Bike turns over but won't start
I recently picked up 2005 F4 750 SPR. The bike ran when I looked at it a few weeks before the auction and when I got it home a few days ago the battery was too flat to turn the bike over. I charged it up fully (it's a new high quality battery) and the bike goes thru the gauge initialization sequence just fine and cranks with gusto but won't start. After doing quite a bit of searching on this forum and checking out a bunch of stuff here's what I know:
Battery is fine-lots of juice
Checked all the obvious stuff-kill switch, stand, gear selector etc.
Checked all the fuses-all fine.
I do not get the whine from the fuel pump when I turn on the key but if I jumper the relay it runs and pressurizes just fine but still won't start.
Checked the main relay on left side by start solenoid and redid a crappy repair of the diode just for preventive issues and the relay does what it is supposed to do. Power is delivered to the fuel pump relay etc. but after tracing the wiring it seems that control of the fuel pump relay is by the ECU and it's not giving the signal to energize.
Jumpering the fuel pump relay (pump pressures up) gives no joy. No fuel smell at exhaust. Injectors probably not firing.
No spark either.
I have given the harness a once over for any obvious damage etc. but found nothing. It seems to me as if there is some sort of safety that is shutting down all of the systems. Tip over switch? Something similar?
I'm not familiar with this bike and I don't see anything in the wiring diagram that looks like it would do such a thing. All of the other electrics work fine. The bike was running several weeks ago and it ran fine. I'm stumped. Bad ECU perhaps?
Thanks in advance for the help. I really want to ride my new bike and the weather is 80 degrees. Its killing me!
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