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Was just busy over the weekend and didn't go on line at all ;) Got the PM and will take care of him.

Correct, send over a private message and I will respond. If you have issues just let us know here.

You might be able to get some parts from Ambac ( parts that are common to the M50 ) if they will still sell to you, and I have spare delivery valve springs etc. if you need one, but if you have a pitted or damaged plunger you will need to source another pump. I have also made some delivery valve...

Once you get the starter issue corrected, we can get back to it. If the IP is pumping fuel but not enough pressure, the spring may be causing an issue, not keeping the delivery valve closed long enough. Other than that the only other pressure issue I have ever seen with those pumps is pitting on...

Unfortunately the PSU pump shown on that web site ( for $780 ) appears to be an exchange not really a rebuild. I think you send them the PSU and you'll get an Ambac M50 for $780! It's cheaper to just buy yourself an M50 outright, when they are available. The #1 failure point of the PSU is a...

Before you do anything else to the pump, make sure your batteries are in good shape, it sounds like they may be wearing down as you are cranking. Next, are you using the glow plugs? If so how long? You might need them for 30 seconds min. If that doesn't help we may need to verify the glow plugs...

Also, while you're in there, double check that there aren't any remaining little pieces of the spacer stuck to the #4 holder or down in the body where the tapered edge of the holder seals. Any little chunks stuck in there will prevent the pump from building pressure. It would look like a very...

Ok, the reason you're having difficulty is that your delivery valve spacer is deteriorated an / or missing ( #5 in the image ) It's a paper thin plastic ring that goes around the delivery valve holder to keep it in place while you reassemble it. They tend to fall apart over time. You could buy a...

Sounds like your IP is most likely OK. I would reattach the lines at the pump and just crack them open a 1/2 turn at the injectors and verify that you get a very small spurt of high pressure fuel up at the injectors. NOTE: is will be just a small amount of fuel every other revolution of the...

You know me all too well Guy! He is correct: 1) Do you have fuel flow to the inlet of the IP? ( there is a check valve near the oil pressure gage that occasionally gets stuck ) 2) If you have confirmed fuel flow to the IP is good, crack open one or both injector lines and see if you are getting...

In addition to the above, check the starter itself. I have seen several " old style " starters where the linkage from the solenoid on the starter to the drive gear has gotten frozen. This causes the solenoid to be stuck in the engaged position. You can quickly verify this by seeing if the...