hesitation and intermittent running problems

[love_boost]

i would check ecu for codes, how did the plugs look? if one is bad it can be a bad injector. a bad injector has simular symptons

[Nathyne]

Ohh should have been able to guess that one. Nope wont go wide open throttle and double checked blowing no smoke. The plugs appeared good my injectors are new (about 3000kms on them so I hope it's not them).

[Nathyne]

Seems it's not a boost leak I did hit .7bar before the problem started also seems the less load or less throttle there is the smoother she will rev. I am going to test the resistance of my coils tomorrow and look into getting an igniter pack. Should it be the same as a gts-t? .6-.9 Ohms? Also not sure if this has anything to do with this but this did start to occur after filling up with petro premium normally I get shell just thought i would mention it I did burn most of the old gas out though by now and topped up with shell.

[TW]

could be bad gas...

but i would be putting 94 from petro all the time if i were you

[love_boost]

you got a tune on shell 91 so you should stick with the same fuel that you got a tune with. switching fuels is a bad idea.

[Nathyne]

Wow I should have done this first checked ECU fault codes and it says MAFS so I guess one must be shot.

Anyone know a place that stocks them in Calgary?

Thanks for all the help I really should have done that first... lol

[Nathyne]

Okay so I have managed to clear all the fault codes but I am still having problems with jerking under full throttle... I am not too sure what to do next the ECU is flashing all ok now does it go back to a stock tune when you reset it? I was running a stock tune on nistune just with injectors sized to 750cc...

[DarkCaporaL]

Did you fix your MAF? IF the problem is with the MAFs and all you did was clear the codes, it will come back.

[Nathyne]

I figured it out... well sort of lol. It is my fuel pump was on it's last legs and couldn't keep up under hard boost it and intermittently stopped working completely died on me yesterday.

Thanks for all the help everyone.