[hemi to e90]

Originally Posted by benzy89

o2 Sensor broken??

doubt it

i get the misfire code first. then after a hard pull i get the lamba codes

[Kevin@AKMotorwerk]

i bet the rear 02 sensors are backwards, gray to back turbo, black to front

[benzy89]

Originally Posted by hemi to e90

doubt it

i get the misfire code first. then after a hard pull i get the lamba codes

Maybe sensors are backwards?? I'm gonna stop taking guesses & just let you know how tomorrow goes.

[hemi to e90]

Originally Posted by Kevin@AKMotorwerk

i bet the rear 02 sensors are backwards, gray to back turbo, black to front

i fucking hope your right kevin. is it a big deal flipping them back? can u see it easily?

[Kevin@AKMotorwerk]

Originally Posted by hemi to e90

i fucking hope your right kevin. is it a big deal flipping them back? can u see it easily?

yes you can see them very easily from underneath, the passenger side dp is the back turbo, should be gray wire coming off o2 sensor, the drivers side is obviously the front turbo, should be black wire coming off that dp, the fronts arent as easy to see without taking the big tray off underneath, and using a flashlight. but if the front 02 sensors were put in reverse, the car would most likely run really really crappy, not sure since i've never done it backwards

[hemi to e90]

Originally Posted by Kevin@AKMotorwerk

yes you can see them very easily from underneath, the passenger side dp is the back turbo, should be gray wire coming off o2 sensor, the drivers side is obviously the front turbo, should be black wire coming off that dp, the fronts arent as easy to see without taking the big tray off underneath, and using a flashlight. but if the front 02 sensors were put in reverse, the car would most likely run really really crappy, not sure since i've never done it backwards

got it, hopefully everything will be 100% tonight (at least with that), if not

[benzy89]

Kevin & Alex -- Can't remember who I spoke to last week but you guys were right. My car had the same problems (misfires, Lambda codes, car ran like shit), turns out the second o2 Sensor were backwards.

Switch them around this past weekend, car runs perfectly + pulls like a rocket on Stage 2+

[EJ_3]

Originally Posted by Kevin@AKMotorwerk

yes you can see them very easily from underneath, the passenger side dp is the back turbo, should be gray wire coming off o2 sensor, the drivers side is obviously the front turbo, should be black wire coming off that dp, the fronts arent as easy to see without taking the big tray off underneath, and using a flashlight. but if the front 02 sensors were put in reverse, the car would most likely run really really crappy, not sure since i've never done it backwards

When I read this, I laugh and was sure I installed the sensors in the right pipe... Well, I just threw my car up on jack stands a few minutes ago and noticed that the wire with the gray shield was going into the wrong dp according to your post . Since I'm a giant, I'm putting it on a lift tomorrow morning to correct the issue. Thanks for this informative post!!!

SN: I wonder why it's giving me problems now after running Stage 2+ since February?

[benzy89]

Originally Posted by Manny_World

SN: I wonder why it's giving me problems now after running Stage 2+ since February?

I would think simply cause it's getting warmer outside (Feb vs June temps) so the car is getting a more accurate reading on the emissions.

[EJ_3]

No more shuttering, CEL, misfires, and codes . That nightmare over is finally over.

Originally Posted by benzy89

I would think simply cause it's getting warmer outside (Feb vs June temps) so the car is getting a more accurate reading on the emissions.

Make sense.