Jump to content
SAU Community

Recommended Posts

Hi,

I've had the R32 for awhile now but have never bothered asking this question. It idles very strangely, once it is warm it settles to 700 rpm neutral. If I drive it cold and then change it to neutral just as I come to a stop it revs quickly to 1200rpm then drops straight back to 700rpm, however once it drops to 700rpm in neutral once it is perfect from then on whenever I change to neutral. I understand it is normal to rev higher when cold but it revs very high for only a split second then drops to normal.

The strangest thing I've noticed is that the car idles higher if in gear or while moving. When coming to a stop I can have the clutch in and it will idle at 1100 RPM, once I've stopped it might drop to 900 RPM, then when I change to neutral it will go back to 700 RPM. As soon as I put it into 1st it will rise to about 900 RPM again, the only way it drops to 700 is when I'm in neutral.

Does this happen to anyone else? Anyone know why this might be happened. I've cleaned AAC, IAC, AFM, I've adjusted TPS and CAS using a laptop connected to ECU so I have know idea why it does this.

Thanks for the help.

Adrian

Link to comment
https://www.sau.com.au/forums/topic/210906-r32-gtst-strange-idle/
Share on other sites

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

    • Yes to both! Yes to standard ECU and tune, but exhaust is aftermarket. Unsure on brand. Actually have it sitting in at my desk haha! I have to set it up on my laptop but this is a great next step, will do. So I generally try to shift before 4.5K RPM most times. I largely don't do a lot of high-rev driving, but I will take it up to red 1-2x a week max, as I know the occasional "Italian tune-up" is good for these cars.  Oh wow, is this way better than what I'm getting. Does this mean there's a good chance I have an issue?   Thanks for all the info so far guys.
    • Old Son, did you re-use the Holden ABS in the new shell or try a different module?
    • Yeah, nah. I had the actuator rod off it today. The arm will not move at all. Neither out, nor in. Yeah, you'd think so, but I've been thinking about that. Even when the actuator rod fell all the way off at the beginning of this saga, it would build more boost and faster in lower gears than it would in higher gears, and you'd think that that was the opposite of what should happen. But I strongly suspect that there is a thing with the gearing getting the revs to rise faster, that there must be some transient effect with the gas flow rate rising quickly, that you don't get with the more steady state case of the higher gears. Keep in mind - the gate is not shut in either of my weirdnesses. So things are not "normal". We normally think about a turbo spooling up (below the wastegate target) with the gate shut. I have all sorts of mental models running now where the gate is a little bit open, and having it stuck open allowing gas out while it should be going through the turbine has all sorts of weird effects (in these mental models). I'm thinking in the higher gears, the ex mani pressure builds to the point where enough gases spill out the wastegate to just prevent the pressure rising much more at all, or just creeping up, all the whole the revs are increasing and getting closer to the point where a gear shift becomes necessary.
    • Is it possibly wastegate actuator itself is sticking, or even the rod to flapper? Otherwise I reckon things are getting a bit rusty/worn   Also odd it won't boost in 3rd to 5th, but will in 1st, I'd expect the other way around with it slightly open as there's more time on your way to redline for it to spin up
    • Does anyone know ow what these two plugs are for and if they should be unplugged? Just put the dash back together and can't remember if these were plugged in before or unplugged! (Blue and white plugs) 🤦🏽‍♂️
×
×
  • Create New...