also fuel bowl is full mech checked pressure was i think about 50-55 he said it was normal oil reads full on dipstick

 

If you're seeing oil spit from the injectors, then stop while you're cranking, I'd put the batteries on a charger. Your voltage may just be dropping too low for the IDM to fire the injectors. You might also try unplugging the ICP just to see if that helps.

 

Thats good advice! Put the charger on it and be ready to crank for a while but don't crank too long that you burn up the starter. Once you get it to start go drive it like you stole if for about 30 miles. Once you do that it will have purged all the air out of the system and you should be good to go.

 

it started & ran for 2-3 minutes lot of white smoke & fuel knock it shut off and has only tried to start a few times it will try when i see oil discharge from injectors fuel bowl is full i think fuel pressure is 50-55 mech checked said it was good oil level is full found wiring harness to ipr/fuel bowl partially melted i rewired it then changed pcm & idm still no start

 

i charged batteries low amps for 24 hrs to full charge last night still no start

 

You did the injector swap yourself right? How did you evacuate the oil out of the cylinder?

Have you tried unplugging the new ICP to see if it makes a difference? Have you checked the HPOP reservoir oil level lately? Sometime extended cranking can make it drain down.

When you see the oil discharge from the injectors, do you have to crank for a while before they start spitting, or do they start right away? Do they start and then stop the discharge? Did you pull a plug in the oil rail (or fuel rail) prior to pulling the old injectors? Any chance one of those plugs is loose?

 

i pulled the 2 plugs under valve cover in each head for oil drain & 1 plug on back of head for fuel drain i double checked all plugs i also changed glow plugs i left them out & spun engine over to blow out cylinders i did try unpluging icp ikeep topping off reservior when the injectors started discharging without a lot of cranking i stopped cranking to set valve covers on & they havent fired anymore

 

Let's go back to the partially melted wires. IPR and fuel bowl are 2 different things. Can you be more specific as to which wires were melted? Does your WTS (wait to start" light come on? Have you checked for blown fuses with a test light?

 

On the OBS the fuel filter housing and IPR wiring are on one pigtail.

 

the wire that had bare spots was one that went to ipr all 5 wires insulation was stiff and somewhat melted but no wires touching each other but maybe ipr wires grounded out at one time dont know for sure

 

the wts light does come on the fuses i believe you are talking about are the large fuses under hood they are all good the small ones & the relays i dont know for sure

 

Thanks, been too long since I've peeked under the hood of an OBS, so I'll likely say plenty of stupid things. Just bear with me

If you've had wiring issues going to the IPR, I'd think you really need to get it on a scanner where you can monitor IPR duty % while cranking. Until then, you might try having someone else crank while you wiggle the IPR /fuel heater harness.

 

is there some way to check ipr with ohm meter ? what type signal goes to the ipr is it low voltage maybe? i could check to see if it is getting any signal

 

i'm going back to the part where you said you know it has high pressure oil because you said you removed a galley plug and it had some pressure...... that is your problem. number one you NEVER remove those plugs especially while crnaking or right after it shuts down. if it functions properly the plug would have blown clean out of your hand and the oil would have cut you like a hot knife in butter. while cranking the pressure will reach a minumum of 500 psi and a running engine can see in excess of 3000 psi. you do not want to mess with the high pressure oil system on these trucks without knowing exactly what you are doing.

that said, you need a scan tool to get live data. i'm guessing that based on your reply about the oil pressure at the head then you still have a high pressure oil issues, whever it's an ipr wiring issues or a crapped out low pressure pump, the info you have given points to high pressure oil.

a quick thing to check again is the level in the high pressure pump resevoir. is it within 1/4 inch of the top?

 

i loused the plugs & filled the reservoir and then turned engine over to clear air out of system until oil started to spray out i checked oil level next and topped off i diden't pull them after running or excessive cranking