Weird Issue With My Rb26...please Help

[nsta]

Hey guys, im having some really weird issues with my r33 gtr right now.....heres the mods:

r33 rb26 motor

bosch 040 fuel pump

r34 n1 turbos

nismo 555cc injectors

aftermarket dumps

apexi powerfc

iridium plugs

I had my car tuned about 4 months ago and got 312kw atw....it was running fine up until the last couple of weeks...

Basically what happens is that when i wide open throttle after keeping revs high for awhile, my car will start choking/missing???......ie...lets say im in 2nd gear holding 5000rpm constant for a few seconds.....then i wide open throttle (foot to ground)....my car starts missing and choking, and jolts really badly....

Now if i wide open throttle from the get go (ie at the lights)....i dont have this issue at all, its only when my revs are kept constant and then i boot it....i was thinking maybe boost spike?, or missing due to plugs/coilpacks????

Ive noticed this occur twice....once while going around a corner holding, the other when going up a hill.....ive noticed my car sounds a little different aswell (like a exhaust leak somewhere maye???).....

Please help diagnose issue....anyone else had similar issues?....ive had issues where the missing was constant (ie after certain revs)....but this is totally different, as its only when i hold the revs, then give it WOT!!!

[Marlin]

Assuming you have the Power FC hand controller, take a look at the voltage readings of your airflow meters. They should be showing a voltage with a max difference of about 10%.

I had a similar issues many moons ago on mine and it was a meter.

[nsta]

thanks, ill check....so this is a sin of the airflow meter playing up is it?

[_K1NGTR_]

had a similar problem almost the same problem mine would chose to come and go and would do it when it felt like it then i f**ked around with my spark plug leads and they were old and i cable tied them it stopped for a while then my bottom end went so i never determined the problem..