old car. If you want simple guessing , just wait it will com.e...
long:
on new cars, it be lack of engine power (or DTCs stored showing bad problems, with LEAN fuel, or EGR stuck open or throttle motor sticking) but back WHEN its vastly more crude and simple and problematic.
I'll answer for USA cars. and stock systems,
all the above same but not throttle elect. motor. no throttle by wire then/.
there are 2 systems, vacuum mech. or electro mech.
one yanks the throttle , the other adds metered air to control speed.
just one glance at it and bingo , post a photo.?
caravan ,not grand caravan
which enigne, of the many, cruise parts can vary by engine type.
my online shows 5 engines and not one PCM has cruise pin(s)
its a separate system then, found in the last chapters in the FSM.
2 possibles.
- (engine running lean, at cruise, or misfiring) (tune up time>?)
- or the cruise parts are bad.
id say the cruised servo motor is bad or its valve. sticks.
if parts are sticking clean it , lube it and it might correct.
I do not have access to the servo data. at all.
join a real dodge forum and get that.