No start issues please help!!!

[99red7.3]

Ok guys here's everything I have replaced on the truck all new glowplugs new GP relay new UVCH gaskets and wiring. Two new batteries new starter. Also had the injectors out and cleaned and flow tested. The truck still will not start unless it's plugged in or pull started. What's my issue? Where do I look next? Could it be the HPOP? Glow plug system is working fine am also getting an amount of white smoke out the exhaust while starting when not plugged in. truck is in my sig below

Someone please help me figure out what's wrong with this truck !!!

Thanks

Evan

[scarlson]

Have you tried to unplug your IPR sensor plug, does it have oil on top of the IPR(Behind alternator, front drivers head)? Have you unplugged your performance chip? Have you checked your cylinder compression? How many miles? Is your HPOP reservoir full? HAve you done a scan? I'm sure someone else will chime in. Have you looked at the cold start post?

[99red7.3]

What does unplugging the IPR do? How do I check if there's oil on top of the IPR? Truck had these problems long before the chip. Truck has 240,000 miles on it haven't checked compression yet and not sure on how you check the HPOP resivor ? Also what kind of scan are you speaking of? I appreciate the help

[NoRalPh]

I think scarlson meant the ICP sensor (unplugging the IPR will only ensure it won't run, but if the computer doesn't "see" the iCP sensor it sets a default value to the IPR and get you started). The ICP is also the sensor that allows oil to migrate through it when it's bad.

There is a small allen plug in the HPOP top that you can remove and "dip" into to check the level in that reservoir.

If you can get a professional "scan" (the diagnostic tool that connects to the OBD-II port) it can monitor the sensors as you're trying to start and point you in the right direction. It's like a simple code reader (that do Not work on our trucks) but more sophisticated.