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Re: Hard starting 466

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Author  [Modern View]

12-21-2013 18:54:17

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The TD20C is not closed center hydraulic,so electric destroke is not a consideration,the injection pump is a PES6-110 inline.I did not mention,but the timing is right on the mark according to the service manual.We put an electronic tach on it, which does not register cranking rpm,but with all the battery power it has, it's cranking speed sound as fast as anything we run in our business.It does rev up considerably until the governor releases the start latch.Once it has run for a while,it will always start well the rest of the day.Thank you all for you responces but I still need information.Where it is often parked, a block heater is not an option.

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12-23-2013 09:25:02

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 Re: Hard starting 466 in reply to cushman, 12-21-2013 18:54:17  
So the first question is always:

Is it smoking white when your cranking and it will not start?

If your not getting fuel it will not smoke white.

If your getting fuel and she is smoking white and not banging it is either a timing problem or a compression problem.

Heat and pressure. Compression ignition. All ether does is change the timing of the bang.

That is why in knocks so bad when you use too much.

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12-23-2013 10:17:06

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 Re: Hard starting 466 in reply to DanTheJDMan, 12-23-2013 09:25:02  
Quoting Removed, click Modern View to see

The ether igniting and burning long before the piston is a TDC is the problem. Peak combustion chamber pressure is supposed to occur ATD.

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Tx Jim

12-22-2013 04:01:17

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 Re: Hard starting 466 in reply to cushman, 12-21-2013 18:54:17  

I wonder if fuel is draining back to tank from inj pump? There has been check valves at fuel filter that have failed that let fuel drain back.

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Kent Petersen

12-22-2013 05:57:32

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 Re: Hard starting 466 in reply to Tx Jim, 12-22-2013 04:01:17  
you can by that check valve for about $4.00 and install in the fitting on the filters it will make a big diff if the old one is lecking

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12-22-2013 14:44:09

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 Re: Hard starting 466 in reply to Kent Petersen, 12-22-2013 05:57:32  
It is easy to check if its draining back. just pump the tansfer pump on the side of the pump and listen for the fuel going over the return valve. When the pump is full of fuel it will make a sweaking sound as it goes by the little ball in the relief valve.

Hey that is an IDEA. if that is not holding back enough pressure it will start hard and not have enough horse power. Some of those have shims inside, and need to be set at the injection pump place. Could have something stuck in it. Not good because if it does it came from the pump.

Its good to hear the magnet is strong enough to hold the fuel rail. If they get weak it will not start well. It is sort of like a choke. Full fuel until it gets running.

You can always try top timing. It does not take much. The width of a line is sometimes enough. I think it is sooner that will make it start better. you will have to look at which direction the pump turns. This is making my head hurt. I usually just ask the injection pump place.

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12-21-2013 19:54:43

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 Re: Hard starting 466 in reply to cushman, 12-21-2013 18:54:17  
My bet would be to try a voltage check while cranking. Then a Delco 44MT starter. It's your call.

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