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Tractor Talk Discussion Forum

1975 ford 2000 diesel fuel injectors

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Tom Holloway

02-06-2005 09:06:23




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I have a 1975 ford 2000 diesel 3 cyl. that is difficult to start. It does however eventually start. When i crank it over, alot of smoke comes from the stack and the smell is pure fuel. I suspect 1 or more of the 3 injectors is leaking. Now i suppose it could also be the pump producing to much pressure. I have no service manual but i need to diagnose this problem quickly. The oil, which i changed 1 week ago is very black so i suspect to much fuel is sitting in the cylinders and leaking into the crankcase. Can anyone give me advise about where to start a diagnosis..... Regards to all.....Tom

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RAB

02-06-2005 13:44:08




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 Re: 1975 ford 2000 diesel fuel injectors in reply to Tom Holloway, 02-06-2005 09:06:23  
Does it have a cold start/excess diesel button on the pump? Regards, RAB



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T Holloway

02-07-2005 08:52:12




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 Re: 1975 ford 2000 diesel fuel injectors in reply to RAB, 02-06-2005 13:44:08  
I did'nt know there was a button on the pump. I'll look though...TY



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Tom Holloway

02-07-2005 10:06:32




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 Re: 1975 ford 2000 diesel fuel injectors in reply to T Holloway, 02-07-2005 08:52:12  
Yes there is a button on the pump locacted at the top/rear. It is factory wired (locked) but i can cut this wire if i need to. The tractor does have a warmup thermostat that now functions, as it had a bad connection plug..... TY



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Rod F.

02-07-2005 15:08:57




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 Re: 1975 ford 2000 diesel fuel injectors in reply to Tom Holloway, 02-07-2005 10:06:32  
That wire you noticed is best left alone. RAB was refering to the excess fuel button on the Simms/Minimec inline pump. The 2000 has a CAV rotary pump rather than the Simms pump, and would not have any excess fuel device. The best advice I can give you on starting ability of an engine would be to make sure that it cranks close to 200 rpm's, keep the thermostart working, and keep clean fuel in the tank. If these things are up to par, then a Ford 3 banger will start down to 0 F without a block heater. If the engine only turns at 100 rpm's, it will never start. Make sure that cables and connections are good, etc. I know that's a little off topic, but important. More to the point, a cold start is one of the best quick tests of an engine's health. If the injectors and compression are good, your tractor will start, and that will save you a bunch of work in pulling them out and checking the compression. Some white/gray smoke would be quite normal from that engine upon first starting, and I doubt that you have much to worry about. HTH.

Rod

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Majorman

02-06-2005 09:23:05




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 Re: 1975 ford 2000 diesel fuel injectors in reply to Tom Holloway, 02-06-2005 09:06:23  
This is a fairly normal problem. This engine does take a lot of starting when cold. Have you got a thermostart fitted as this will be a great help? If you have a problem it is more than likely low compression rather than injectors or pump.

The thermostart is fitted in the front of the intake manifold near where the rubber hose fits on. It is operated by the start key. Turn it until the warning lights go out, just before the start position, hold it here for 20-30secs then move to start.

The oil will go black and this is nothing to do with fuel in the crankcase. If fuel were getting down there it would give the oil a clear look. Diesel engines have an oil that holds carbon particles in suspension and stops them gumming things up in the engine. The oil will normally go black minutes after a change. This shows it is doing its job.

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T Holloway

02-07-2005 08:49:51




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 Re: 1975 ford 2000 diesel fuel injectors in reply to Majorman, 02-06-2005 09:23:05  
The smoke is black and the starter is optimal. I've seen the "thermostat" located where you mentioned but did'nt know it's function. I have not followed proper warmup proceedure because i was unaware of this. Should this thermostat get warm to warm up the air intake?....TY



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T Holloway

02-07-2005 10:10:12




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 Re: 1975 ford 2000 diesel fuel injectors in reply to T Holloway, 02-07-2005 08:49:51  
After looking at the smoke in better light, i would now say it is greyish/white. The thermostat now works as it had a bad connector....TY



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Rod F.

02-07-2005 09:03:21




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 Re: 1975 ford 2000 diesel fuel injectors in reply to T Holloway, 02-07-2005 08:49:51  
You can think of the thermostart as a little oil stove in the intake manifold. It has a heating element that glows red, and then a mechanism opens up and drips some fuel on the element and it burns in the manifold, thus heating the intake air. I'm not sure how yours is activated, but some tractors had a push button near the key. On some models, the key was turned to the left to activate the heat function. On later models, the key was turned to (and held) in a position between "run" and "start" when the panel lights go out. No matter which setup you have, hold the thermostart on for 20 seconds or so, and then try starting. If this helps, but it still doesn't start, repeat the cycle until it starts. Sometimes in real cold weather, 30 seconds is better than 20. You'll get the hang of it. HTH.

Rod

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T Holloway

02-07-2005 10:17:42




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 Re: 1975 ford 2000 diesel fuel injectors in reply to Rod F., 02-07-2005 09:03:21  
My earlier replies state i have affirmed and tested all of the suggestions offered. I now believe that my compression is likly low because of the greyish white smoke and very hard to start symtoms. I do though have the warmup thermostat working,(bad connector replaced) and tested it with a test light. It lights up with the key between the on and start position..... TY



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J. Schwiebert

02-06-2005 10:09:10




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 Re: 1975 ford 2000 diesel fuel injectors in reply to Majorman, 02-06-2005 09:23:05  
Thermostarters are good starting aids. You did not say what color smoke you have. The grey smoke for lack of a better description is a sign you are either low on compression and or your starter is not cranking the engine fast enough. You can also remove the exhaust manifold and see if the smoke is comming from one cylinder or all three. Questions?



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T_Bone

02-06-2005 13:54:24




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 Re: 1975 ford 2000 diesel fuel injectors in reply to J. Schwiebert, 02-06-2005 10:09:10  
Hi tom,

You might want to give a supply house a call as mechanical injectors are usually cheap, about $25eh new.

If there expensive then you can "help" them along ways by unscrewing the vavle body and using Berryman B12 to clean them with. The B12 with melt the carbon build up before your eyes.

Pay close attention to disassymble as there will be a few washers and springs or check balls to deal with in the correct order of assymble.

Be VERY clean using brake cleaner as you assymble on a smooth white cotton cloth.

You mght want to preform a compression test while you have the injectors out. Anything higher than 385psi is good. Make your own compression gauge form a 0-600psi gauge and some fittings. If you replace the injectors save a injector body for the special thread in the head for compression testing.

Install the injectors and leave the fuel line loose, then crank over the engine until fuel comes out of each connection, then tighten the fuel line nut, then start.

T_Bone

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T Holloway

02-07-2005 10:21:00




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 Re: 1975 ford 2000 diesel fuel injectors in reply to T_Bone, 02-06-2005 13:54:24  
Thank you T-Bone for the information...Read my replies as i may need to check compression now.....TY



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J. Schwiebert

02-06-2005 18:24:25




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 Re: 1975 ford 2000 diesel fuel injectors in reply to T_Bone, 02-06-2005 13:54:24  
Never use cloth. Use paper towels. No lint that way.



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