Erractic Reving and other misadventures

[Nizmo]

Hi all,

My stubborn bitch of an Auto R33 has decided that she'll start playing silly buggers with her revs .

Pulled up to the lights the other day everything was fine for 5 seconds then all of a sudden her rev's start surging and eventually she cut out ..... but restarted without a problem. Had no problem for a couple of days then this morning she starts bouncing them up and down at the lights again .... so i shifted it into neutral before it had a chance to cut out which stabilised them.

Just then at lunch i was watching the SAFC and when i stopped at one set of lights it was stable reving at 800rpm .... then at another set it was stable reving at 650rpm. Put it in reverse and it starts surging again.

I think hot weather also plays a part in this - the hotter the weather the more problems it seems to have - cold starts are fine - hot starts well its really hard to start in hot weather!!

Anyone have any ideas ..... pleeeeeezzzeee im desperate and i dont want to deal with this once summer kicks in with full blast!

Theres no aftermarket BOV's on it has SAFC II, EBC, Zorst, dumps and engine rebuild.

Cheers

Lauren

[strutto]

AAC valve and/or FICD valve playing up?

[WazR32GTSt]

i had a similar problem with my R32GTSt auto

at the lights, engine goes from 800 rpm to 2000 to 400 to 2000 to 400 (about 5 times) then stalls

started it up and was fine again :confused:

happened again before i got home

that night, i thought to myself, 'what the hell could it be?'. i could only think it was some sort of bad reading on a sensor somewhere.

I did the following to the car:

- ECU diagnostics check (came up all ok)

- cleaned AFM (and took off plug and put it back in to make sure there was good contact)

- cleaned O2 sensor with brake cleaner (to remove any carbon blocking the probe)

- cleaned air filter

- cleaned AAC valve with brake cleaner

- re-set ECU

have since never seen the problem surface its ugly head again!

if this is no help to you then my best bet to point the finger at is the AFM. i would try to source a replacement one to try to see if that fixes the problem.

hope that helps!

Warren.

[memphis]

Lauren, try resetting the ecu, my car used to have gearbox problems, once i reset the ecu, it was fine again.