7.3 skip?

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Feb 4, 2016 | 10:36 PM

#16

oldbird1965

Fleet Owner

Joined: Aug 2004

Posts: 20,419

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From: AZ

Second vote for IPR O rings.

Feb 5, 2016 | 07:34 AM

#17

Jarrett Campbell

Cargo Master

Joined: Jul 2015

Posts: 3,076

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From: Aransas Pass, Tx

I'll actually be in your neck of the woods next week. Going to be spending two weeks in Augusta GA for a job.

Feb 5, 2016 | 11:03 AM

#18

Bird-Dog 250

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From: Otto, NC

Quote:

Originally Posted by ReBilld

Check the engine oil level. Make sure it is full. If that is good, it may be a bad ICP sensor, or IPR o-rings.

In English what are you talking about?
Just did an oil change oil is good. Do these engines have a shut down switch if the oil gets low? I keep getting asked how the oil level is

Feb 5, 2016 | 11:24 AM

#19

farmert

Lead Driver

Joined: Mar 2006

Posts: 5,111

Likes: 1,546

From: western SD

These engines use oil to fire the injectors. If the oil level gets to low, the injectors will not fire.
ICP= injector control pressure
IPR= Injector pressure regulator.

Feb 5, 2016 | 11:30 AM

#20

Jarrett Campbell

Cargo Master

Joined: Jul 2015

Posts: 3,076

Likes: 21

From: Aransas Pass, Tx

This might help you out... I definitely learned a lot

HEUI - How High-Pressure Oil Injection Systems Work - Diesel Power Magazine

Feb 5, 2016 | 11:31 AM

#21

lee00

Fleet Mechanic

Joined: Nov 2006

Posts: 1,952

Likes: 1

From: Knoxville, TN

Quote:

Originally Posted by Bird-Dog 250

Just did an oil change oil is good. Do these engines have a shut down switch if the oil gets low? I keep getting asked how the oil level is

High pressure oil is partially responsible for firing our fuel injectors....low or dirty oil can cause injectors to stop firing...

Feb 5, 2016 | 02:23 PM

#22

Bird-Dog 250

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Elder User

Joined: Sep 2015

Posts: 562

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From: Otto, NC

Quote:

Originally Posted by lee00

High pressure oil is partially responsible for firing our fuel injectors....low or dirty oil can cause injectors to stop firing...

This was happening when I bought the truck. The guy had just done an oil change . I did it just befor we left on our trip to MA. The truck has done 2500 miles since the oil change 2000 miles on the highway and did't use a drop

I'm learning some interesting stuff about the 7.3 engine. Keep it coming. Thanks!!!

Feb 5, 2016 | 02:50 PM

#23

Bird-Dog 250

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Joined: Sep 2015

Posts: 562

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From: Otto, NC

Quote:

Originally Posted by Jarrett Campbell

This might help you out... I definitely learned a lot

HEUI - How High-Pressure Oil Injection Systems Work - Diesel Power Magazine

Thanks for that link! I got alot out of it for sure. Don't know if I could pass a test yet but I do have a way better understanding of how the fuel system works.

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Feb 5, 2016 | 08:11 PM

#24

Bird-Dog 250

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From: Otto, NC

Quote:

Originally Posted by Jarrett Campbell

I'll actually be in your neck of the woods next week. Going to be spending two weeks in Augusta GA for a job.

PM me when you get the chance

Feb 5, 2016 | 08:28 PM

#25

ReBilld

Hotshot

Joined: Jan 2012

Posts: 11,132

Likes: 3

From: Southern West Virginia

Quote:

Originally Posted by Bird-Dog 250

In English what are you talking about?
Just did an oil change oil is good. Do these engines have a shut down switch if the oil gets low? I keep getting asked how the oil level is

This a picture with the fuel bowl removed. You can see the tin nut that holds the solenoid on the IPR. See if that nut is on there, and if not, is the solenoid slid back.

Feb 5, 2016 | 08:57 PM

#26

Bird-Dog 250

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Joined: Sep 2015

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From: Otto, NC

Quote:

Originally Posted by ReBilld

This a picture with the fuel bowl removed. You can see the tin nut that holds the solenoid on the IPR. See if that nut is on there, and if not, is the solenoid slid back.

Thanks! That picture is a big help. I looked under that hinged aluminum cover today and had no clue to what I was looking at. I did notice the aluminum nut was in place. I'll have to go back and look at it again to see if the solinoid has pulled out.
Where is the fuel pressure valve? Is it in this area? I was going to check the fuel pressure but I didn't see the fitting.

Feb 6, 2016 | 10:58 PM

#27

Jarrett Campbell

Cargo Master

Joined: Jul 2015

Posts: 3,076

Likes: 21

From: Aransas Pass, Tx

Lower front drivers side of the bowl (filter housing)

Feb 22, 2016 | 06:03 PM

#28

Jarrett Campbell

Cargo Master

Joined: Jul 2015

Posts: 3,076

Likes: 21

From: Aransas Pass, Tx

OK guys,

After busting out my shiney new AutoEnginuity and playing around with it, I successfully logged and saved a whole two minutes of data from Joe's truck

I'll post it on here too so someone smarter than me can try and decipher what is going on. I didn't see a duty cycle higher than 40% even when WOT on a slight grade. Also, the highest number I saw out of the MAP sensor was 20psia, 14@idle so about 6lb boost.

Also, the test drive took us by the location of the train crash from the Fugitive and a pretty sweet microbrewery. Good times in North Carolina!

https://www.dropbox.com/s/3kq6oka9t2...0Test.csv?dl=0

Feb 22, 2016 | 07:04 PM

#29

Bird-Dog 250

Thread Starter

Elder User

Joined: Sep 2015

Posts: 562

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From: Otto, NC

Jarrett!! Awesome job with the #'s. It was a great afternoon trying to figure out what makes this truck tick the way it does. You're welcome to visit again anytime your in town. Too bad we live 14 hours apart! My wife thought you were very nice to come all that distance to help me out! You taught me a bunch of things about my 7.3 I did't know too.
I look forward to the comments to come

In the meantime I'm ordering the sensors we talked about.

Feb 22, 2016 | 07:33 PM

#30

MI02SVT

Senior User

Joined: Dec 2014

Posts: 348

Likes: 0

After everything is warmed up and it had that shudder does it sound any different at idle like maybe a little rougher idle or different knock sound or is it just the same as when you first fire it up

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