Got a 87 caravan, with the 3l V6. its having some running problems.

from cold, it'll often just die at idle. has to be revved up a bit to
get it going.

When it running, especially when warm, at low levels of throttle,
it'll sound like a lot of misfires, (a rappid popping sound) and have
no go at all, letting off, or pressing down the accelerator will mae
it go. it doesn't ahve any problems over 1/2 throttle, just this 'dead
zone' around 1/4-1/3 throttle, and usually only at a standstill, or
accelerating out of a corner. At busy intersections, i've taken to
flooring it, and to hell with the tyres.

it had an oil change about 1100 miles ago, and has castrol 10W-30. i'd
read somewhere that an engine which hadn't had an oil hcange for a
while would act like this, but its not made any difference. its the Se
model, if that makes any difference.