mpact1981

iTrader: (12)

Ok I have an 08 NISMO and in any gear between 0-3,000 RPM at WOT my car will spit and sputter as if the VDC is kicking in or something. The thing is the slip lights never comes on and it doesn't throw any CEL. Above 3,000 rpm everything comes together and i finally launch down the highway.

I have the stillen gen 3 intakes and test pipes and im wondering if maybe it's throwing off the air/gas mixture at low RPM/WOT.

Has anyone else had this problem and if so, what did you do to fix it?

terrasmak

iTrader: (8)

Get a tune

nothix

iTrader: (27)

still have stock intake? try putting it back and seeing if the problem goes away.

Make sure to do a full ecu reset.

TheCanuck

my nismo does the same thing. I got it tuned and it still happens.

I have full straight pipes all the way out, and stillen g3's.

XO2 exhaust, Berk TP, G3 CAI, UPREV.

hellsoldiers08

iTrader: (3)

so you idle at 0rpms hmm interesting...

TheCanuck

When I am sitting in N my rpm is 1k

hellsoldiers08

iTrader: (3)

hmm cool but i wasnt talking to you.... and sense you have a tune you can get it set to have your car idle at that rpm if you want.

mpact1981

iTrader: (12)

Yea I still have the stock intakes just trying to avoid the work involved with pulling the stillen gen 3's, pulling the bumper and everything. I'm glad to hear someone else has the same issue though, sucks to hear a tune didn't solve it. I thought for sure that's all I would need. I'll try going back to the stock intakes after Saturday and see what happens.

Nice catch hellsoldier, maybe next time you can chime in with some USEFUL input.....

TheCanuck

I don't see why its bothering you.. Besides its not the intakes, its the test pipes that are doing it.

Just go very easy on the gas or keep a higher rpm. You have a modded sports car, quit driving like a *****!

mpact1981

iTrader: (12)

I think it's a fuel issue myself. My car had the same tank of gas in it for over a year, being started and idled about once a month. Int the past month it's had that tank run out and gone through 2 more. I'm going to fill it up again and try running that HEET stuff in it, maybe some water buildup?

why would you think it's the test pipes? Explain your reasoning please...

abo

iTrader: (5)

hmm i had this same problem. but i was due for my 60k maintenance and after i was done the problem went away. i think it might be dirty air filter and/or dirty MAF.

TheCanuck

Never happened to me until I got the test pipes. I ran the x02 and g3's with no issues. Got Berk TP's installed and since then the car has done that. I drive quite aggressive everywhere so it really doesn't bother me. I just have to be really easy on the gas or have it in high rpm. Can't use any of 6th gear under 60mph

Z_enthusiast

iTrader: (16)

Me myself personaly? lol I think your old gas has gummed up your injectors and or fuel filter... Havent you ever watched the stabil commercial bro?!

Naut

iTrader: (13)

Funny, right after I read this thread I came across another thread where someone with an 08 Z mentioned a problem very similar to yours. Hopefully this narrows things down a bit.

mpact1981

iTrader: (12)

Finally popped a code, failed bank 2 cat conv. I putting my stock cats back in today and clearing the code to see if this solves it.

hellsoldiers08

iTrader: (3)

hmm i dont see how a tune didnt fix it. before i had a tune when i had stock intakes, with tp and catback. i would hesitate around 2200 to 3000 rpms. got a tune and it fix.

I honestly have to agree with the guy who said gummed up injectors. either way, i would get on a dyno and see what the afr are before doing anything. also the only thing the stock cats would do it fix the problem lol because when you have tp then add intakes your afr do get leaned out a little.

mpact1981

iTrader: (12)

Well I cleared the code and it's running pretty good right now. I was going to go back to the stock cats so it would stop tripping the 02 sensor.

when it trips the 02 sensor you go into a kind of default afr which causes it to run shitty. I don't know how to explain the whole science behind the ecu doing that but thats what causes it to run shitty. My test pipes have a built in defouler so the quick fix most people do won't work with these.

I've got a computer so it's easy for me to just keep clearing the CEL if it pops again until I can figure out a better solution.

I've also run a tank of gas with HEET to get rid of any water which may have built up and im currently running a tank of Lucas injector cleaner. I also changed the oil..... lol