Vx v6 manuel MISFIRE

[jvan5391]

Ive got a vx series 2 s pack manuel its got a misfire the comes and goes some times its there at 2000rpm and some times it doesnt start missing to 4500rpm, it does it under all conditions and im absoluting stumped on my situation, so far ive...
Replaced the DFI module
Replace coil packs with a viarty of working packs
New crank angle sensor
New Fuel pump
New Fuel Filter
New air filter
New bouch leads and plugs evening knowing the ones on it were only 6months old
I cut the traction control wire to rule out a dodgy unit
Ive cleaned all the injectors Maf sensor and throttle body, and now i dont know what to do, its all starting to add up and im only a apprentice so money is tight, Anyone got any idea what it could be???

[MR_VX]

how many kms on the motor?
what fuel do you use?
any mods to the motor?

[jvan5391]

Its done 250,000 and its got yella terra 1.91-1.95 roller rockers, big throttle body and low temp thermostate, i run 95 unleaded which is premuim

[jvan5391]

and some times the misfire disappears all together

[MR_VX]

have you done a fault code test to see if that brings any thing up?

[jvan5391]

yeah the crank angle sensor did but thats been changed

[MR_VX]

umm maybe try replacing the o2 sensors on the exhaust ???? or at least clean them

[Cameron P]

i have a slight miss underload, like sometimes if i accelerate too much in 5th doing 60km/h.

i have been told its an injector?!

[MR_VX]

i have a slight miss underload, like sometimes if i accelerate too much in 5th doing 60km/h.

i have been told its an injector?!

you drive around at 60km in 5th???

[Jonno]

you drive around at 60km in 5th???

Lol
I kno alot of people that do

[MR_VX]

^^^^ dead set.? surely it would use more then normal fuel.

[jvan5391]

ill try the exhaust sensor then, i cleaned the maf with carby cleaner and didnt touch it

[jvan5391]

well i cleaned the exhaust sensors and the miss is still there and is becoming more fequent expect the other day i got angry with the misses and went and did skids and the miss actually seemed to go all together after a while any ideas??

[MR_VX]

what fuel do you use?

[jvan5391]

premium all the time and run injector cleaner every four tanks or so

[MR_VX]

well im out... sorry to say its got me f*cked lol

[jvan5391]

any one heard of the maf sensor ####ing up even if cleaned properly?

[MR_VX]

yeah man they do sh*t them self a fair bit. worth a go

[jvan5391]

fuel preassure regulator

[jvan5391]

i meant what about fuel preassure regulator ???