Turns over won't start .

[jrtrucknut]

I've been banging my head . The things that were suggested from my last post din't help. The truck has half a tank of fuel,wait to start light comes on then goes off,full of oil tack moves when turning over and engine oil pressure gauge shows good pressure building and holding .When i hook up scanner the only fault i see is a low reading on the high pressure side.It builds up to 265 to 300 psi and drops off quickly when you stop turning it over. Could this be broken or bad injector cups bleeding off pressure or something else completely.

[StoneGuy]

This is my no start experience. One day my truck wouldn't start. It crakned over fine, had fuel, glow plugs were working, just wouldn't start. I was perplexed. With a little help from eather I got it running and immediately drove to the dealership because I had no time to deal with this. Dealer said it was injector O' rings. I didn't know that would prevent it from starting and I told them to go ahead and fix it. $800.00 later I get the truck home with no problems but, when I tried to start it the next day guess what? It cranked and cranked and cranked but didn't start. I had some experience with my BMW doing the same thing, I know, my truck and my BMW are so similar right? Well the problem with my BMW was low voltage from the batteries, they had lost their charge and the fix was replacing the batteries. Rather than us eather to get the truck going I tried getting a jump from my uncle and sure enough, she fired right up. I replaced both batteries and have had no problem since but rather than costing me just $300 for the batteries it cost me $1100 and I don't think the O'rings were bad at all. That diagnosis was on the phone when I told the dealership what was happening. They didn't even check the voltage. I hope that helps.
Regards,

Dwight

[UNDERCOVER_73]

Dealers will screw you over ^^^ goes to show.

Check your IPR by putting 12v and a ground to the wires. if you hear a click. it works.

[Codum]

Originally Posted by jrtrucknut

I've been banging my head . The things that were suggested from my last post din't help. The truck has half a tank of fuel,wait to start light comes on then goes off,full of oil tack moves when turning over and engine oil pressure gauge shows good pressure building and holding .When i hook up scanner the only fault i see is a low reading on the high pressure side.It builds up to 265 to 300 psi and drops off quickly when you stop turning it over. Could this be broken or bad injector cups bleeding off pressure or something else completely.

I have read you need 500 psi on the high pressure side to start, less than that and the injectors won't fire. You can verify this by looking for smoke out of the exhaust pipe while trying to start. No smoke= no fuel, injectors not firing due to low oil pressure from the hpop. Have you worked on the hpop lately, you could pull the front cover plate off and check that the bolt is torqued properly. You may need a new hpop? Good luck!

[jesilvas]

ICP cranking is too low.
Either bad IPR or bad ICP.

[Codum]

Originally Posted by jesilvas

ICP cranking is too low.
Either bad IPR or bad ICP.

How do you know it's not the HPOP? just tring to learn more. I guess it could any one of the above.

[jesilvas]

Yea could be that too.

[Turbostang500]

need to install a mechanical gauge in the hpop system and verify the pressures. If they match the scan tool, it is hpop time. If they are higher and in the proper range, icp time.

[jrtrucknut]

Learning as i go .The hpop is off a running truck.Were fotunate to have three power strokes in our family .the pumps a leftover from my suns mod. on his truck .i tried all the control censors on my wives truck.One at a time ,to verify they were still good.Good bat cables deep cycle gel batteries . Theres two things that i have found out. One there used to be a alarm and remote start in this truck.it was removed after the accident .Two the person that sold it to me ,was useing either to try and start it until he burn the hair off his arms ,thats the only thing funny about this so far. Thanks for the feed back

[Codum]

Are you getting smoke out of the exhaust pipe while trying to start? If you are then you can rule out th hpop.