Originally Posted by Tonylito
1) the choke and fast cam are operating properly - its getting power and opening power (its electric)
2) I disconnected linkage - its not binding.
3) "anti diesel" solenoid .. Is the plunger thing that is in front of the throttle? The throttle plate is not even close to the plunger and I unplugged it. Isn't this the thing that adds some throttle when you turn on AC?
Item 1 - how do you know? Did you measure the settings for the fast idle cam and the choke? Is the choke cover connected to both hot air and electricity? Did you inspect the choke plate while running and see that it is opening fully?
Item 3 - it's an idle stop solenoid. They are used both to boost idle speed with AC or whatever, and to prevent run-on ("dieseling") when the engine is shut off. When used to stop run-on, they are activated always while the key is on. When the engine is shut off, the throttle flaps close completely and kill the engine by shutting off air and fuel.
The carburetor should close down enough to kill the engine. If the idle stop is all the way out and the engine keeps running, you likely have a vacuum leak that provides air to the engine so it keeps running. Or, the carburetor was assembled badly and the throttle plates do not fit tightly in the bores. Or the fast idle cam is holding the throttle open. A closed throttle should kill the engine.
You need to do some simple tests - you can't expect to figure this out with just brain power (even the collected brain power here and at FSJN).
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
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Last edited by tgreese : 12-22-2021 at 03:08 PM.