mike2225 Posted October 18, 2013 Share Posted October 18, 2013 over the past week while driving at partial throttle out of boost my a/f ratio bounces back and forth on the aem gauge.while it does this my car feels like it is rocking back and forth while im cruising along but as soon as i step on the pedal it goes into boost smoothly and ill watch my gauge dip down to 11/1 right were its supposed to be under boost..currently running same mods for 2+years and 40k miles with zero issues:custom SRI, fms FMIC,wbr EL headers w/ UP,gs boostcontroller invidia dp and custom 3" cat back with protune mufflers and tuned by brentunning..any suggestions what could be the cause of this??? Link to comment Share on other sites More sharing options...
JmP6889928 Posted October 18, 2013 Share Posted October 18, 2013 Check front O2 sensor. Link to comment Share on other sites More sharing options...
700watts Posted October 18, 2013 Share Posted October 18, 2013 and or clean the MAF Link to comment Share on other sites More sharing options...
Windy Road Posted October 19, 2013 Share Posted October 19, 2013 Front o2. Sounds just like my car, replace the o2 and you'll be fine. Oh and reset the ecu. 276hp/347tq On a DynoJet Dyno Video - Had a big lean spot as you can tell in the second pull Link to comment Share on other sites More sharing options...
ehsnils Posted October 19, 2013 Share Posted October 19, 2013 and or clean the MAF Possible, and since it's a cheap action it's never wrong. Link to comment Share on other sites More sharing options...
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