I installed longtubes a few weeks back and now my car is showing a lean (15.5-16.5 AF) condition at idle and cruise. At WOT it shows 11.5:1 from 1,500-6k so that is fine. I have had my tuner look at it and he says the long and short term fuel trims are fine but the wideband still shows lean. Before the LT's it was 14.6:1 at all RPM except when WOT. Could it just be that I do not have enough exhaust flow over the sensor at low rpms now that I have the higher flowing headers and this is causing the meter to show lean and part throttle and then show perfect at WOT?
Wideband shows lean condition after longtubes...why?
- Thread starter S/CCobra03
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