EZEMaxima

Okay, i already check what it meant. Both the front and rear bank oxygen sensor showing lean condition. I checked both O2 sensors and they are fine. I changed the fuel filter less than 5,000 miles ago. The car run fine but seems it's alittle sluggish at times. Sometimes my idle drop to about 500 rpm, i'm thinking i might have a vacuum leak. I haven't tested it yet. I also hooked up the scanner while driving and noticed my timing would advance to about 43 on cruising but under full throttle it's only around 27. Anything else should i checked.

Eric

nismo2020

iTrader: (1)

have you replaced the knock sensor before? i had a bad knock sensor and got those codes but once i replaced the ks everything was fine.

EZEMaxima

I have one in my closet but never did changed it because my hand couldn't fit in the small opening. I got a few cuts before i could even get my wrench in there. I already picked up a set of 02 sensor both for the front and rear bank but I'll try to change the knock sensor first and see what happens. If all goes well, I'm installing my Apexi VAFC II to activate my MEVI and allow some fuel adjustments with it off or on. Then maybe some track time on Friday!!!

Eric

nismo2020

iTrader: (1)

funny i posted on this thread .. i got cel yesterday ..

EZEMaxima

I changed the knock sensor and both the front and rear bank O2 sensor and so far it's working good. I'll be installing my VAFCII next week if the check engine lights doesn't come back on.

Nismo20200
Sorry to hear that your check engine light is on. I never BACHI you.

Eric

EZEMaxima

the CODE P0171 keeps coming back, the car runs fine, I will have to check for lntake leaks. I also had the P0300 code which is a random misfire and so far did not come back. I'm thinking coil packs are going bad but why would this cause it to become lean instead of a RICH condition. Would the EGR be related to this problem?

The scanner im using also shows te the MAF is in good condition.

Eric