Jump to content
SAU Community

R33 Injector Missfire With Emanage Ultimate

courier33

By courier33,
in Engines & Forced Induction

 Share

Recommended Posts

courier33 Enthusiast

courier33

Posted
Posted

I have installed my emanage ultimate and found I have an intermittent missfire. Mainly at idle and when holding around 5% throttle at any revs. After doing a datalog on the emanage, the missfire looks like the injector duty cycle is spiking to 99% intermittently. This is on the input duty cycle coming from the standard ecu. I have double checked all of the connections and no fix. It seems to be only one cylinder at a time missing (same cylinder or different ones im not sure) Car runs fine under load and the injector duty cycle acts as normal. I have noticed a few times when backing off from high rpm's, the duty cycle will spike up to 90 -95% and then gradually decrease to about 80% with the revs before dropping back down to 5% where it should be.

Does anyone know why the standard ecu would be spiking the injectors to nearly 100% duty cycle intermittently? Stuffed ecu or could it be something else like CAS. Attached the datalog for anyone who has the emanage log viewer showing the duty cycle input spikes.

r33.zip

Shano3000 Proficient

Shano3000

Posted
Posted

I had the EXACT same problem with my R33 using an emanage ultimate. Had me and my tuner stumped, Would spike the injectors to 99% duty cycle for a split second whilst at light throttle.

Have heard that this was a fault with some EMU's, not too sure how true it is though. I ended up selling the EMU and getting a pfc instead, Cheers shane.

courier33 Enthusiast

courier33

Posted
  • Author
Posted

Damn thats not what I wanted to hear! Re-soldered all of the contacts again, still doing it.

The board I have is a D board although its a late serial number : 05076.

Also had a look at the bottom of the circuit board, and it looks like the aluminium retainer rail of the case is coming into contact with the tiny contacts on the board. Ran a length of insultation tape over the length of the board as a precuation.

Haines Rising Star

Haines

Posted
Posted

mine does it too

I Have bought a Injector adapter harness but havent put it in yet (dont know if it will fix it ,but they say its to stop it running rich)

I also found that when it was missing at idle if i upped the revs to around 800Rpms it would go away

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kinkstaah
      R34 Gtt Wheel Offset Advice

      By Kinkstaah · Posted

      This is a recipe for disaster* Note: Disaster is relative. The thing that often gets lost in threads like this is what is considered acceptable poke and compromise between what one person considers 'good' looks and what someone else does. The quoted specs would sit absurdly outside the guards with the spacers mentioned and need  REALLY thin tyres and a LOT of camber AND rolling the guards to fit. Some people love this. Some people consider this a ruined car. One thing is for certain though, rolling the guards is pretty much mandatory for any 'good' fitment (of either variety). It is often the difference between any fitment remotely close to the guards. "Not to mention the rears were like a mm from hitting the coilovers." I have a question though - This spec is VERY close to what I was planning to buy relative to the inboard suspension - I have an offset measuring tool on the way to confirm it. When you say "like a mm" do you mean literally 1mm? Or 2mm? Cause that's enough clearance for me in the rear :p I actually found the more limiting factor ISNT the coilover but the actual suspension arms. Did you take a look at how close those were?
    • Kapr
      What brakes on R34 GTT(Europe)

      By Kapr · Posted

      @GTSBoy yeah sorry i know thery are known for colors bud those DBA are too in colors 🙂 Green will be good enough for me  
    • Duncan
      Unpeeling the Orange

      By Duncan · Posted

      That's my life. Past-Duncan has a lot to answer for
    • jez NF
      The Evolution Of "night Fury"

      By jez NF · Posted

      Yep four point harness. Mounted to a bolted in brace running behind the seats. Dont use it for daily driving tbh but good to have for when its needed plus it looks cool.
    • Peeeeetaaah
      R34 Gtt Wheel Offset Advice

      By Peeeeetaaah · Posted

      I had to double check the thread title r34 gtt offset advice lol. Thought maybe i posted on the wrong thread. 😂
×
×
  • Create New...