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Have a 1990 GMC TOPKICK with a 3116 cat I trun the key off…

Customer Question
Have a 1990 GMC...

Have a 1990 GMC TOPKICK with a 3116 cat I trun the key off and eng. will no shut off

Mechanic's Assistant: What is the complete model and serial number of your machine?

It is a1990 gmc topkick fire truck

Mechanic's Assistant: Are you fixing this yourself? What have you tried so far?

Yes try ign. switch , disconnect ALT. check all fuses

Mechanic's Assistant: Anything else you want the Equipment Mechanic to know before I connect you?

That it

Submitted: 2 years ago.Category: Medium and Heavy Trucks
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Answered in 5 minutes by:
6/12/2020
Technician: Cat Man, Cat Engine Expert replied 2 years ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
Verified
Thanks for asking your question. I will try and help you out.
There are two things I would suspect.
First is the shutoff is faulty.
Second is a problem in the governor. The linkage has been known to fail and not allow the engine to shutoff.Please reply back if you need more help. I am happy to assist.
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Customer reply replied 2 years ago
The truck has a battery switch on it cut it off truck turns off.Does it have a relay for the fuel shutoff
Technician: Cat Man, Cat Engine Expert replied 2 years ago
I see. Thanks for the information.Then the shutoff solenoid is not getting power removed. Most likely a faulty relay or switch. Not sure where they Are located.
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Cat Man
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