LB7: Help! 03 lb7 oil pressure issue

[bobo464]

I need help figuring out this issue my 03 lb7 while I was driving down the interstate decided to lose all oil pressure and drop to maybe only 6 or 7 psi. I had a edge juice box on the truck at this this time so it sent the truck into fail safe mode and cut all the power so I pulled over and shut the truck off and had it towed to my house I've tried starting the truck and it will hold pressure till warms up then it just slowly drops, I pulled the edge box off and put it the truck back to stock and it didn't change anything so I know it's not the box what could it be?

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[TheBac]

Have you hooked up a mechanical gauge to the truck to verify the pressure drop?

 

[superswamper003]

Step 1. Check to make sure there is oil in the engine via dip stick.

 

[bobo464]

I did the oil is good and that's how I know it was down to 6 psi was the Manuel gage

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[Burn Down]

What year is the truck?

What teabagger said I'm still asleep apparently lol

 

[TeaBagger2006]

Make sure there is no diesel in your oil. The diesel will thin it out and you will lose psi. It is an lb7 so it it is a very real possibility.

 

[TheBac]

Good point, Joe.

 

[malibu795]

Make sure there is no diesel in your oil. The diesel will thin it out and you will lose psi. It is an lb7 so it it is a very real possibility.

Do the white rag see of there is a halo around the oil.. Halo will be fuel..

Another
Drain it... More then 10qt come out most likely fuel in oil..

Had it happen on my 02 lb7 turned 10qts into 6 gallons on a road trip..

 

[bobo464]

What year is the truck?

What teabagger said I'm still asleep apparently lol

03

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[bobo464]

I'll definitely check and see if there is fuel in the oil , but what would cause it ?

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[pgr11]

I'll definitely check and see if there is fuel in the oil , but what would cause it ?

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Injectors.

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[bobo464]

Well I've been on nights so I'm gonna go check it here in just a little bit and I'll let you guys know thanks for all three help so far

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[bobo464]

So I finally got to check it there isn't any fuel In oil

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[duramax on fire]

What kind of oil filters do you run. We have had a cheap filter come apart on a big block Chevy.

 

[bobo464]

Ac Delco

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[Awenta]

Have you drained the oil? I definitely would have

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[duramax on fire]

Have you drained the oil? I definitely would have

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Yep at least to see if anything bad comes out. Also check out that oil filter. Cut it open

 

[bobo464]

Okay I'll give that a try to I'm on nights so it's hard to work on it between sleeping and working 12 hour shifts but I'll definitely give that a try

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[Rmart30]

What was the outcome on this?