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98 EV1100 dies, then restarts

B

beemermark

Just got it firing!
Joined
Aug 25, 2009
Messages
10
Starting Friday night, cruising down the road and the bike dies. Thought maybe I accidentally hit the kill switch. Coast off the side of the road, lights, horn, everything works but when I hit the start button nothing happens. Toggle the kill switch nothing. After about 5 minutes it took right off. Went a couple hundred yards, repeat. Another 100 yards, repeat again.

Got hope, checked for a loose ground, looked around and can't find nothing abnormal. Ran the bike about 15 minutes while wiggling everything I could think of and found nothing. Took it for a 10 mile drive and everything was fine. Drove it today, died again.

I'm starting to think it's an engine sensor going bad. Any history? Any hints?
 
beemermark said:
Starting Friday night, cruising down the road and the bike dies. Thought maybe I accidentally hit the kill switch. Coast off the side of the road, lights, horn, everything works but when I hit the start button nothing happens. Toggle the kill switch nothing. After about 5 minutes it took right off. Went a couple hundred yards, repeat. Another 100 yards, repeat again.

Got hope, checked for a loose ground, looked around and can't find nothing abnormal. Ran the bike about 15 minutes while wiggling everything I could think of and found nothing. Took it for a 10 mile drive and everything was fine. Drove it today, died again.

I'm starting to think it's an engine sensor going bad. Any history? Any hints?
Click to expand...

I have seen this with a faulty ground on a P8 system. Easiest thing to do is to splice a new ground into the harness near the ECU. I actually ran the wire from one of the bell housing studs to the ground. You can get a system schematic here https://www.guzzitech.com/guzzi007/sportissimo.html Although the schematic for the 98 lists the 15M ECU, that is not what what I have seen on any 1998, at least not in the USA. The pin to add the ground on is 19 on the P8 ECU.
 
Is there a flicker in the lights when the bike dies? If no, I may look towards a fueling issue (filter, etc) too. Post again.
 
It dies just like you hit the kill switch. It's electrical and I also think it's a ground issue. Is the ECU supposed to be grounded? MY BMW's always has a seperate ground wire to the ECU but I do not see one on this bike.

And, John, thanks for the link to the schematic. I have the one from the manual and even with my big magnifier I am unable to read. Guess I better learn some Italian also.

MERRY CHRISTMAS
 
Turns out the problem was a poor ground to the ECU (thanks John Z.). Removed the harness connector from the ECU, removed the one phillip's head screw from the end of the connector and pulled the connector apart. Pin 19 is the ground, the pins are numbered when you remove the connector cover. The existing ground wire is black and tough to pull out of the cable bundle. I cut the wire about 1 inch from the connector entrance, then spiced pigtails on the two cut ends. Then join the pigtails to a new ground wire. I ran the ground wire to a transmission bolt.
 
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