I just installed a K&N CAI in my 2003 G35 Coupe. It causes the car to stall, idle inconsistently, and it lags in acceleration from stops. I've tried everything in the book to fix the problem save buying a $700 tuning job, so I am just going to say K&N CAIs don't work well in infinitis. So, F*** it, I'm skipping the CAI step and getting a supercharger...

Really though, anyone got rebuttals to that statement? What CAIs have worked well in your G? Has anyone had problems with K&N mods?

 

um..if you're planning on FI, why are you wasting your time/money on an intake? sounds like you might have ding the maf sensor during the install?

 

was the filter brand new? did you use the cleaner on it before install?

 

intakes are probably one of the simplest mods out there. literally just a filter and pipe, its hard to mess it up. are you sure you installed everything correctly?

 

I had the K&N worked fine...


I now have the stillen cai with the K&N filter... still works great.

 

Sounds like you messed up the install and have vacuum leak behind the MAF sensor. That will cause erratic idles, stalling, and laggy performance. You should take out the intake, disassemble, reassemble (inspecting your work), and reinstall.

Though intakes don't do squat for these motors, a corrently installed intake, regardless of make, won't cause driveability issues except for 6MT cars. The issue there is the motor can stall out when going full throttle, releasing the throttle, and putting the car into neutral at speed.

 

i think u had an ID-10t problem

 

I didn't mess anything up during install. I even had it looked at by Twisted Fusion auto shop out here by Ft. Benning and they said everything was installed correctly and it looked good, it just wasn't running right for some reason. And about FI, I won't have the 5.5 grand to spend on it for quite a while so $300 is worth it in the mean time. that is, if I can get it to work...

 

I am baffled now because so many people have never had a problem with their CAIs. Your right, ajkVQ, it is simple. Thats what I don't understand. The mechanic took it apart and put it back in after checking to see if the stock one worked so I'm not sure what got messed up in the process. They said the diameter of the tube could be throwing the calibration of the Mass air sensor. I am going to get a stillen setup I think. I just wanted to see if anyone had a K&N with the same problem but apparently I'm the only one. Alright, thanks guys.

 

It could be an additional issue that you are not seeing/expecting. Take a can of brake cleaner and with the car idling spray on the outside of the intake parts(intake,maf around where the pipe meets up, intake plenum) and see if the RPMs change. It could be air leak that was triggered somehow.

Also have you tried resetting the ECU?

Fellas, I know it sounds crazy that an intake would cause an issue like that, however I've seen worse.

 

I have the K&N short ram on my 06, no issue so far.
techs @ infiniti dealer said it showed good work on computer.