Hard starting Diesel

59-641-D · Jan 18, 2022

Hi,

I had the fuel injector pump rebuilt about 3 years ago. I'm having an issue getting it started if it sits for a week, everything is tight, no air in the filter, but its acting like its air bound

jimtrs · Jan 18, 2022

(quoted from post at 17:02:29 01/18/22) Hi,

I had the fuel injector pump rebuilt about 3 years ago. I'm having an issue getting it started if it sits for a week, everything is tight, no air in the filter, but its acting like its air bound

ounds like a leak. I'd clean everywhere north of the pump, let it sit then look for a leak. Leaks can turn into sucking air when cranking / starting

Scott 730 · Jan 18, 2022

What are you working on????? Truck, car, tractor, combine, irrigation motor................... More details will surely help with getting pertinent answers.

used red MN · Jan 18, 2022

Kind of a general question but knowing what machine you are asking about may help you get the best replies. Fuel supply line or hose leaking the tiniest bit of air in will cause your issue. Even though the filter appears to have no air in it. Slightly pressurize the fuel tank every so carefully with an air blower and a rag around it in the fill neck, then check for leaks. Some systems have check valves that can go bad. You do not say if it has a separate mechanical supply pump, those can also cause this problem.

37 chief · Jan 18, 2022

I had about the same problem with my JD diesel. Very hard starting. My problem was the lift pump not suppling sufficient fuel to the main pump. It did pump, but was weak. A new lift fixed my hard starting when cold. stan

showcrop · Jan 18, 2022

(quoted from post at 14:12:33 01/18/22) What are you working on????? Truck, car, tractor, combine, irrigation motor................... More details will surely help with getting pertinent answers.

It may be a 1959 Ford 641D

4play · Jan 18, 2022

I assume the hard start just means a long cranking time? Does it sound like 1-2 cyls are firing but others not? Does it run good after it starts or does it run rough for several seconds/minutes ? Does it smoke during cranking or after startup? What color is the smoke, whitish/grey or black? Does it start fine after sitting a couple hours or overnight, any smoke then?

SVcummins · Jan 18, 2022

When it doesnt want to start have you tried bleeding it ?

the tractor vet · Jan 19, 2022

Well at this time of year depending on where you live fuel jelling is one thing , a getting tired engine is another thing , batterry's that are really not up to snuff , a starter not spinning fast enough due to drag injectors not breaking and proper spray pattern , engine type and MFG. is it gravity feed or lift pump fed . Really need more info Do you plug it in a couple hours before want to go play?? MFG of tractor model of said tractor .

59-641-D · Jan 19, 2022

Im sorry I left a few details out

Its a Ford 59 641-D Tractor
Gavity fed
Injectors never rebuilt
within the last year this started happening

Destroked 450 · Jan 19, 2022

I know you said the injection pump was rebuilt 3years ago, but are you gaining any oil in the pan that would indicate the umbrella seals are leaking, is it weeping fuel on the outside anywhere

Super H Mike · Jan 19, 2022

Cranking speed is important too, you could try hooking up a jump box or another vehicle and see if the extra boost makes it start .

showcrop · Jan 19, 2022

What does an "air bound" pump act like?

Hard starting Diesel

59-641-D

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jimtrs

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Scott 730

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used red MN

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37 chief

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showcrop

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4play

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SVcummins

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the tractor vet

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59-641-D

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Destroked 450

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Super H Mike

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showcrop

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