Jump to content
SAU Community

Recommended Posts

Hey all,

Just got my car back from Unigroup after it was tuned. Noticed now that when its cold, if I drive in first then clutch in to go to second, the car will hold revs at nearly 1.5k before eventually dropping back down. It makes for uncomfortable driving and shifting between gears.

Now I understand when the car is cold that it runs in different modes hence the rpm being higher, but when the car is warm it sometimes presents the same issue. The car was pre tune tested for leaks and other issues, timing set etc. I suspect it might be something to do with the afm but at the same time, I have no idea. The AAC thing has been removed and cleaned about 2 years ago.

Idle is set to 750 - 850 rpm if I recall. ECU is a power FC.

Also have another annoying issue. When starting the car, the hand check engine light will flash and display a knock reading usually between 40 - 60 on startup. I have narrowed this issue down previously and it seems if I have the datalogit connected to my car OR if I have my narrowband feeding a signal to the ECU, it does this. Without either, the car will NOT flash and there is no ping on startup. I don't care about it but its annoying for someone with OCD with everything running right.

Any ideas guys?

I know with my tune and my PFC cold idle is really high as well. Makes it harder to drive but doesn't last long.

My tps was also out and would make the car idle high and hunt. Could be worth checking the tps sensor, very easy with the PFC hand controller.

Can't help with the check engine sorry!

I've checked all sensors and the voltage are in spec. I'll be taking the car back to Unigroup to have the tune finalized after my fuel system us up to scratch.

Do you happen to have the O2 sensor connected?

Sounds like your fuel cut recovery point might be on the high side causing it to do that.

Since you're taking it back to unigroup let them fix it, if not I'll give you a few pointers on what to do to try and fix your issue

  • Like 1

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

    • I'd ask the shop what they used and use that. Mixing coolants is sometimes OK, sometimes not, and you have know the details of each coolant to know whether it's a good idea or not.
    • Is it alright to top up with just another green coolant?
    • thanks GTSboy. My confusion at the moment is i am trying to locate the ignition, ECU battery power and the ECU negative The closest thing i can find is the for the S15 on Page 8 of the Wiring Specialties web page https://drive.google.com/file/d/0B9F33_M_GgENQnZ6STMxVmVNd1E/view?resourcekey=0-eZ4nNRwRoqa1qvKlWWHm8A I cannot find the same diagram for the R33 RB25DET Series 2 dash plug pin out.... Do you know what the Pins? or know where i can find the same pinout diagram for the RB dash plug? Thanks for the advice on the box... i like a 6 speed so might be on the lookout or the box now.. a topic of discussion for another post...
    • Will have a look at that. I cant see any leaks 
    • Put another overflow bottle (ie, a 1.25 coke bottle or similar) under the overflow hose and see if it is being pushed out there or if it is disappearing into the engine.
×
×
  • Create New...