Jump to content
SAU Community

Recommended Posts

I was driving in the city today, lots of stop/starting at traffic lights.

I drive off from the lights then notice that when I lift off to change gears, the revs kinda stay where they are and don't drop... nothing too bad yet, but the car still revved freely as usual.

Then I come up to the next set of lights (red) and stop. The cars revs drop down to idle, then the engine starts fluctuating, from idle up to about 1,500rpm and back again... continuously until the lights go green again (about 1 and half minutes).

Then the lights go green and I take off again, this time when revs rise and it's just about to hit boost, the car SHUDDERS so much (like lurching back and forth), that I just instinctively change gears... then when I build up speed again and almost hit boost, the car starts shuddering again so I change gears.

Then the at the next set of lights the car starts fluctuating revs again... Geezuz. So I just turn the ignition off and wait for the lights to go green. When they do, I switch the car on again and viola! Back to normal... :D:D:wave:

Can ANYONE diagnose the problem?

Link to comment
https://www.sau.com.au/forums/topic/124740-rb20det-weirdness/
Share on other sites

Yep stock ECU. Only running cat back 3" exhaust, big intercooler and about 10psi... although I don't have a boost controller of any sort... thats what the GReddy boost guage says.

So what sensor could it be?

Just to add, I find that when I go off throttle, sometimes it feels like the throttle body is completely shut, with proper engine braking happening... but other times it feels like (even though I've taken my foot completely off the accelerator) the engine braking isn't happening at all... almost like it's holding throttle as in not accelerating or braking. This I can live with, but still I don't know what it's happening intermittently.

Not sure about the shudder, but the idle sounds like a problem with the AAC valve.

It's been covered a gazillion times - go searching.

Ok we'll do. Tahnks

Anyone have any idea about the shudder, and the off-throttle holding revs weird thing?

the exact same thing happends to my mates r32. Been going on for about 4 months now, and hes taken it everywhere to get it fixed, changed EVERYTHING possible that could be the problem and still not fixed so if u actually find out whats wrong could u pm me the problem and what needed fixing.

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

    • Drain it. I got official Matic D but you can get whatever is listed as Matic D compatible.
    • Thanks guys,  Yeah I should at least have them dynoed, at least then I know what I've got as a starting point.  The springs on these are hard as rocks. I vaguely remember Russman saying he was going to sell the shocks to me with the rocks fitted, as he was keeping the softer springs for his new setup.  I didn't click at the time but of course that was to let me know the shock/spring wouldn't be matched.  I also remember pricing up new springs around 2014-15, but, house, money etc. it never happened. So that was another reason to have them rebuilt. I have rebuilt the forks on many motorcycles so I think I could handle the seals on these easily enough, but getting the valving right would be a rabbit hole I cbf exploring.  Duncan, interesting to hear RP was tuning these back then. I might give them a call.  In the mean time I have been busy fitting sway bars. The Whiteline rear sway bar I purchased 15 years ago finally got fitted, along with the Whiteline front bar that showed up last week. Just waiting on new links for the front sway bar to finish that off.  And my spare set of advan AVS VS5's should be back from the powder coaters in a Pearl White finish sometime this week, with a set of Hankook RS4's lined up for fitting.  And then I just have all the suspension bushes to do. A comprehensive kit is on the way... Lots to do before the Ararat hill climb. Cheers guys 🍻   
    • Nice car! I’m glad folks in the US have gotten past the FnF and are buying real cool cars like the 260RS I was with a bunch of mates in Portland about a year ago and spotted a green Stagea (just a regular 2.5T AWD) parked about 2 blocks away and they were like “a what?” So I made a bet with them for a round of beers and said “ok one of you run down there and tell me if the steering wheel is on the correct side” 5 mins later the American comes trudging back up the hill and goes “he’s right guys. Ok what beer do you want?”
    • Should replace OR drop the tank, give it's good clean. Might be worth replacing that entire fuel level/pump/cradle thing with this: https://frenchysperformancegarage.com/products/fpg-s13-180sx-r32gtst-single-pump-hanger-kit-billet-hat-6-v3-fpg-089?gQT=2  
    • Thank you so much for the help
×
×
  • Create New...