Autocar

Anyone have any experience with a 400 HP Cummins dying after a long coast? This has happened three times now. After coming down a long slight grade with no throttle and coming up to a stop sign or freeway exit the engine just stops cleanly as if I shut off the key. I coast off to the side of the road and hit the ignition and it fires right up and no more problems. I don't have a clue where to look. Any ideas?

ted korpi

Sounds like the fuel shutoff or losing power to it. Turn the screw on top of it. It will not shut off with the switch then but you will see if that is the problem.

wreckerman893

Were you using the Jake when it quit?

If you mash the Jake pedal down just before you stop this can happen.

Since I was so used to pushing in a clutch I caught myself doing this unconsiously in my M915.

Scared the crap out of myself a few times before I broke myself of the habit.

__________________
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Wreckerman's rules of the road (and living in general)

Never play cards with a guy named "Ace".

Never shoot dice with a guy named "Slick".

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R Racing

My jake has a issue were it wont release from time to time ( even when I don't depress it, Think I have a electrical gremlin) . Have you tried setting it to low? Mine will do it on high and med but not low.Mine will sometimes do it at idle when I let off the throttle from a higher RPM.

73m819

[QUOTE=R Racing;1012685]My jake has a issue were it wont release from time to time ( even when I don't depress it, Think I have a electrical gremlin) . Have you tried setting it to low? Mine will do it on high and med but not low.Mine will sometimes do it at idle when I let off the throttle from a higher RPM.[/QUOTE]

Sounds like your MICO switch at the IP is sticking, also DIRT under the retarter pedel will cause the not releaseing, the switch under the pedal is nothing but a foot start button,

__________________
Ron
Gainesville, Ga.
vietnam-1/66-8/68
42 5t? autocar tractor, gone
43m20, 12t, converted to tractor, gone
52m52, tractor, gone
73m819, tractor/wrecker AKA Wrecked Wrecker
77xm977 10t 8x8, to be a xm 983 sold
What ever else that can be drug home
Use CUCVs, a small step below BOBBERS as wheel chocks
GOD help the MV world if i win the LOTTERY
LONG LIVE BIG GREEN IRON

R Racing

I would agree. but its not suppose to come on unless I push the jake pedal . So I'm thinking Jake pedal switch. I did check both with a meter and they seem to actuate fine? anyone know were to find a replacement Jake pedal switch ??

73m819

i would guess napa, any foot start switch should bolt in, looks like evan a old ford tractor start button,

__________________
Ron
Gainesville, Ga.
vietnam-1/66-8/68
42 5t? autocar tractor, gone
43m20, 12t, converted to tractor, gone
52m52, tractor, gone
73m819, tractor/wrecker AKA Wrecked Wrecker
77xm977 10t 8x8, to be a xm 983 sold
What ever else that can be drug home
Use CUCVs, a small step below BOBBERS as wheel chocks
GOD help the MV world if i win the LOTTERY
LONG LIVE BIG GREEN IRON

Autocar

I wondered about the Jake. The very first time it happened, I was backing up and turned around looking out the back window and I thought I might have hit the jake. I don't think I hit it on the coasts. I have the brake set on High. Where is the fuel shut off solenoid or the screw on top?

fasttruck

The knurled bypass screw id on top of ther fuel solenoid which is on top of the pt fuel pump on the left side of the engine where the throttle linkage ends. Normal running position is mturned out so the solenoid holds the valve open and when key is turned off allows in the close and stop engine. If turned on (clockwise) the screw holds the valve open all the time and with a 915 it will not shut off until the screw is reversed. With a 809 put in im high gear and stall the engine, 900s use the emergency shut off in the middle of the dash and reset the valve under the hood to restart engine.

Autocar

Thanks, I'll look for it