Thread: Help! Weird KR Issue

Originally Posted by bluegtp91

Is the downpipe catted? If not...do you have an o2 simulator in there?

That shouldn't matter... unless it's a used cat with like 150,000 miles on it...

Originally Posted by SlowNA06

That shouldn't matter... unless it's a used cat with like 150,000 miles on it...

It should because using an o2 simulator in any '01+ car screws with cat diagnostics and fuel trims.

I'm not talking about the converter failing here.

Also, try to add a little pipe inbetween the filter and the MAF, sometimes the filter bolted on the end of the MAF can skew MAF readings causing crap readouts and messing with the tune. Been there, done that.

Originally Posted by bluegtp91

It should because using an o2 simulator in any '01+ car screws with cat diagnostics and fuel trims.

Oh oh oh oh oh right you are. My bad.

94k
motor mounts look good
92 oct every tank
new plugs
new wires
cleaned maf
downpipe is not even close to swaybar
running rear o2 without sim(going to turn off CEL with HP Tuner)
All I can think of right now

Originally Posted by wa04compg

running rear o2 without sim(going to turn off CEL with HP Tuner)
DP is catless

Handle this and get back to us.

Originally Posted by SlowNA06

Handle this and get back to us.

This issue was present with oem downpipe so I know it has nothing to do with me being catless

DP is catless

Originally Posted by bluegtp91

It should because using an o2 simulator in any '01+ car screws with cat diagnostics and fuel trims.

I'm not talking about the converter failing here.

Also, try to add a little pipe inbetween the filter and the MAF, sometimes the filter bolted on the end of the MAF can skew MAF readings causing crap readouts and messing with the tune. Been there, done that.

Ok ill try that for sure...I have the filter attached directly to the maf