Has this fuel gone bad?

[cozmoid]

I had this same problem with my 2T GEU and it was the ECU not getting very good signal quality from the coil for the injector pulse. Turns out the wire was a little loose!
You could also have a very sorry fuel pump and fuel filter

Sorry but no definate answers but maybe something to check.

I am pretty sure that if you take the cover off your ecu all the plug codes are there and the injector signal to the ECU should be easy to find. Labelled INJ. Just put a test light on it and turn it over. It should blink nice and steady and consistent.
There is also a little led things you can plug in to your individual plugs at the injectors to check if they are firing consistently too.

[sergei]

I had this same problem with my 2T GEU and it was the ECU not getting very good signal quality from the coil for the injector pulse. Turns out the wire was a little loose!
You could also have a very sorry fuel pump and fuel filter

Sorry but no definate answers but maybe something to check.

I am pretty sure that if you take the cover off your ecu all the plug codes are there and the injector signal to the ECU should be easy to find. Labelled INJ. Just put a test light on it and turn it over. It should blink nice and steady and consistent.
There is also a little led things you can plug in to your individual plugs at the injectors to check if they are firing consistently too.

That sounds like analogue ECU.

If it backfires in the intake and pushes against starter it is most likely timing issue (too far advanced), or position signal too noisy (are you running a link?).

[cat007]

edit: Also sometimes when initially cranking, it tries to fire against the starter, but only at the start

You get that when ignition timing is too far advanced.

Steve

Hmm ok. I've checked the static timing and it's fine and the map is the same one as it was tuned for. So not sure what the hell is happening.

I'll lower the overall timing and see what happens

Cheers

[cat007]

I had this same problem with my 2T GEU and it was the ECU not getting very good signal quality from the coil for the injector pulse. Turns out the wire was a little loose!
You could also have a very sorry fuel pump and fuel filter

Sorry but no definate answers but maybe something to check.

I am pretty sure that if you take the cover off your ecu all the plug codes are there and the injector signal to the EC

U should be easy to find. Labelled INJ. Just put a test light on it and turn it over. It should blink nice and steady and consistent.
There is also a little led things you can plug in to your individual plugs at the injectors to check if they are firing consistently too.

That sounds like analogue ECU.

If it backfires in the intake and pushes against starter it is most likely timing issue (too far advanced), or position signal too noisy (are you running a link?).

Running an EMS stinger ECU.

I'll recheck the timing however nothing has changed since it was last running.

It only fires against the starter on the first initial crank then it doesn't do it again...

[tsoob]

sounds like timing to me.. is the base timing in the ecu setup right? I remember setting up my new computer was a real prick to get right

[cat007]

sounds like timing to me.. is the base timing in the ecu setup right? I remember setting up my new computer was a real prick to get right

Yeah I checked the static/base timing and it's spot on. I'm going to take the loom out again and check that all the plugs are on ok and make sure there's nothing that could be introducing noise to the signal wires...

[tsoob]

yep cas wiring was also a $&#$%, the signal had 2 be reveresed or something silly like that, as in the ecu was reading it backwards.

[cat007]

yep cas wiring was also a $&#$%, the signal had 2 be reveresed or something silly like that, as in the ecu was reading it backwards.

Oh yeah? Like the fire edge is set to falling and it should be rising or something?

[cat007]

Here's a video of what happens after it finally starts and I try and rev it....

http://www.youtube.com/watch?v=a6C3K6j7eB4

[MAGN1T]

AFR is all over the place.
Maybe your computer has got spiked?
Did you save a backup to reload it with?

Steve

[cat007]

AFR is all over the place.
Maybe your computer has got spiked?
Did you save a backup to reload it with?

Steve

I've reloaded various maps on there, including one I made when I first put the ECU in, which did allow the car to start and run pretty well - but even with that map it doesn't run.

Here's a video of what happens when cranking:

http://www.youtube.com/watch?v=ZHcoFiJ8wKQ

I'm having issues with the wideband cutting out when cranking, I think it's a voltage drop thing, but that should've have any effect on the ECU as the wideband is only monitoring the AFR, and not adjusting it.

[Bling]

It's not an issue with the battery?

[cat007]

It's not an issue with the battery?

How so?

[MAGN1T]

Did you check the fuel pressure and the flow out of the reg?

Steve

[cat007]

Did you check the fuel pressure and the flow out of the reg?

Steve

Fuel pressure is good and flow out of the fpr is good

[cat007]

Changed the plug gap, not sure what too as I don't have a feeler gauge, but once I did that the engine starts pretty easily now. Not as easy as it used to, but it at least starts now. Trying to rev the engine however will result in the same popping and farting around as before - I 'think' it could be a little better now, but hard to say....

I guess I should gap the plugs properly and see if that helps.

0.8mm should be about right?

[cat007]

Ok so gapped the plugs to 0.8, issue remains

Gapped them to 0.7mm and there's no difference

Running out of ideas here

Maybe the ignitor is bung or the coils perhaps? Mitsi V6 ignitor with 3x7M-GTE coils.

[Bling]

It's not an issue with the battery?

How so?

Just thought if the battery was on its way out it might be giving ya ecu grief, which then gives you grief .

[cat007]

It's not an issue with the battery?

How so?

Just thought if the battery was on its way out it might be giving ya ecu grief, which then gives you grief .

Haha. that it does my friend. That it does

But seriously, how could the battery be giving me grief? Inconsistent voltages or something?

[sark.inc]

i thought the AFR should be around 14 or so, not 20+ at idle :s