evolutionm.net - View Single Post - Is my tune f****** up or my o2 sensor is ?

Dragking2189 · Oct 24, 2009, 04:39 PM

PLEASE READ I NEED HELP !!!!!!!!!! THANKS

I need help fast . I got my evo tuned on the stock ecu 2 months ago everything was perfect the car ran strongs I made 560whp on e85 @ 33 psi on 35r and the a/r ratio would always be 11.9 all the way to red line. I didn't race the car for 3 week's last night I wanted to race and as soon as I floored it I realize that a/f went to 12.8 by 7k I new something was wrong I cheked for boost leaks found nothing , I also checked for fuel leaks nothing , my fpr pressure was at 45 I raised it up to 55 and did a 3 gear pull and the a/f was 12.6 and the higher I rev it the leaner it got .... I lowered the boost to 30psi and the a/f was still 12.9-13's
Is my tune messed up or is my wideband o2 sensors not reading correctly please help? WHAT CAN I DO ABOUT THIS PROBLEM? THANKS

Oct 24, 2009, 04:39 PM	#1
Dragking2189 Evolving Member Personal Sales Rating: (22) Join Date: Mar 2008 Location: Florida Posts: 451 Drives: lancer evo Ix mr	Is my tune f** up or my o2 sensor is ? PLEASE READ I NEED HELP !!!!!!!!!! THANKS I need help fast . I got my evo tuned on the stock ecu 2 months ago everything was perfect the car ran strongs I made 560whp on e85 @ 33 psi on 35r and the a/r ratio would always be 11.9 all the way to red line. I didn't race the car for 3 week's last night I wanted to race and as soon as I floored it I realize that a/f went to 12.8 by 7k I new something was wrong I cheked for boost leaks found nothing , I also checked for fuel leaks nothing , my fpr pressure was at 45 I raised it up to 55 and did a 3 gear pull and the a/f was 12.6 and the higher I rev it the leaner it got .... I lowered the boost to 30psi and the a/f was still 12.9-13's Is my tune messed up or is my wideband o2 sensors not reading correctly please help? WHAT CAN I DO ABOUT THIS PROBLEM? THANKS Last edited by Dragking2189; Oct 24, 2009 at 04:47 PM.
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