Diesel 101 Question

[ovrszd]

So, if it's a solenoid controlled high pressure pump, sounds like it doesn't have power to the solenoid when the key is in the "on" position?? Has power to the solenoid when in the "start" position??

Should be fairly easy to check for power at the solenoid in the "on" position. Turn on key, power check solenoid terminal.

Normally electronic solenoids used in this application would have power to allow fuel thru. Shut off power and they shut off fuel supply.

 

[bfrenock]

No good on the ignition lube and I found that I had left the plug to the controller not fully seated which was why it even got close to starting . Alarm not making it trough the controller but injector pump not getting through either maybe. Anyway, I think you have answered my basic questions:. Injector pump has a solenoid that is electronically activated to allow fuel into the cylinders.

Thank you for your time. Have a great day!

Bob

 

[ovrszd]

So, it's working now?

 

[bfrenock]

Unfortunately, no. I have another post near same time as this discussing my original problem where I have a constant alarm and no glow plug light when switched on. This thread was really just to get some basic info on how things SHOULD be working .

Bob

 

[ovrszd]

Unfortunately, no. I have another post near same time as this discussing my original problem where I have a constant alarm and no glow plug light when switched on. This thread was really just to get some basic info on how things SHOULD be working .

Bob

Okay. I'll let your other thread work on the solution to that.

 

[the old grind]

Have we ruled out adding a jumper with fuse, diode, & switch to keep 'er running in the interim?

I thought well of the suggestion, .. the fuse obvious, and the diode to prevent back-feeding to source.

btw, do you have the 4 cyl Mitsubishi engine?

 

[bfrenock]

Mitsubishi I don't know; It is a 4 cyl, model S4L and 28HP according to manual, if that tells you enough. And to where were you suggesting the jumper, just the glow plugs to see if it starts which might rule out problems with the fuel solenoid?

Bob

 

[the old grind]

Bob, suppose everything seems/shows 'hot' n the crank position. (Yes, a Mitsu if 4 cyl, & totally NOT a prob) Suppose 'controllers' can make 'cheating' or 'bypassing' OEM complexity seem daunting (we CAN w/o 'common rail', but should NOT 'be skeered' ). Many diesels WILL run with no functional wiring whatsoever.

WIMI, you can jumper many tractors 'awake' that have as much as a 'fried main harness'. btw, Trust Aaron and Richard(!) to correct me if I don't get this right.
(They being "Council of Learn-ed Elders" emeriti for ages)

Guys will poke a screwdriver across a few terminals to get an engine to turn over. Perhaps 'jumpering' 12v to the injector pump solenoid could keep you running until finding if ignition switch or something else ('controller? lol) is causing your problem. jon

 

[ovrszd]

Yep, after finding no power to the solenoid in the "on" position I would run a hot wire to it and start the engine. If that workef then I'd search for the problem. If it became too evasive I would install a toggle switch.

 

[bfrenock]

I did not mean this thread to be tied to my troubleshooting, but I managed to do that anyway ... sorry. But, that being the case I want to post the same result I posted in the other thread. I do get that a diesel can be cranked without much of any wiring/connections. I think I'm going to make up a couple jumpers for the future, just in case .

Here's what I posted this morning:

I don't hardly believe it. 26 degrees this morning so headed down to add some heat to my tea seedlings and turned the tractor key on the way back (as I've been doing off and on in passing since it died). No alarm! Lifted the plastic thrown over the instruments and the glow plug light is on. Went off a few seconds later so tried to start and it fired right up!

I'm guessing you all are right, just moisture ... somewhere. I did flood the ignition switch with WD40 yesterday along with some of the connectors, mainly the controller plug, the seat sensor and one other jumper next to the seat (maybe for mid point PTO if that were installed?).

I have an aquaponics system that I've been running for about six years. I have a number of sensors in there hooked up with LAN cables. After the first year, they all started having problems from the moisture. I bought a tube of food grade grease and packed all of the LAN connections. I haven't had problems since. I'm thinking that might be a great idea for all of my tractor connectors as well. The grease is thick enough not to come out in hot weather, and will keep the connectors dry during wash downs. Since I typically leave my key in the ignition all the time, I suppose it should work for that as well.

In any case, if I don't post back, the tractor is still running and without further info or failures it must just be moisture.

Thanks everyone for your time, suggestions and patience. Have a great day!

Bob