Thread: Why am i getting KR?

Yeah that will also cause you to dump fuel. And a quick fix for the cat issue if you have a rear bung for the o2 just do the spark plug non fouler trick.

Sent from my mobile office.

Originally Posted by slick2500

Yeah that will also cause you to dump fuel. And a quick fix for the cat issue if you have a rear bung for the o2 just do the spark plug non fouler trick.

Sent from my mobile office.

i cant find a dam non fouler at my work (CAP) i know ive seen them too

Autozone, advance, Oreileys its like $6 p/n 42202 or 42209 which is suppose to be shorter

And heads up your probably going have to remove the exhaust donut on side that the o2 bung is on it won't fit with the fouler..easily.

Originally Posted by REDCOMPG

And heads up your probably going have to remove the exhaust donut on side that the o2 bung is on it won't fit with the fouler..easily.

sweet thanks guys, this with a nice polish and wax today after work

Originally Posted by slick2500

Yeah that will also cause you to dump fuel. And a quick fix for the cat issue if you have a rear bung for the o2 just do the spark plug non fouler trick.

Sent from my mobile office.

so how does this or the o2 bung extentions actually work? like how does it trick the rear o2 or pcm to think differently?

Originally Posted by Ginseng

so how does this or the o2 bung extentions actually work? like how does it trick the rear o2 or pcm to think differently?

Not a grand prix but the non fouler and 02 part is what you want, and it explains how this works as well. $5 o2 cheater/non fouler how-to - evolutionm.net

so i fixed my cross over leak and instantly got my mpg up driving around town at 17. Then i unhooked my battery and did the spark plug foul trick and the car seems so much more responsive kr seems to be down.Did a 1/4 pull taking it easy with torque app and hit 15.2 on it, but that was on a curvy road and a slow launch and i let off the throttle once. Car seems to be running better than ever. now its on to the tune and pully drop

Woooot. Yea a exhaust leak will ruin your day. Glad I went ahead and did thr spark plug fouler trip prior to you making this thread figured it would be a future issue that came up.

i did that non-fouler trick on my sentra se-r back in the day. worked like a champ.


i have some kr caused by a weak fuel pump at wot. may be something to keep a eye on

Originally Posted by TEK310

i did that non-fouler trick on my sentra se-r back in the day. worked like a champ.


i have some kr caused by a weak fuel pump at wot. may be something to keep a eye on

i thought about that but if my af is going from 14.9 to 10.5 at wot that meens im getting the extra fuel i need

btw guys my mpg went up but i did a pull today and seen 5.9 kr so ima take a look at the lower motor mount cus i feel some slight vibrations in the pedal

As I said before you don't have a clue what the real AFR is, only a wideband o2 sensor in the exhaust can tell you that.