My beautiful S4 is dead at the moment and I'm fairly sure its the ECU that's at fault. Reading all the forums it seems like a common thing with the bikes built in the early 2000s. Nobody seems to mention what actually kills them but someone mentioned 'The Ducati Spark of death' or something.
I like to understand why stuff fails so I can try prevent it happening again, is it Reg/Rect failure that kills them?
Possibly.
If the R/R fails in 'runaway voltage' mode, which I've seen happen, it may get high enough to brick the ECU.
Dunno what that level is, alternator supplies 100+VAC so system can be exposed to that if the R/R really goes bad.
My '02 S4 is on it's 4th ECU in ~50k miles.
OEM unit lost the ignition coil output for the vertical cylinder.
2 FIM U59 units expired, I forget how they gave up.
Must point out that the 2nd unit was a no-cost warranty replacement from Duane at FIM for the 1st unit that gave up.
Their support was outstanding, and they're literally on the other end of the earth.
Currently has a MicroTec in it.
If that packs it in and I don't have any 5.9 style units, I'll do flatslides and an Ignitech.
Or one of the DIY injection kits.
I'm buying no more IAW 5.9 style units.
On my 900ie spark plugs last about 2000 miles. Then it starts to run bad and cutting spark. I just change the spark plugs and it runs fine again. Can it be ecu problem? Now i´m testing cheaper NGK DPR8EA-9 and for now it runs fine.
Quote from: jjake on May 21, 2019, 10:15:43 PM
On my 900ie spark plugs last about 2000 miles. Then it starts to run bad and cutting spark. I just change the spark plugs and it runs fine again. Can it be ecu problem? Now i´m testing cheaper NGK DPR8EA-9 and for now it runs fine.
Start a seperate plug thread here in Tech.
What plugs were you previously using?
I was using previously NGK DCPR8E, these plugs worked fine that 2000 miles. Also tested DCPR8eix (iriduium) and DR9EA and these didn´t work at my bike. S4 and 900ie has different ecu, so problem isn´t same? Are there some link or thread about the ecu problem?
I was adjusting TPS sensor (I have changed it to new). I didn´t understand how to set it corretly by using multimeter but I adjusted it by setting it to the 0% throtte setting on the powercommander program screen. Is this near to correct?
Quote from: jjake on June 18, 2019, 01:53:30 AM
I was adjusting TPS sensor (I have changed it to new). I didn´t understand how to set it corretly by using multimeter but I adjusted it by setting it to the 0% throtte setting on the powercommander program screen. Is this near to correct?
I've never tried to do it that way, but it's a good bit better than just bolting it on.
Best to set it properly.
http://www.bikeboy.org/ducati4vthrottleb.html