Jump to content
SAU Community

Mussy

Members
 View Profile  See their activity

  • Posts

    26

  • Joined

  • Last visited

  • Feedback

    0%

 Content Type 

Posts posted by Mussy

    R34 gt4 non turbo to rb25det conversion

    in RB Series - R31, R32, R33, R34 (1986-2002)

    Posted

    5 minutes ago, GTSBoy said:

    Nah, actually it's fine. I had a little look see at the stock** timing map, and in the conditions you were running, 3700rpm and no load, 50 is actually the correct value.

    ** Stock, but stretched on both the load and rpm axis. But the values in the main part of the map are essentially the same as stock.

    image.thumb.png.3f02b3766dbf0331170dfeb99c012551.png

    Glad you sent this got me thinking about cambelts and all sorts 😂 so i guess everything is fine but still no cold start high idle arggghh

     

    only thing left to do now is compare data from an actual r34 gtt turbo and compare

     

    there must be something i must have missed out 🙈 hope its not ome of these posts where there is no result 😂

    R34 gt4 non turbo to rb25det conversion

    in RB Series - R31, R32, R33, R34 (1986-2002)

    Posted · Edited by Mussy

    1 hour ago, GTSBoy said:

    Nah. My neutral switch is working and the ECU doesn't give 2 shits whether it's in Neutral or not (when it comes to idle speed, that is).

    Might be more the case that your knock sensor is telling fibs and making the ECU freak out and pull timing. Have you verified the actual timing at the crank?

    I think you should hook up a Consult scanner of some sort (an actual scanner or USB software one like NissDataScan) and see what the ECU is doing. You will be able to see what timing it is commanding, how many "steps" it is putting out to the IACV, and various other things that might be instructive. Not taking advantage of the fact that you can connect to the ECU and see this stuff is really making it hard on diagnosis of weird shit like this.

    Good point, as i had to re wire the knock sensor plugs, not sure if i switched them while wiring left on right and right in left. Timing will check and get onto datascan. Thank you guys 😎

    R34 gt4 non turbo to rb25det conversion

    in RB Series - R31, R32, R33, R34 (1986-2002)

    Posted

    Hi alot of trouble shooting later, repaced the dump valve back to standard idles better no cutting off, still no cold start, changed iacv, coilpacks, theottle body, iat sensor, as inahve two sets of everything still no change.

     

    now i may think it is ecu related as the ecu installed into r34 is  from a neo stage 4wd rb25det but it is auto my car is manual from factory.

     

    Thanks for the reply guys dont know how to

    reapons individually yet 🙈

     

    attached is picture of ecu

    IMG_0001.jpeg

    R34 gt4 non turbo to rb25det conversion

    in RB Series - R31, R32, R33, R34 (1986-2002)

    Posted

    Hi, was wondering if anyone can help with my issue would be much appreciated.

    r34 gt4 4wd non turbo originally

    installed stagea 2.5 turbo 4wd engine into r34

    got it running just fine with some niggly issues

    few questions

    idles at 900rpm cold or hot, ideally when cold should idle high and then drop. It sits consistently no missfire or cut off. Power to idle control valve is present, tps set correctly, diagnostics code 55 no faults. No engine light also.

     

    currently using stagea turbo ecu would that cause a conflict?

     

    injector resistor, not installed is this important? Will it need to be installed?

     

    4wd light is on also , front abs sensors need replacing as they broke and are not on vehicle hence abs light is also on. 

     

    Thank you in advance any support would really appreciate.

     

     

     

    Wanted c34 260rs ecu 23710 0a903

    in Stagea Parts Classifieds

    Posted

    Hi thanks for the reply, doing a conversion to r34, thought maybe would get it up and running on current setup might be easier then replace with aftermarket.

     

    As this engine has single turbo conversion, 800cc injectors, hks pro v ecu linked into standard ecu. Has no airflow meters, The standard ecu got water damaged.

     

    based on above tuning parts thinking would be easier to source ecu plug in and start, or would i be better to get aftermarket ecu and teach the above mods, sorry not sure on aftermarket ecu 🙈

×
×
  • Create New...