Crank but no start, has fuel

young7.3 · Jun 19, 2023

My buddy went in and repaired the non serviceable plug with a new seal and used loctite. He triple checked to make sure the check valve was assembled properly. Now after putting it back together he has no start, but cranks very well forever.

-Has fuel pressure. 60+ via gauge
-has rpm movement on tach
-wont even start with icp unplugged
Here is more data while cranking.

He’s going to check the check ball again next.

Anyone got any ideas?

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young7.3 · Jun 19, 2023

young7.3 said:
My buddy went in and repaired the non serviceable plug with a new seal and used loctite. He triple checked to make sure the check valve was assembled properly. Now after putting it back together he has no start, but cranks very well forever.

-Has fuel pressure. 60+ via gauge
-has rpm movement on tach
-wont even start with icp unplugged
Here is more data while cranking.

He’s going to check the check ball again next.

Anyone got any ideas?

Sent from my iPhone using Tapatalk

Forgot the photo.

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6.0 Tech · Jun 19, 2023

Which one of those is icp? What is it while cranking? After opening the system, it typically takes 30 sec to a minute worth of cranking to get it to fire the first time.

Make sure the pump gear is tight, had that happen to me in one.

Also, make sure the ipr is plugged in, and the wires at the pigtail aren’t chafed and shorting together. Did it get a new ipr while he was in there?

Does it have enough oil in it?

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young7.3 · Jun 20, 2023

6.0 Tech said:
Which one of those is icp? What is it while cranking? After opening the system, it typically takes 30 sec to a minute worth of cranking to get it to fire the first time.

Make sure the pump gear is tight, had that happen to me in one.

Also, make sure the ipr is plugged in, and the wires at the pigtail aren’t chafed and shorting together. Did it get a new ipr while he was in there?

Does it have enough oil in it?

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Icp is the top middle which reads zero. Weird thing is with the icp sensor unplugged we got 2500 psi. Which i know is wrong because my truck only gets 600-800 psi when starting.

He has a 17 degree oil pump.

Its full of oil. Even the hpop reservoir.

Same ipr as before. And its plugged in.

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dsberman94 · Jun 20, 2023

2500 is probably default for it unplugged, can’t remember what it goes to but that’s why it’s the test if the icp is bad. It tells the computer there’s enough pressure to fire, so it does. Manual gauge in the oil rail. Or pull the icp out and see if oil shoots out while cranking. That would tell if you’ve got pressure or not. Sounds like there’s no oil pressure to actually fire fuel from the injector.

6.0 Tech · Jun 20, 2023

young7.3 said:
Icp is the top middle which reads zero. Weird thing is with the icp sensor unplugged we got 2500 psi. Which i know is wrong because my truck only gets 600-800 psi when starting.

He has a 17 degree oil pump.

Its full of oil. Even the hpop reservoir.

Same ipr as before. And its plugged in.

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Having 0 psi icp is odd. It should build basically to what base oil pressure is, if the pump is shot. I’d lean toward the gear isn’t tight, and the hpop isn’t spinning, so you’re getting 0 oil flow to the heads

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webb06 · Jun 20, 2023

Does the oil psi gauge on dash come up?

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Powerstroke Cowboy · Jun 21, 2023

Did he have the HPOP off the pickup? The lack od ICP needs to delt with first before anything else. You need atleast 500 psi to fire, but it will go a up over 2000 while cranking if it does not fire right away.

young7.3 · Jun 21, 2023

He removed the hpop to repair a leak.

I dont remember if the oil pressure gauge in the cluster moved or not during testing.

Im going to have him remove a plug on the oil rail and see if oil shoots out while cranking.

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dsberman94 · Jun 21, 2023

Just remove the icp sensor from the oil rail. I believe the plugs have o rings and you might not get it sealed again.

young7.3 · Jun 29, 2023

My friend took the check valve back apart and everything was installed as normal. He noted that when he removed the icp sensor no oil came out like it normally would.

What other reasons would the hpop not be creating oil pressure for? This is a fairly new 17 degree hpop.

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dsberman94 · Jun 29, 2023

Gear isn’t there or tight. No oil in the pan. Broken pick up tube in the pan.

dsberman94 · Jun 29, 2023

Sounds like there’s an underlying problem since he serviced a non serviceable item so why did he do that to start with?

young7.3 · Jul 1, 2023

dsberman94 said:
Sounds like there’s an underlying problem since he serviced a non serviceable item so why did he do that to start with?

It’s most definitely serviceable.

This is how to repair the "non-serviceable&quot...

This is how to repair the plug that is on the bottom of the HPOP (the plug that you have to remove the HPOP to get to). This plug is listed in the service manual as "non-serviceable"/"do not remove". After tracking down the leak on my HPOP, I found it to be the plug on the bottom that is not...

www.thedieselstop.com