Jump to content

Brody Walker

Members
 View Profile  See their activity

  • Posts

    16

  • Joined

  • Last visited

 Content Type 

Posts posted by Brody Walker

  3. Fuel Temp AFR Impact

    in G4+

    Posted

    G'day legends,

     

    I have a G4+ running my Rb25det neo setup on flex fuel using the modelled fuel mode. The problem im facing is my AFR's lean out after a heat soak. I have 2 logs, one was the first drive of the day with AFR's a bit rich, 2nd was after the car sat for an hour or so & the day warmed up resulting in lean AFR's.

    I suspect this is due to my fuel temperature not IAT/charge temp. The reason for this is I have compared 2 identical spots in the logs & the the difference is fuel temp, see below

    Log 1 (no heat soak)

    • RPM: 2019
    • Lambda: 0.978
    • IAT :43c
    • ECT:90c
    • Charge Temp: 44c 
    • Fuel Temp: 47c
    • Inj Eff pulse width: 1.084

     

    Log 2 (heat soak)

    • RPM: 1930
    • Lambda: 1.088
    • IAT :44c
    • ECT:88c
    • Charge Temp: 45c 
    • Fuel Temp: 59c
    • Inj Eff pulse width: 1.070

    I also noticed the higher my fuel temp was the leaner my AFR's got. I stopped the log but fuel temps got to 63c whilst in my driveway & AFR's went to 17:1. This issue doesn't seem to happen when I have e80+ in tank, only when the E% is lower which was E34 during this drive. I have twin walbro 460's in tank running all the time which I know causes fuel to heat.

    The question is, any other thoughts on other causes for this or have I got it right? Then is it possible to build in a fuel temp correction map? 

    Map uploaded, can send logs across too if needed. 

    Idle tweaks 03-01-24.pclr

  4. Hunting on idle once up to temp - Ethrottle

    in G4+

    Posted

    Hi all,

     

    Hoping to get some help. I have a Bosch DBW throttle hooked up to be R34 Gtt with a g4+ & never been able to get the idle just right. It does the below:

     - Coming to a stop it hunts 3 or 4 times before sorting itself out. In some cases it dies. The hunting almost always occurs but the dying only happens when at operating temp. I adjusted the ISC Base position up from 0 to 0.6 for ECT 70+ which seems to have helped with the dying. 

    - When rolling in neutral or with the clutch in it hunts the whole time the car is rolling & sorts it's self out once I'm stopped. Here's a log of it, check out from 40 to 1:22. TP is steady, don't have VCT kicking in, can't seem to see something else at play.

     

    Thanks for your help.

    Idle Hunt when rolling 10-12-22.llg Idle adjust 2 10-12-22.pclr

  6. Wheel speed sources R34 GTT

    in G4+

    Posted

    Hi all, I have a G4+ plug n play in my r34 gtt & trying to setup traction control.

    I have vehicle speed which is sourced from DI4 & looks like I can set that as any of the 4 wheels to get a speed reading. Where I'm falling short is I need to set driven & non driven speed sources to setup traction control.

    Whilst DI4 is currently set as LF wheel speed, do I need to splice into a speed sensor & assisgn it to one of my spare Digital inputs as LR as an example to get both driven & non driven speeds or is there another way to do this?

     

    Thanks for your help.

  9. Ethrottle Link NGTT+

    in G4+

    Posted

    Great thank you. I have mounted it & now a little stuck. I'm getting error 5: TPS (main) Movement zero when trying to calibrate the TPS.

     

    I have calibrated APS & can see movement on the E-throttle 1 Target table when I move the pedal. I can also see movement in TP main % when I move the throttle plate by hand. Throttle is set to keep running when stalled & PID settings are as per help guide.

    Have a missed something with my wiring or setup? Wiring as per below:

    I have the external module wired up as per below:

    • Aux 4 - Signal 1
    • Aux 8 - Signal 2
    • Ign 8 - Ethrottle relay1
    • Motor + & - to throttle
    • 14v from a switched source (I used the 14v wire left over from my IACV wiring)

    I have Bosch 74mm TPS wired up as per below:

    • AN volt4 - TPS 1 (assumed this is TPS main)  (error low 0.10v, error high 4.90v, error value 0v)
    • AN volt5 - TPS 2 (assumed this is TPS sub)  (error low 0.10v, error high 4.90v, error value 0v)
    • Ground sensor shared with APS
    • +5v shared with APS

    I have 350z pedal APS wired up as per below:

    • AN volt9 - APS main (error low 0.01v, error high 4.90v, error value 0v)
    • AN volt10 - APS sub (error low 0.01v, error high 4.90v, error value 0v)
    • Ground sensor shared with TPS
    • +5v shared with TPS

     

    Any help would be great.

  11. Ethrottle Link NGTT+

    in G4+

    Posted

    I'm switching to ethrottle on my R34 GTT with a G4+ plugin. Ive read through all the wiring diagrams ect. The ethrottle auxiliary output setup states to use aux4 for signal 1 & aux9 for signal 2. 

    I've had a look at the pinout & there is no Aux9. Can I use aux8 which is assigned to my CEL instead or ignition 7/8 aux out on the expansion loom?

    If not what do I need to do?

    Thanks for the help.

  12. Link knock light

    in Link G4

    Posted

    Hi there, I've been running a link knock light for about 3 years now & it use to work great. It would turn green the moment the engine started.

    For the last few months it no longer turns green when I initially start the engine, it takes a engine load/revs to register the engine has started. It's gradually been getting worse & now doesn't register unless it's at full load or at 6000+ rpm.

     

    I bought another sensor but it still does the same thing. Is there anyway to reset the unit?

     

    Thanks for the help.

  15. Link plugin ecu r34 gtt

    in Link G4

    Posted

    Hi there,

    I have somehow hidden the "config" & "tuning" pages as seen in the attached. All I can see is the "logging" screen. I have opened previous saved maps & connected the laptop to the ecu but it still only displays the "logging" screen.

     

    Is there a way to get it back without creating whole new pages?

     

    20151205_164655.jpg

  16. Link in 34Gtt

    in Link G4

    Posted

    Hi guys & girls. 

    I have fitted a G4 plug n play to my r34gtt skyline. Whilst calibration I noticed that when I turn the key off the dash lights & gauges remain on, the radio however turns off. The only way to turn it off is to disconnect the battery. Power is still going to the ecu too.  

     have a auto watch security system installed if that's any help.

    Has  anyone ever had this issue before or know what it could be?  

×
×
  • Create New...