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I'm having weird issues, truck will shut off while driving,

Customer Question
Hi! I'm having weird...

Hi! I'm having weird issues, truck will shut off while driving, only for 2 seconds or so, I'm thinking ecm wiring, do you have a diagram? 2ws cat motor. Thanks!

Mechanic's Assistant: Hi there. The truck Mechanic will know what to do about your motor. Do you have any other details that could be helpful?

Problem started slow, now more frequent, I lose tach and speedo as it shuts down then turns on again

Mechanic's Assistant: Is there anything else the truck Mechanic should know before I connect you? Rest assured that they'll be able to help you.

99 kenworth, and have replaced all sensors

Submitted: 2 months ago.Category: Medium and Heavy Trucks
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Answered in 5 minutes by:
7/25/2022
Technician: Nich1019, Cummins/Caterpillar Technician replied 2 months ago
Nich1019
Nich1019, Cummins/Caterpillar Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 2,877
Experience: Expert
Verified

Good evening and welcome to JustAnswer! I'm Nick and I'll be helping you out today. Please give me a few minutes to review your question and I'll be right back.

How are you doing today? Can you provide the last 6 of the VIN?

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Customer reply replied 2 months ago
Doin good! 953748
Technician: Nich1019, Cummins/Caterpillar Technician replied 2 months ago

That's good! I'll pull up a schematic for you here in a few minutes. Are you ever logging any faults? Does the check engine light ever come on?

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Customer reply replied 2 months ago
as it sputters down the check light and shut down light come on with fan, 2 seconds then as I'm gliding in gear she flames again, also does it idling, will kick it off high idle,Codes used to read a 46, but that one went away, today it's a 26.
Technician: Nich1019, Cummins/Caterpillar Technician replied 2 months ago

Ok. I'll be right back with schematics and information on those faults.

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Customer reply replied 2 months ago
OK awesome, yeah couple years ago a power wire was put on the ecm from battery, because of a no start, but now I'm leaning towards ground wires to ecm
Technician: Nich1019, Cummins/Caterpillar Technician replied 2 months ago

Information: click here

Click the above for the information.

I wouldn't typically attribute these faults with a power or ground supply issue, but it's definitely a possibility. Has the Cat side engine harness been replaced?

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Customer reply replied 2 months ago
No it hasn't, looks all original
Technician: Nich1019, Cummins/Caterpillar Technician replied 2 months ago

I would probably replace the Cat side harness if it's original. I don't typically throw parts at an engine, but it's getting close to 25 years so it probably could use one.

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Customer reply replied 2 months ago
Your thinking a sensor wire could be the culprit?
Technician: Nich1019, Cummins/Caterpillar Technician replied 2 months ago

Yes. If the barometric pressure sensor has been replaced, the wiring would be the next most likely cause of the 26. The 46 could be an electrical issue also, even though it's a low oil pressure fault. If the harness is brittle and worn, it could also be causing an intermittent connection to the timing/speed sensor. That will cause the symptoms that you're experiencing.

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Customer reply replied 2 months ago
Very interesting, OK thank you so much
Technician: Nich1019, Cummins/Caterpillar Technician replied 2 months ago

No problem!

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Technician: Nich1019, Cummins/Caterpillar Technician replied 2 months ago

If you would like to ask me another question in the future, you can add me as a favorite Expert. You’ll have the option to do that on your “My Questions” page.
My goal is to provide you with excellent service. If you have any follow-up questions, don't hesitate to ask! Thank you for using JustAnswer and have a great day!

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