Grounding

[duc24u]

Ok , I almost have the 907 kicked however, I cannot seem to get enough ground from the ecu to give me spark to the injectors. I can get spark when I ground to the frame or battery. I know I cannot just keep it grounded that way. Any sollutions as far as the cpu I have contacted Carmo electronics they rebuild these to spec I guess. Waiting to hear back actually. I understand the grounds pulse to power everything. But how do I know the actual ecu that I have is the one supposed to be on the bike? I see so many different numbers for the ecu's

[angelix]

The 907ie had the MARELLI P7 there were NO others.

big and square, impossible to

someone tried the P8 (same connector, same case , different motherboard and in theory could be swapped with the P7) but i do not have direct experiences.

you have been posting quite a lot lately, has the bike been modified?

if you aree missing the ground, just add d it, no?

[duc24u]

The ground comes from the computer, I believe if I add a ground the gas would be flowing all the time and then I would have no control of the amount for proper mixture. No the bike has not been modified. I purchased it from someone who has not ridden it in a long time due to electrical problems. I have found most. This has been a dream bike for me and I just want to bring it back to life.

[Tamburinifan]

Some info here: http://www.endless-horizons.net/efi/efi.htm

[du907]

Here are pictures of the ECU that should be in the bike. This is a USA bike.

[persempre907]

right ecu (IAW043) with Italian (EU) chip: the USA computers had some different chips with a leaner mixture.
Ciao