 A/F as it was running 14.4-15 A/F with the o2 in.

Also, my car idled nicely. Usually at first start it goes a little all over the place but perfect once warmed up.

I hope to god this is my issue.
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