Fishfiles -- I did take out the seat and the only solenoid I could find is one that is mounted to the outside of the injector pump, or the gear casing that runs the injector pump. I can't really tell for sure if they are two seperate units or if it is all made together. But you can't see anything operating from the outside. There is a small inspection plate on top of that gear housing that I removed and then I could see the rod for the solenoid operating. It pulls out toward the front of the motor when you begin cranking and pushes in toward the back of the motor when you turn the key off. (This is a 2006 model with a 4-cylinder Kubota engine if that helps any) This is the only solenoid I could find so it has to be the fuel shutoff for the injector pump. The only linkage I see on the motor is the throttle linkage and it appears to be intact and operates smoothly when I move the throttle control. All of the injector lines were tight when I broke them loose to see if there was fuel coming out of the top of the pump. How difficult is it to remove the plungers and clean them? Does that require removing the pump or will they come out with the pump in place? Tazza -- I am assuming that there is something wrong with the injector pump at this point because the fuel pump is pushing fuel all the way to the injector pump intake and the fuel cutoff solenoid seems to be working properly. The machine does not have a primer bulb that I have seen. thetool -- I still get the code but I only get it when I crank the engine for several seconds and it doesn't start. I feel like it may be throwing that code because the computer knows that it is trying to start the motor but doesn't get any feedback that the motor is running in a couple of seconds. I don't suspect a problem with the starting circuit since the motor turns over and the fuel shutoff solenoid activates when you begin cranking. Is there anything else required on the electrical side for the motor to run? Could it be possible that the electric fuel pump is not pumping enough pressure to get through the injector pump? The fuel stream does not have a lot of pressure but I wouldn't think that it is supposed to on an engine like this. It is probably pumping between 3-5 pounds. Is that normal or should it be substantially higher than that? I tried a 4-7 pound pump on it that is brand new and that didn't help any so I don't suspect a problem with the fuel pump but I it is just a thought. Thanks for everyone's help so far. Hopefully I will figure it out pretty soon.
Hmmm.....I didn't think they worked that way, but since you say the fuel shutoff is working, it bears some digging into. If it's getting fuel and air it should run. If the shutoff solenoid is plunging while you crank and stays there after you release the key bak to run, it should run.
And that failure(22-02) won't cause it to suddenly die. I guess you're on the most sensible course with the fuel shutoff mechanics in the pump.
One other thought if you can't find a fuel shutoff problem-was it at high or low engine speed when it died? Is the engine cranking speed okay, or does it seem slow? What I'm getting at is a possible inadvertent hydraulic load failure, the pump is swashed to full flow and the engine is trying to start under too much load?
I could use the first four digits of your s/n to dig deeper into possible electrical issues. Can't get back til this evening CMT, but hopefully you'll giterdun by then.
Interesting, let us know.
