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Cat Man
Cat Man, Cat Engine Expert
Category: RV
Satisfied Customers: 8419
Experience:  23 years Caterpillar Engine experience
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How do you adjust the idle of a 3126B cat engine in our

Customer Question

how do you adjust the idle of a 3126B cat engine in our motor home
JA: How many miles are on the car? What size is the engine?
Customer: 300 horse power 2001 Harney
JA: Are you fixing your 300 yourself? What have you tried so far?
Customer: yes adjusting with cruise control failed
JA: Anything else you want the mechanic to know before I connect you?
Customer: trying to reduce idle speed
Submitted: 1 month ago.
Category: RV
Expert:  Cat Man replied 1 month ago.

Thanks for asking your question. I will try and help you out.

The low idle of your 3136B engine can be adjusted between 700 and 800 rpms. This is done by having someone with Cat ET software go into the engine ecm and change the setting.

Are you wanting to raise or lower the idle speed of the engine?

Customer: replied 1 month ago.
trying to lower the idle speed
Expert:  Cat Man replied 1 month ago.
I see. To lower the idle speed. You will need to have someone with Cat ET software reprogram the low idle setting in the ecm. It will only take them a few minutes to do this.Please reply back if you need more help or have more questions. I am happy to assist.
Expert:  Cat Man replied 1 month ago.
Hello? Are you there?
Expert:  Cat Man replied 1 month ago.
Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.