Motor starts then dies

[Matthirsch111]

I have a 2018 peterbilt 579 with a Cummins x15 with 420,000 miles
Every so often the motor starts up for anywhere to 30 seconds to one minute than dies
Sometime takes up to an hour to start then will run fine all day and for the rest of the week
Then out of the blue in the morning it will do it again
I do oil and fuel filter change and every 15k miles
This morning tried for an hour and a half and the batteries finally gave out
Any ideas ? I am new owner operator and need truck to run obviously
Thank you in advance

[Rawze]

loosing fuel prime.. and sucking air?.

What is the fuel pressure showing while cranking?.

[Matthirsch111]

(01-04-2024 )Rawze Wrote:  loosing fuel prime.. and sucking air?.

What is the fuel pressure showing while cranking?.

We replaced filter and water separator
Not sure what fuel pressure is

[Bengy88]

Also do a leak-down test and ensure it passes...

https://odysee.com/@rawze:d/isx-injector...e-cm2250:e

Here’s a link assuming you have insite

[Matthirsch111]

(01-04-2024 )Bengy88 Wrote:  https://odysee.com/@rawze:d/isx-injector...e-cm2250:e

Here’s a link assuming you have insite

I meant to say I don’t know what the fuel pressure is don’t have a gauge
I don’t have onsite but a shop I know is coming to look at the truck tomorrow

[PolishHammer]

Is the electric lift pump working can you hear it with a key cycle?

[tree98]

(01-04-2024 )Matthirsch111 Wrote:  I meant to say I don’t know what the fuel pressure is don’t have a gauge
I don’t have onsite but a shop I know is coming to look at the truck tomorrow

You NEED to get yourself a laptop and the cummins insite program. You said your a new owner op....... well the quickest way out of business is to rely on shops to keep you on the road. Buy tools, ask questions here, and learn to fix your own truck. Here's a link to insite and an inline 6 adapter that you would need to help you diagnose your truck.

https://www.ebay.com/itm/186184728681?mk...media=COPY

[Matthirsch111]

(01-05-2024 )PolishHammer Wrote:  Is the electric lift pump working can you hear it with a key cycle?

Yes

[Matthirsch111]

(01-05-2024 )tree98 Wrote:  

(01-04-2024 )Matthirsch111 Wrote:  I meant to say I don’t know what the fuel pressure is don’t have a gauge
I don’t have onsite but a shop I know is coming to look at the truck tomorrow

You NEED to get yourself a laptop and the cummins insite program. You said your a new owner op....... well the quickest way out of business is to rely on shops to keep you on the road. Buy tools, ask questions here, and learn to fix your own truck. Here's a link to insite and an inline 6 adapter that you would need to help you diagnose your truck.

https://www.ebay.com/itm/186184728681?mk...media=COPY

Ok thank you