[Username1]

.

I don't remember you saying the car had O2 sensor or not. If not, then there is no way
the car can run in closed loop - so it depends on stored look-up tables for engine
parameters - This can result in a possible miss. Also don't forget ethanol fuel most
likely did not exist back in '83. There are so many little things that can cause
a miss in those older cars.

Any sticking valve (electric, temperature, or vacuum) can cause a miss, or stalling.
My parents had a 1979 Ford LTD back in the day and it would stall getting off the
freeway, turns out a sticking EGR valve was the trouble. Otherwise it ran great
for years.

Your best bet is to get the original 3" thick manual written by ford, and get to
know the system inside-out.

Also - the thin hard plastic vacuum lines were to get a faster response from the
item at the end of the line. Hard walls, thinner line, all for less volume in the
line to change when vacuum was applied. I have them on my 88 Dakota,
I think it helps the HVAC stuff respond fast.

.

.