need help with ms2 extra code

[der affe]

i just installed an ms2 extra on my 1991 325i.

the motor is a 2.7i with dbilas 292* cam, 22lb hour gm 6 pintle injectors, ebay headers, dbilas ITBs. the ms2 is runing wasted spark. i purchased it from chris325ix and i was known running before he replaced it with ms3.
the tunes is installed, the sensors are calibrated, but it does a crank no fire.

i pulled the plugs and they are dry.

so next i did a fuel system check, everything checks out at the relays and the fuse box. next i pulled the return line from the fuel rail and cranked it over into a bottle. tons of fuel getting to the rail.

that leaves me to believe that the injectors are not opening.

how can i check this?

will i see it in the datalog on tuner studios?

what will it look like and where?

what would be triggering the injectors to open? maybe there is a ground issue to the ecu or do the trigger off of the coils?

it is using a modded stock harness from a same year ix with an airbag ( although i have removed the airbag if that makes a difference).

the tune is installed, the sensors are calibrated, everything should be ready to go. unfortunately for me there seems to be few people in az running ms on their BMWs so i don't really have anyone local to help out.

i am new to ms so i am a little in the dark on doing diag.

thanks in advance!

[der affe]

i also just did a spark test and pulled the number 2 coil wire and stuck a welding rod in it and held it to one of the valve cover studs while i had my roommate crank it. no spark came out of the end of the jumper wire.
first, will that work for a spark test or do i need to pull a spark plug and ground that insted to check for spark?

[der affe]

i cranked it with a spark plug and it does indeed have spark. it does spark once when you turn on the key.
is it supposed to do that?
it cranks and sparks like normal though.
still no injector firing.

[whodwho]

Did you have to rejumper the wires at the main relay or did he have a circuit built for that? It seems to be working if you have spark and fuel pressure...
Do you have TS connected and can you see any inj PW?
Make sure that you have the TPS working correctly or make sure it is not > 70% or it will cut fuel.

[der affe]

I can see pulse width in tunerstudios. Tps is good. No idea on the board as I did not build it.

[der affe]

The ecu seems to be getting really hot too. I have the battery charger set on 40 amp charge becausei am cranking a lot.

[whodwho]

Careful leaving it powered up and not running, sounds like your ignition drivers, It might help to post up the msq to see how you are configured.

[der affe]

I am not getting a signal to the injectors from the ecu. It is telling it to fire though. Jam going to chase down the short or most likey the bad connection in the harness.

[nando]

you won't fry the ignition drivers. they are self protecting BIP373s (they shut down if they get too hot). The coil is not energized if the car isn't running, anyway. I've spent a lot of time on this ECU. :)

I have some other ideas, if you could call me at lunch, or I can call you..

[whodwho]

It would still concern me if it is getting hot??

[nando]

yeah, I don't know, how hot? I'd expect it to get warm. You're familliar with microsquirt, what would happen if you accidentally set the microsquirt pins on a regular MS2/e installation?

[whodwho]

It jacks up spark setting but I don't believe anything with fuel

[nando]

He's getting good spark. his injectors seem to be doing wierd stuff though. I'm going to have him zero the prime pulse curve and check the injector grounds again.

[whodwho]

Injectors should be grounded thru the drivers??

[nando]

right, to switch them on. this is what he found when he checked them:

> Brown and white stays nuetral until the key turns off and goes to ground for
> 3 seconds. Brown and yellow stays ground, turns off for a second as the key
> is turned, then goes back to ground.

I'd expect them to go to ground with key on (prime pulse) and then stay floating otherwise.