Quote:
Originally Posted by chengny
Below is a description of how to check the operation of the "fast idle solenoid" - which is what I think you are asking about. It was only used with A/C systems. I'll you draw your own conclusions about whether your new solenoid is operating correctly - I think it is.
There is another type of solenoid used with Q-jets. Called an "idle stop solenoid" and that was used in a primitive attempt to prevent dieseling (i.e. run-on). I believe the part was actually the same - but it functioned and was mounted on the carburetor differently. Rather than bump idle up upon an increase in load, it would reduce idle. Also, I am pretty sure it only was installed in trucks with manual transmission applications:
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This is the part I ended up with
https://www.summitracing.com/parts/s...olet/year/1984
Maybe it’s not correct but everything bolted up and lined up correctly. I was under the impression that when the ac was activated it would kick the idle up. The wire that runs to it is energized when the ac is turned on. Problem I’m having is that it won’t kick the idle up, it will hold it at a higher rpm if I give it throttle and then let off. Maybe that’s correct for these trucks, I just wanted to make sure there wasn’t anything wrong with this one.