I had just replaced a ton of parts due to an oil-cooler failure and then had a rough running conditions and with help here deduced it to be the EBP sensor and tube. Replaced the sensor and all worked fine for 5 days.

Drove the truck to work and all was fine. About a 20 mile trip and the truck got up to operating temps. Parked the truck for one hour and then drove 1 mile on my work campus, parked the vehicle for 30 mins and then it would not start.

Glow plug light lit up, heard the buzz of the fuel pump/injectors and saw the oil pressure dummy gauge in the truck move up and down while cranking...

Without having the SGII programmed for FICM, ICP, and other gauges, I checked voltage and it was fine. Cranked until the batteries drained. Towed the truck to the shop thinking it was an oil pressure related issue. Recharged the batteries and the truck has been working for the past 3 days. Checked the batteries and charging system and all checked out good.

I do see low voltage at initial start up for about a minute (11.9-12.6) and then is goes to normal (13.6-13.8) and stays there until the truck is turned off. This repeats every start up.

I feel this issue may resurface and am looking to you all as the experts on what I should watch on the SGII over the next week to feel a bit more confident in the truck.

Thanks in advance!

 

Sounds like some air in the system broke lose to me.

 

I see similair voltages at startup

the alternator dont kick on till the Glow Plugs have turned off

Id be watching ICP and IPR% as well as Ficm do you need the codes

thought you had this truck going good maybe just a hickup

 

Got all the codes, thanks Benny.
Will watch and report back...

Watched ICP on the way home (575-615psi) at idle and ranged above that under way and at full throttle. Seemed good to me.

Gonna load the rest of the suggested gauges and watch them this week.

 

If it does it again pull the wire conector off the ICP and try to start that way

the PCM should use a preset value and start if its a bad ICP sensor

 

Since you just did the oil cooler you might have gotten some trash in the IPR valve. You might want to pull the valve and check the screen for trash or a hole in the screen. If the valve got hung open it would dump all the HPO to sump causing a no start. It's a fairly common problem.

 

I have watched ICP and FICM Main Power and both check out good... Main power hangs between 47.5-49 at all ranges...

Should I watch something else on the FICM in lieu of main power?

Going to watch IPR now.

No further hiccups so I am praying this was a one time deal. Truck running perfectly for 6 days now... a recent record!

 

I would STILL remove the IPR valve and check the screen. You might be surprised what kind of trash is on it.

 

As Cheezit's told me....

When replacing an oil cooler, and if dirt or junk falls into that oil valley, it can easily trash an IPR valve, I would agree with npccpartsman and check your IPR...

If there is any damage to the screen, cracks, pushed back, replace the valve.

 

Will pull the IPR valve tomorrow and giver it a look see!

Thanks for the suggestions.