Most likely it is due to water or dirt in the carburetor. The carb will need to be disassembled and cleaned.
fuel filter
I had the same problem with a jeep wrangler and I replaced the throttle position sensor and that solved my problem.
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.
It depends on how long the car stays running for. If it turns over and then shuts down after a few seconds and sputters it could be a fuel filter. If the car runs for a few mins and then dies out it could be a computer problem. The ECM might be starting to go.
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.
Could be your power packs, either one or both.
my 92 98 spits and sputters when you go around a right turn
try both tuneup and fuel filter change
i have a 1994 eclipse with a 1.8 we replaced the head gasket and timeing belt now it sputters at low rpms an the check engine light is on what could be th problem ?
Had the same problem, the problem with mine was a hole in the vacuum line, listen for hissing noises
to me that sounds like many tings could be wrong with it lines are dirty, tune up, bad gas, or idle is too low
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?