AC on idle issues - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Accelo** · 05-16-2022, 01:17 AM

I have a mostly stock LS1 with an automatic in my 70 C10. The ls1 does have a small camshaft installed. Advertised as No converter necessary.
I am having idle issues when the Air Conditioner is on. There an input to the ECM that tells the motor when the air conditioning is activated. I can see it when I scan the computer but there isn't a wire from the A/C connected to the ECM in any way. However, I am not exactly sure of the function of the "A/C is on" parameter. Does it increase the idle?
Just wondering if it’s required or would help my solve my idle issues, the motor dies with the air on.

05-16-2022, 01:17 AM	#1
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,296	AC on idle issues I have a mostly stock LS1 with an automatic in my 70 C10. The ls1 does have a small camshaft installed. Advertised as No converter necessary. I am having idle issues when the Air Conditioner is on. There an input to the ECM that tells the motor when the air conditioning is activated. I can see it when I scan the computer but there isn't a wire from the A/C connected to the ECM in any way. However, I am not exactly sure of the function of the "A/C is on" parameter. Does it increase the idle? Just wondering if it’s required or would help my solve my idle issues, the motor dies with the air on.



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