Had the same problem, the problem with mine was a hole in the vacuum line, listen for hissing noises
fuel filter
Could be several causes: Clogged fuel filter. Clogged/dirty fuel injectors. Spark plugs need changing.
If your Ford Aerostar sputters at high speeds, you might have a problem with the fuel injection system or with the fuel filter. You could also have water in the fuel lines, bad gas, or even a spark plug fouling issue.
Could be dirty fuel filter or you need a tune up?
could need a tune up---plugs, wires, fuel filter & air filter...good inexpensive way to start
try both tuneup and fuel filter change
Intake manifold air leak or you need to put some fuel injector cleaner in. Did you gap your plugs correctly?
clean your injectors
it could be a bad fuel filter and fuel pump
Several things could cause this problem. The fuel filter could be stopped up, or a fuel, injector could be clogged or nor operating properly. Reading the computer code should show if there is another problem with the engine.
i have a 91 Chevy lumnia when i give it gas going down the road it sputters and when i stop at a light it will quit unless i keep my foot on the gas?
The most common issue is a fuel filter. It could be a few other things, but the fuel filter is where I would start.