Here's what I recommended in a different forum a couple days ago. Before you pull the engine and have it torn apart to look it over may I suggest you try a couple of things first?
1. Disconnect all the fuel
lines and use compressed air to clean them all out. Take the injectors to a shop and have them tested. Unless you have the test bench it is hard to check them yourself.
2. While the injectors are out put some very light oil
in the injector holes and turn the engine over by about 20 times. After that get as much of the oil
the you've put in the holes out whatever way you can.
3. Make certain the injector pump
is getting lubricated. If there is a place to hand lubricate it then fill it.
4. Make certain the engine oil is new and clean.
5. Reinstall the injectors and fuel lines.
6. Make certain the fuel you have is perfectly clean and that all filters are new.
7. Bleed the injectors and fuel lines and attempt to start it. Bleeding all air out of the system is essential. If there is air in a fuel line, that cylinder will not fire.
8. Do not spray anything into the intake like ether or WD 40. If after 5 tries and it doesn't start then bleed the system again. All air must be out of the system at the injectors. Try another 5 times.
I'll bet it starts. When it starts make certain cooling
water is coming out with the exhaust
. If not, shut it down immediately. Check the cooling
water system and get it working properly.
After about 15 minutes of running time check the smoke at the exhaust
and see if it is white, black, brown or clean. Let us know and we'll help with whatever else you need.
There are many more better mechanics on this forum than me but that'll get you started.