My Car Is Revving By Itself

[Meiji]

g'day everyone,

so my r32 gtr has started doing this funny thing every now and then (but usually when i pull into my garage, up a slight slope, or sometimes when i pull up to the lights). the engine seems to rev (or surge) without me touching the pedal. It does it a few times, then settles down. has a powerfc fitted (dunno if that's relevant).

so...any ideas??

[mrgilly]

We had a camira which did the same thing and it was a dodgy computer - has it started doing it since a tune?

[Links]

How much does it rev?

[princess_camii]

hi there check afm maybe one not working good

[SLIPPERY]

the problem would be that the idle value on the power fc is set too low for your idle

The car wants to, for example, idle at 1200 but the power fc idle is set to 1000rpm. Therefore it tries to pull the idle down to that value but cant keep it there possibly due to a manifold leak which lets in air and increases the idle.

A way to get around this is to add more fuel to the idle cell on the power fc or to increase the idle rpm on the power fc so that it'll idle a little higher but steadily.

[Meiji]

aha, thanks all for the replies. i remember my old gtst had an afm issue and this doesn't feel like that. it revs by maybe 800-1000rpm, so it really does sound like it's trying to keep the idle up somehow.

it could be the powerfc: it was fitted and tuned about two months ago, but i'm really only noticing it now.