I recently picked up a Ducati monster 620 in non running condition. The old owners rode it often until the bike didn't start one day, so they took it into the dealer to get a diagnosis. They were told that the fuel pump had gone bad and bought a replacement, but never installed it. I tested the old pump just to be sure that was the issue, and found that it was seized. After installing the new pump (chinese) and replacing the battery, I decided to try to fire up the bike. I turned the key and primed multiple times and the pump sounded like it was doing its job.
Unfortunately though I primed and primed and applied the choke, the starter just cranked and cranked and the bike never fired. I put the fuel hoses into the pump assembly correctly and the lines were getting fuel, so I suspected that the injectors were clogged. Luckily they didn't store the bike with fuel in the tank but one of the injectors didn't click when tested. I've already cleaned the injectors with an ultrasonic cleaner while opened up and sprayed carb cleaner directly through them. The spray pattern looked great and they now seem to open as they should. Resistance was 15 ohms for each injector, and 8.8 volts to each wire harness going to the injector, which doesn't seem like enough. When I hooked an injector directly to a 12 volt battery and cranked the bike it sprayed as it should, so it really can only be an issue with getting power to the injectors. Any thoughts on where to start?
Oh yeah, the bike did fire up for me when I poured a little fuel in the intakes. It runs just fine like that but obviously won't stay running without the fuel injectors doing their job.
Unfortunately though I primed and primed and applied the choke, the starter just cranked and cranked and the bike never fired. I put the fuel hoses into the pump assembly correctly and the lines were getting fuel, so I suspected that the injectors were clogged. Luckily they didn't store the bike with fuel in the tank but one of the injectors didn't click when tested. I've already cleaned the injectors with an ultrasonic cleaner while opened up and sprayed carb cleaner directly through them. The spray pattern looked great and they now seem to open as they should. Resistance was 15 ohms for each injector, and 8.8 volts to each wire harness going to the injector, which doesn't seem like enough. When I hooked an injector directly to a 12 volt battery and cranked the bike it sprayed as it should, so it really can only be an issue with getting power to the injectors. Any thoughts on where to start?
Oh yeah, the bike did fire up for me when I poured a little fuel in the intakes. It runs just fine like that but obviously won't stay running without the fuel injectors doing their job.
