+1 with davidv

 

I thought about that too. Possiable the O2 sensors in the manifiolds got damaged with the impact tools vibrating them, But I have no CEL. I also noticed it last night while driving 30-40 MPH gave it some gas to pass another car and it bucked. When I got home there was a smell coming for car, smelled like I was burning my clutch, But my car is Auto..I called the dealer today and will be trying to bring it in next week to pick up a loaner car.I hope there is no issue with my HFC's..

 

Okay when I said I had the slight hesitation, I should have emphasized that I ONLY HAD IT HAPPEN ONCE.

If this is happening constantly then I believe something is malfunctioning..

 

I had this happen to me once about 2 months ago. Get on the gas about 3/4, and the car really struggles to move and then i lunge forward. Now i had very low gas at the time, the light was on. I pulled into a gas station, turned the car off, filled up the tank, started it up and it never happened again. Maybe bad gas or bad gas quality at the bottom of the tank? Or just the fact that i turned the car off and on again fixed it, i dont know.

By the way I'm 5AT, JWT and Kinetix V+

 

could be o2 sensors on the car fouling out but not thrrowing the code for the light. Do you have the test pipes CEL fix on there?

 

Is your slip light coming on?? is this a base model or higher. Hit the tcs button and see what it does.

 

My car did the same thing, took off the HFC's put stock cats on and decided to wait till I could get the car tuned.

 

My 08 Nismo does this BAD with intakes and Berk HFCs. If I am moving at cruising speed in any gear and mash the throttle, it hesitates pretty bad and is very jerky. It also does this if I am at WOT and slightly let off the pedal. Once I get a full exhaust, I can run my custom tune and it should fix this.

 

Sounds like user error when it came to the installation.

 

I did mrev2+ spacer, hfc, and y-pipe pretty much all at once and my car was stalling like crazy. I would start the car and it would die if I didn't give it gas. I ended up taking it to a shop and having it dyno'ed... (when they tried to start it on the dyno it died and they had to start it again). Turned out my A/F ratio was like 13.5-14... after a tune all my problems went away and it even took the rattle out of the exhaust.