Re: low idle miss
Well...
Mine sometimes does something that sounds very much like what you describe: Only at low idle, when cold, more often if it has been idling for some time (as in idling until it gets warm), never noticed it if the idle is hovering closer to 1000, almost never after it has finished a romp or two along some deserted blacktop.
Like you, my mileage on the flat in cruise is 26-28 at 70mph or a little over, pulls like a 'beast' with the hammer down. I'm curious too, but there are other things I want to focus on - like a vibration - so that niggling little low idle "tick" will have to wait. Always something to putter with, huh?
But, back to your quest...
If the spark is eliminated, I would be curious to see what a vacuum gauge would tell me. A leaking valve would cause the gauge needle to "tick" (lower vacuum) in rhythm with the revolutions.
That being OK, (whew) then I would be wanting to check the resistance of the suspected injector coil(s). 12Ω Â± 1 Ω, according to my FSM is OK. 9Ω or less is a sign the coil is breaking down and the miss my be due to an injector.
Then, a compression check might shed some light on the path.
Do keep us informed!
P.
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