Having Problems With My R32 Gtr

[Tyranus]

Having troubles with my gtr, here are the symptoms:

Power: 320awkw

-When under load in 1st and 2nd gear it feels normal (fast) but i put it into 3rd it feels "slow"

-Then it decides to be slow in 1st and 2nd then fast in 3rd

-Literally 5 seconds later i boot it again to see any difference, it decides to be fast or slow in random gears

-The car has a f**ked clutch booster, its making the squeeky sound and is leaking air, could this contribute to the problem?

-I have checked my hand controller, at idle afm 1 is sitting at 0.1 and afm 2 is on 0.15 volts (actual numbers are afm1 89-94 afm2 1.06-8

-Under light load in neutral it gets closer to 0.2 difference and when i back off it goes to 0.27 difference

-Abd drops alot faster than afm 2, is that too much of an variable for those afms?

-The afm's are Z32

It sounds like a afm problem but i could be wrong.

Edited October 19, 2010 by Sedat

[DVS JEZ]

very possible its the afms, can you get another to borrow and try

[T04GTR]

silly question, but have you earthed the fuel pump? takes 5 mins to do and eliminates so anoying and potentialy destructive problems

[Tyranus]

Just tested the car underload and the results were

AFM 1: 4.19 volts

AFM 2: 3.88 - 3.98 volts

at idle

AFM 1: 0.91

AFM 2: 1.08

Is it normal for AFM 1 to be lower at idle and higher under load? And is that an acceptable variance?

The car has been running perfect today, no loss of power at all so i am stumped as to what the problem is. Any help would be appreciated and if this is in the wrong section can it be moved please

  T04GTR said:

silly question, but have you earthed the fuel pump? takes 5 mins to do and eliminates so anoying and potentialy destructive problems

Not sure, car was bought as is besides the tune i had done to it a month or so ago. Have had the car for a year and a half and this is the first time it has done something like this

[Moodles2]

Switch the AFMs, if it still happens you might have 1 turbo that's doing more work than the other. Or perhaps a boost/inlet leak somewhere between the turbo and AFM #2

[SKYGTRONE]

My friend had kind of the same problem and it was the Z32 AFMs it was pretty strange but we changed them, It can also be the turbos take a closer look at them.

If it works post a result

[R31Nismoid]

Looks like AFM:1 is playing up. Exactly what mine did (twice)

[Tyranus]

thanks for replies guys ill look further into it