R32 Gtr Choking Issue

[Jdags]

Hello there! while driving my stereo system turned off and wouldn't turn back on. The next day I drove around then all of a sudden my car would choke/stutter in 2nd gear, I drove home slowly and took 3rd and 4th gear a bit higher with no issues then dropped into 2nd and started to choke again at around 4k revs.

Got home took battery terminals off then back on. Stereo system works now butchoking remains. Gave it a rev in neutral and same choke at 4k revs.

Any ideas?

Mods are as follows: nismo front mount, autronic ecu, injectors, spitfire coilpacks, n1 turbos, tomei fuel regulator with walbro in tank pump, 3" turbo back exhaust, turbo smart bov, boost controller 2stage, blitz turbo timer. Has previously had a dyno tune.

Any help is very much appreciated !! Thanks guys

[mad082]

what do you mean by choke? do you mean misfire? if it is just misfiring then how old are your plugs? if they are old then that may be the cause, but it may also be that you have a failing ignitor or coilpack or even an issue with one of your afms

[niZmO_Man]

Sounds like dying AFMs

[Jdags]

Ah makes sense, ill test them out and see how I go. Doesn't have any afms cause of the ecu.

[Jdags]

Yeah it sounds just like when I hit the limiter

[Jdags]

It ended up being the limiter. Very strange that it would just change while I'm driving. I thought it'd be in limp mode but not sure thats possible cause the ecu is aftermarket. Any thoughts on how this could happen? I'm thinking there could have been some kind of shortage or something