250 fuel shut off

[Bandit02]

So....

I did that dual fuel line mod ages ago and for whatever reason today I used the emergency shut off after a drive and it doesn't work. Took the fitting off the IP thinking it was broken inside and not closing but it appears normal and it opens/closes just fine. Tried blowing through it with it closed and nothing is getting through.

Put it back together and even with it closed the engine just hums away no problem. Anyone have any idea with a closed fuel inlet the engine can keep running? I thought when the pressure was killed the engine shut off?

The dual mod I did was just a tee fitting AFTER the shut off and the appropriate fuel line running to the #1/#3 heads, the return side I never touched.

 

[simp5782]

So....

I did that dual fuel line mod ages ago and for whatever reason today I used the emergency shut off after a drive and it doesn't work. Took the fitting off the IP thinking it was broken inside and not closing but it appears normal and it opens/closes just fine. Tried blowing through it with it closed and nothing is getting through.

Put it back together and even with it closed the engine just hums away no problem. Anyone have any idea with a closed fuel inlet the engine can keep running? I thought when the pressure was killed the engine shut off?

The dual mod I did was just a tee fitting AFTER the shut off and the appropriate fuel line running to the #1/#3 heads, the return side I never touched.

It may operated properly with no pressure on it thru that valve but what about with pressure thru it maybe its forcing it open or over the stop for it and opening itself up. I have a parker type tab shut off valve as soon as it closes it dies.


Blow air thru that valve with it in your hand and see if it flutters with you holding the shut off valve arm in the open position


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[simp5782]

Cummins 208087 for that valve

Or i use these. You cab still drill the knob for cable pull

https://www.hopedirect.com/product/...yYhWC7Pn4MjD5xlWlBv1Lgj1pY4qcvDBbMaAjf78P8HAQ

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