Jump to content
SAU Community

Recommended Posts

hey guys, i have a r33 gtst skyline and have just reciently intstalled the apexi PowerFC and hand controller. The rest of the car is pretty stock, except for 3in exaust. The FC is still in its base tune. What i have noticed though is if i give it a bit, it's not too hard to get the FC to flash up 100% duty cycle for the injectors (or close to it).

whats the most logical cause for this, injectors or fuel pump on the way out?

leigh.

Link to comment
https://www.sau.com.au/forums/topic/37231-100-injector-duty/
Share on other sites

Most logical cause is the the base map is set up for greater fuel delivery to take into account more mods than you have (ie is tuned rich).

Get it on a dyno and tune according to the air/fuel ratio. Will probably find that you'll gain power as well as reduce fuel consumption.

Link to comment
https://www.sau.com.au/forums/topic/37231-100-injector-duty/#findComment-745695
Share on other sites

Guest INASNT
just get GT-R injectors ,pump,FMIC,POD and youll fly .. 13 seconds garunteed.

that wouldnt cost you much.. how much boost are you running ? you must be on atleast 11psi to max out the injectors and fpump

bahahaha!!!

U have obiliously have not done any of these in your car have ya?

B33st

If u got stock everything else then ur injectors shouldnt be maxing out.

Get the injectors ultrasonically cleaned and checked coz they must be a blockage somewhere, or your fuel pump is cactus. Also if u continue to drive your engine will be pining up high with the base maps

Link to comment
https://www.sau.com.au/forums/topic/37231-100-injector-duty/#findComment-750702
Share on other sites

I have already purchased new 044 fuel pump, sx reg, surgetank. Also no the way are a Greddy Plenum, Q45 afm + throttle body.

Had just put the FC in and given it a bit or a run to see how it would go. Ran like normal, except for the fact that the hand controler was easy to get to show 100% duty, never showed more than 17 on the knock meter though.

as soon as i get the plenum etc, will installing all the bits and taking it to ARE (QLD) for custom cooler / piping job.

then its time for a tune, and i guess i will find out if new injectors are needed too.

leigh.

Link to comment
https://www.sau.com.au/forums/topic/37231-100-injector-duty/#findComment-751564
Share on other sites

yeah am working towards the turbo...

I wanted to do my build-up in 2 stages.

1. support systems

2. big turbo and big boost.

i pretty much have all the support items now(see last post). so ill get them installed + tuned and it'll then just be a matter of waiting till i have the funds for the turbo.

leigh.

Link to comment
https://www.sau.com.au/forums/topic/37231-100-injector-duty/#findComment-753226
Share on other sites

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

    • Nope.    Grab a varex and turn it down as you get close to home, win win? 
    • So, I've had my V36 for about a month now and have already copped an "excessive exhaust noise" notification from QLD TMR, reported by someone in my local area. It's a twin as per the original, and can have a bit of a throaty note to it when idling cold 😄 and if I do get up it a bit, it can be noisy, but it did pass a roadworthy inspection before sale, so.... ... but in the interest of being a good neighbour, I do want to quieten it down a bit. Is anyone here running a quiet aftermarket cat-back on their V36 or 370Z? And the big, bold question: does an aftermarket cat-back really make much of a performance difference on these cars?
    • The wiring diagram for the R33 RB25 is freely available, and is essentially the same same as most other RBs (just with differences as to which pin # does which job). To get the ECU to power up, you just need to provide power to the ECCS relay, and have the other power feeds that come in from the top left of the wiring diagram (wrt the ECU) that give perma power to the fuel pump relay, the ECU itself, etc etc, all connected. When you put power on all these it will just come to life. It's pretty clear from the diagram what needs to happen. Just follow the lines from the 12V + supply stuff in the top left over towards the ECU. I've even posted snips of such diagrams (not for vanilla 25, I think for Neo and 26) to various threads here in the last few months, talking about what it takes to get the fuel pump and FPCM up and going. Search these up and they will help get you started on doing the same with the vanilla 25 diagram. Hell, for all I know, I've done the same with that one in years past and have forgotten.
    • Yep...so unless someone posts up the answer you will need to probe from the ECU connector to the dash plug with a multi meter in continuity mode to trace the wires.  Note the ECU has multiple - and + (and across different key settings - Battery, IGN and Start) and most likely the power is fed from the connector(s) that is normally near the left hand headlight.
    • Thanks Duncan, I am actually just trying to get the Rb turning and running with the RB25DET S2 original loom itself  I am just trying to get it going outside the body and not thinking about the S15 or trying to match anything to the S15 loom at all I am only trying to see if anyone has done this and what pin they found to be the ignition trigger and ECU+/- on the dash connector, that's about it. Thanks  
×
×
  • Create New...