b2400 starts, then stalls immediately

[tomf]

My B2400 starts and then immediately stalls after running one or two seconds. When it stops it sounds like a normal shutdown. When the throttle is in different positions the engine revs up appropriate to the throttle position. Started and ran perfectly about a week ago. I cleaned the fuel filter and air filter. Added more diesel. Anyone have any ideas. Thanks Tom

 

[tomf]

My B2400 starts and then immediately stalls after running one or two seconds. When it stops it sounds like a normal shutdown. When the throttle is in different positions the engine revs up appropriate to the throttle position. Started and ran perfectly about a week ago. I cleaned the fuel filter and air filter. Added more diesel. Anyone have any ideas. Thanks Tom

 

[BCNU]

You may have have alowed air in the system when you cleaned out your fuel filter. Try bleeding your fuel system. Good luck!!

 

[BCNU]

You may have have alowed air in the system when you cleaned out your fuel filter. Try bleeding your fuel system. Good luck!!

 

[B2400]

There is a selenoid on the back of the injection pump which controls the fuel for start up and shut down. I would check it first to see if it is staying energized( held open) after the ignition key is turned on. If for some reason it only opens for a moment then deenergizes it will do exactly what your stating. Check for constant voltage first before you remove it from back of pump!

 

[B2400]

There is a selenoid on the back of the injection pump which controls the fuel for start up and shut down. I would check it first to see if it is staying energized( held open) after the ignition key is turned on. If for some reason it only opens for a moment then deenergizes it will do exactly what your stating. Check for constant voltage first before you remove it from back of pump!

 

[tomf]

Thanks for your reply. The fuse to the fuel cutoff solenoid is burning out after every attempt to start it. It burns out when the key is switched to the ON position. Probably the other positions as well.

I've checked the lead terminal voltage. It reads 12 volts, exactly where it should read.

I've also tested the Fuel Cutoff Solenoid resistance. It measured high, 2.5 ohms vs the expected 1.5 ohms. Would this be enough to blow a 5 amp fuse?

I also attempted to test the solenoid by running current straight from the battery. I did not hear anything that would indicate the plunger being retracted. I'm not sure I ran this test correctly.

I also did a cursory check of the wiring. No obvious breaks.

So my question is: do I replace the fuel cutoff solenoid (which appears to be easy) or do I spend more effort checking the wiring (which is very difficult to access)?

Thanks Tom

 

[ewoz]

<<I've also tested the Fuel Cutoff Solenoid resistance. It measured high, 2.5 ohms vs the expected 1.5 ohms. Would this be enough to blow a 5 amp fuse? >>

If your battery voltage was 12.5 Volts and your solenoid resistane was 2.5 Ohms you would draw 5 Amps. If the solenoid resistane is supposed to be 1.5 Ohms it would draw 8 amps when the battery is 12 Volts. I am thinking the solenoid is not serviced with the 5 Amp fuse that keeps blowing. I would try to determine what the 5 Amp fuse powers.

 

[tomf]

I have the wiring diagram. It clearly shows the 5 amp fuse wired to the fuel cut off solenoid. The fuse is labeled Key Stop. Thanks Tom

 

[wushaw]

I would disconnect the fuel solonoid then put a fuse back in the spot that keeps blowing to see if it still blows.
If it does then check your ign switch and wiring.
Also ohm out the non-power side of that fuse to check the resistance.