Ya can get um for like 450 i get numbers out send um to ya

 

thankyou very much. your help is very much appreciated.

 

I am shooting in air here cause never hear of truck starting after warm up but going guess you have glow plug problem the 6.5 needs glow plug even after they get how also or maybe sucking air some where on return line or OPS , LP not working right

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Steve32 here some more info for read

Reference Material: Hard Starting
So, you say you have hard starting?

Well, this is a common problem, for many of the years of diesels that GM had. However, the problems are altogether different. For pinning down exactly why you may be having a hard-start issue, you’ll first have to start with what type of engine and fuel system you are working with.

Now, before we get into the complexities of the fuel system, let’s eliminate something simple first. If you have a hard start condition when cold, it may be a simple glow plug issue. Check your glow plug system first before proceeding to make sure it is operational. Glow plug problems are most noticeable in cold weather conditions. You will usually get a lot of white smoke on startup. This usually indicates insufficient heat for ignition.

Now, if your glow plugs have passed the test, forge ahead into the pool of diesel.

There are two main types of “systems” we’ll call them. First is mechanical injection, and the other is electronic injection.

Mechanical injection is found in years up to 93
Electronic injection is found in years after 94

Maybe you are a little confused, and your application maybe a step van, or something other than the norm. How do you identify your type of fuel system? Check the model of the injection pump. You’ll see a number system such as this:

DB2-4911
DS4-5521

Now, there are various numbers that you will see, but basically you are looking at the first three letters. DB2 is mechanical, and DS4 is electronic. You can also be tipped off by the “PMD.” The PMD is the little black box that usually resides on the side of the injection pump. (Fondly referred to as the IP) So, a PMD will mean electronic, unless of course someone stuck one in for decoration. That’s not common though.. . ..

DB2’s are still out there, but they are getting fewer and fewer. DB2’s commonly have an issue with a no hot start issue. This usually occurs when you have a worn head and rotor within the injection pump. If you have a no hot start, do this simple test. Take about a pint of room temperature/warm water and slowly pour it over the injection pump. This will cool it down and you may be able to then start. Now, notice, this is not a GM “approved” test procedure, but it will show if your IP is to blame or not. Please also note, do not use COLD water, but a moderate amount of room temperature water. Too much may cause thermal shock and something further down the line to crack.

Can I fix my head and rotor? For the most part, no, you’re not going to be able to do this on your own. A fuel shop that works on these pumps will be about the only way you can go. Replacement of the injection pump may be another way of fixing this issue.

Now, the DS4 pumps have different no-starting issues. They rarely have the same hot start problem that a DB2 has, but it has happened. Some of the many issues that arise with them are caused with the PMD.

How do I troubleshoot and pin down if it’s a PMD or not? There is a whole thread devoted to the PMD and you can go there for more information on that. A PMD usually has an intermittent failure, as opposed to what you may find with a mechanical injection pump, that just won’t plain start. Not so say that a PMD would just outright die on you, but this seems to be a lesser found case.

Fuel supply issues. Make sure that you have a working lift pump and OPS. These two things will frustrate getting the engine started because the injection pump has more work to do.

Are there any other problems with the DS4 pump? Well, the nice thing is, the computer will usually tell on you and pop a code. Depending upon the code, you may get extended cranking time to get your engine started. If your Service Engine light (SES) is on, have your codes checked. Up to 95 is OBD-I style, and you can check it yourself with a paperclip. After that is ODB-II style, and you’ll need a code reader.

Cranking speed - A diesel must have good cranking speed for it to start. A slow turning engine will not get the heat built up, and the injection pump turning fast enough for it’s pumping needs.
My engine is not cranking fast enough. Where do I start? Well, several different contributing factors will slow down the speed. They are:

Battery cables - a known weak spot in the charging system. Poor contact, corroded cables and the side post setup are all causes for electrical woes.
Batteries - diesel engines are very hard on batteries. You have to rob about a hundred or so amps just for the glow plugs - then you really sting them with starter trying to turn a high compression engine. You may get 5 years out of your gas engine batteries, but don’t be surprised if you are changing your diesel batteries more often. If your batteries are in doubt, you can have them removed and tested.
Starter itself - if your starter is getting weak, it may not be turning up to full speed. Check all the above first, before deciding upon repairing or a new starter. Many have posted improved cranking speed from improved connections alone.

Maybe you’ve got a situation where you have a no-start condition. One of the things you can do, is check to see if you have fuel coming to the injectors themselves. This is the last part of the fuel system itself. Simply loosen the nut on the back of the injector and see if fuel squirts out while cranking. If you have no fuel there, you’ll have to back track and figure out why. Now, just because fuel because fuel maybe there, does not mean that there is enough pressure to “pop” the injector open, but fuel delivery to that point will help better understand what’s happening where.

Air leaks - in the fuel system too may not be helping matters any. Check around the fuel filter bowl and see if you have an oily residue under it, in the engine valley. If your filter is leaking, it may pass some air through the system. Filter bowls can be rebuilt inexpensively.

Fuel cap - this may not be the outright cause of a hard start issue, but it may not be helping either - especially if you have any type of air leakage in the fuel system. When you remove your fuel cap, you may hear a slight "hiss." But if you are hearing a long WWOOOSSHHH - time for a new cap. Make sure that it is a DIESEL cap. Gas caps will NOT work. Diesel caps are vented to prevent vacuum from building, although a very slight one will build.

 

thankyou crazy, that info helps alot