Anti-dieseling solenoid questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**IT Cowboy** · 02-28-2026, 10:36 PM

I connected my anti-dieseling solenoid on my Rochester carb tonight as it was not getting power. I connected to the 12v coil positive (hope that is ok?)

As I understand the solenoid is supposed to actually control the idle speed and the actual idle screw is only supposed to make contact at shutdown when the solenoid no longer has power.

My solenoid doesn't seem to have enough power to push the throttle idle beyond 800 rpm. That is about what the idle is supposed to be but is my solenoid bad? I put some brake cleaner on it and a little lube so I will see if it improves. Also is how I adjusted it correct?

02-28-2026, 10:36 PM	#1
IT Cowboy Senior Member Join Date: Jan 2025 Location: Arizona in a van down by the river Posts: 617	Anti-dieseling solenoid questions I connected my anti-dieseling solenoid on my Rochester carb tonight as it was not getting power. I connected to the 12v coil positive (hope that is ok?) As I understand the solenoid is supposed to actually control the idle speed and the actual idle screw is only supposed to make contact at shutdown when the solenoid no longer has power. My solenoid doesn't seem to have enough power to push the throttle idle beyond 800 rpm. That is about what the idle is supposed to be but is my solenoid bad? I put some brake cleaner on it and a little lube so I will see if it improves. Also is how I adjusted it correct? __________________ 1972 C10 Custom Deluxe Highlander 402 Freedom isn't safe, it requires you to take responsibility for your own life, your own safety, and your own success. It carries with it the possibility of failure and the understanding that you're working without out a safety net. If you give the state the responsibility for any of these you also give up the freedom that accompanies the responsibility.



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