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This thread seems like an unintended advertisement for carburetors. The advances in fueling and emissions made possible by FI can sometimes be offset by the occult mysteries involved in troubleshooting FI systems. I hope I never have to get into my 390 Duke's FI. Flawless to date, but fingers crossed.
Beyone here there be dragons.
Does it die completely or will it come back if you close the throttle?
It has a power commander. Should I think about unhooking it?
I just went through an issue with a similar era Guzzi, it would run until it got warm then stop for a while.I finally convinced the owner to attach a light to the two ECU relays, this can tell you a lot about what's going onIf the ECU relay drops out its an electrical fault before the ECUIf the Pump relay drops out it's the Engine timing sensor.On his neither light dropped out as it stalled but the pump relay did a few seconds later pointing to a faulty timing sensor.You didn't change the gasket on the sensor did you, the gap should be 0.6 - 1.2 mm
No it dies completely. Instantly.Steve, I have some new GCIs, I'll give it a go after a bit.
Not to belabor, Chuck, but have you determined what dies? Do you lose spark? Fuel pump? Everything? Does the headlight stay on? What does the battery do during this?
Seriously, it's hard to tell. It's instant. Yes the headlight stays on. I'm betting it loses spark, but I haven't tried it. Fuel pump isn't running when it quits. Battery doesn't care.I'll hook up a plug tomorrow and make sure it's ignition but it certainly acts like it. I've never seen anything like it.. it just seems perfectly normal and stops running. No hesitation, nothing. There is a fair amount of stuff unhooked now, I'll fool with it some more tomorrow.
It has a power commander. Should I think about unhooking it? It appears to be wired in..
How is fuel pressure and delivery rate?
Chuck, Want to see if the PC is the problem? Just disconnect the ground wire.
The PC should have a male & female plug the same as ECU, just plugged in like an extension cord.
Hooked up my el cheapo HF inductive timing light that I bought when I had my fancy one out in SoCal, and it's flashing away. It stops exactly when the engine dies. Sounds like ignition, probably.I'll try to rig up some of KRs lights on the relays next.