Jump to content
SAU Community

Recommended Posts

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??

Link to comment
https://www.sau.com.au/forums/topic/169118-my-car-is-revving-by-itself/
Share on other sites

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.

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.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • The frontend wouldn't go low enough because the coilover was max low and the upper control arm would collapse into itself and potentially bottom out in the strut tower. I made a brace and cut off the kingpin and then moved the upright down 1.25" and welded. i still have to finish but this gives an idea. Now I can have a normal 3.25" of shock travel and things aren't binding. I'm also dropping the lower arm and tie rod 1.25".
    • Motor and body mockup. Wheel fitment and ride height not set. Last pic shows front ride height after modifying the front uprights to make a 1.25" drop spindle.
    • Here's Logans Silvia with R32 Drivetrain, mine will be slightly lower (more angle). He was constantly blowing the RH axles at around 16deg. I want to avoid this.    
    • Dredgggggeeee time; I have recently finally started driving the car. It sat for so long that the fuel tank gave birth to rust sludge and blocked my lift pump sock and one of my walbro 460's and left grime, rust chunks and muck all through the surge tank and system. I decided to commit and pull the trigger on an oem r32 gtr fuel tank and Frenchys twin 460 / sender / surge tank hanger combo and all new larger lines and fittings etc, also boost doc heater hose kit / new heater core and a heap of other bits and shits like wideband sensor installed in the dump and Syltech iacv + lines and all wired and added to current tune. now having lightly driven it a couple times without issue, I can happily report on the hta3076 in its current tune. still no boost control switched on, 20psi gate springs, car makes 22psi at 3200rpm in 6th gear with 30-50% TPS from cruise at 100kmh. Going by the old graph, this means it should be making 300-325whp at the same numbers above. Very very responsive setup under true road driving loads. all that's left for the build is body loom + PDM, finish the remote aircon setup, install carbon fibre parts and go for full tune and 30psi. the 315 rear tyres are now performing like they're 195's, wheel spin in any gear at almost any rpm, whereas my previous setup hooked up in 3rd no issue, albeit Nt01's back then / RB25 5spd vs (new) old date r888r's Z34 6spd now, + obviously all the support upgrades I listed in the quoted post above. car sits at 1-3psi on cruise at 100kmh, expectations totally exceeded and I'm beyond stoked with all this so far. IMG_4848.mov
×
×
  • Create New...