Ok, so I went ahead and ordered 2 new injectors (thanks Gary!). Just trying to test them out and not figuring this out yet.....

I've hooked one injector up to either high pressure line and not getting a squirt from the end of the injector.

I've bled the lines. I poured a little diesel into the 2-3inch tube on the injector. I've cranked the heck out of the engine... nothing, no creak, no squirt. Fuel comes out of the high pressure lines w/o the injector hooked up. I've bled the fuel out to the tip of the high-pressure line and then attaching the injector tightly. Also, I am not putting the injector into the engine head yet. I'm wanting to see/hear the injector work. Am I missing something here? Should I be looking at the fuel pump? Is there a way to measure their pressure?

If the pintle isn't seating then there's probably something in the way!

Don't force it, you may well bugger the seat, strip it down and clean it out, re assemble and do a 'paraffin' test, this one......

Just to be clear, the pintle seems to fit nicely into the body of the nozzle. When fitting the nozzle w/pintle onto the injector body, the two pins line up and the pintle flat end fits into the center hole of the injector body but there is 3-4mm of daylight between the nozzle and the injector body where the flat part of the pintle fits into the end of the spring. Pressing the nozzle down hard makes the spring go nowhere. I assume you should be able to depress the nozzle flush on the injector body?

Thanks for all the feedback. I’m gonna start w buying 2 new injectors and hope the clean out of the two pumps were sufficient. For grins and giggles I’ll tear down the old injectors and see if I can make a spare.

How strong is the spring inside the injector? Is this something you could depress with your hand or is it stronger than that? Asking cause on one of the injectors, the pintle and nozzle doesn’t fit flush even pressing in hard by hand. I assume the nut would tighten it down flush with enough force if necessary

I picked up a Lovoson 12/2 that owner thought had a clogged injector or pump. I've given the engine a decent go thru. The previous owner had been running veggie oil thru it and it stopped working after sitting one winter. Compression is good, oil pump good, changed oil, crankcase is clean.

Both fuel pump racks were locked up tight. One of the fuel pumps was seriously gunked up with a black tar mixture. The fuel line from the tank to filter was solidly blocked with the same black gooey tar. Past filter, and in pumps it looked more like regular diesel.... other than the pumps being covered in tar.

I pulled the pumps apart, cleaned them real good and now have good action in the rack. Fuel squirts out of the high pressure lines.

I have one injector now squirting out (not in engine) but no creak. The other injector had a nozzle that is nearly black and it doesn't squirt. I hooked the working injector up to the high pressure line the bad injector was on and don't get it to squirt anymore. Bad injector also didn't work on what was the working high-pressure line. Once I switched them back, the good injector works on the good high pressure line.

Both high pressure lines squirt fuel out, but wondering if I have both a bad pump and a bad injector? The pump on the bad side does seem to behave similar but it did have a spring and brass/copper washer in it that looked like it had been tweaked pretty good at some point. I had hammered the copper washer back flat before putting it together.

Here is a video of the bad line squirting fuel, not attached to injector.

http://youtu.be/O-qetCVAVx4

Maybe need a new injector and pump?