Rb30 Will Start No But Not With Apexi Ecu?!

[leeroy_25]

Following my previous post I have made some progress! I had the injectors out and cleaned. Checked and checked again for loose or damaged pipes. reset the ECU again, Tried a number of settings for the injectors.. Removed the idle control valve and cleaned it.. No good.. Car will not idle. If you keep blipping the throttle it's fine. but if you try and hold it at any rpm.. (I was only brave enough to go just around 3k) then it will die. I think at one point we had it idling around 2k but as soon as the rpm dropped it died.

Tried unplugging the MAF's to get limp mode and it wouldn't even start.

So I thought jsut for curiosity I would put the stock ECU in and see what happened.

Turned the key and it barked into life perfectly! Idle was smooth as you like even picked up fine with a slight rev.

So, clearly my problem is something relating to my Apexi ECU.. Couple of points..

1)Will the boost control kit setting being on if you don't have it fitted cause this? Is it set on from factory or off? As it is in japanese so I cannot tell! I read it must be off if not connected.

2)I read some ECU's have glitches which can be cured by unplgging the commander?!

3) Looked in the sensor check screen after the car had been run and stalled and noticed that the following had the circle next to them highlight.

IGN, ECC, WRN, IDL

I gather the stock ECU is more forgiving against sensor faults so maybe one of these is the issue although I don't know what they are so can someone shed some light please?

Any other thoughts as to the problem would be great.. It was good to finally hear it run properly though!!

Cheers

Lee

[TiTAN]

have you done a factory reset/restore on the powerfc? do you have a wide band O2 sensor/guage? if its running massively rich or too lean you can keep it running with the throttle but it wont idle. (what mine did when the ECU was first installed)

[johnbarry88]

tps?

[jarrod83]

I've always had to disable the power fc boost control function to get them to start without a boost controller kit fiited

The off setting has 2 symbols, the first looks like a plus sign, the bottom bit curves off to the left. The second symbol is best described as a smiley face, almost looks like a semi-colon then a curved right bracket.

What power fc model are you using?

[Gtir-keiron]

Dude take it to some one who knows what they are doing with the apexi.

Drive it there on the standard ecu don t make boost just gingerly.

I have heard of people losing there tune out of a apexi due to unforseen isssues like disconections and what not.

If you paid some one for a tune on your car they will almost shorly keep a backup of the tune.Take your apexi to them and have them load your tune back on the apexi then you should be golden.

[R31Nismoid]

The PFC does not lose a tune because of disconnection, only a full reset or a power surge (like any other ECU).

[leeroy_25]

Thanks for all the replies guy's.. Hopefully it is just bad luck and the apexi basemap won't run the motor? I will look at the boost control setting to check that. I have reset the ECU for clarification.. No tune on it just the factory settings and my upgraded injectors.

Jarrod83 - I will have to check the model. I presume you mean what serial number version?

I have no wideband to check fuel mix. But have tried a number of settings on the fuel injectors to richen or lean it out and they make no difference at all. Worse case I can take it to a tuner and swap the ECU in there but I wouldn't mind trying to solve the issue first incase it is a sensor and not the ECU otherwise it's a wasted trip. I will need to get someone to trailer it for me as it is not taxed or MOT'd yet!

On a seperate note.. Keiron.. is that your car with a R33/R34 conversion? Pic link please! I did not know that conversion existed. R32/R34 yes.. I have to say the Best bit of the 34 is the front end would like to see how they go together.

Cheers

Lee

[TiTAN]

are you making adjustments for the injectors and the AFM's if they arent stock? if you can try your ecu in another car and rule that out as the faulty item i would try that before you go nuts with the multimeter checking sensors.

here is keirons car thread http://www.skylinesaustralia.com/forums/Ke...-W-t282550.html

[leeroy_25]

Thanks for the thread link and info. I am on stock AFM's and have put in injector correction. I will try to check boost kit is disabled. if still no go then I need to get the ECU checked for sure.

Lee

[leeroy_25]

Jarrod.. You the man!!

We are cooking on gas.. Sure as hell the boost kit is set to on from factory! Who's stupid idea was that?! So a hell load of grief and worry for a simple yes or no.. allbeit in Japanese!

Cheers guy's

Lee