2001 Ford Windstar runs rough.

I would suggest you run a compression check on this engine and also have the coolant recovery tank tested for the presence of combustion gases with a gas analyzer, any gases would indicate a leaking head gasket. Any engine cylinder that is lower than 5% of the highest reading cylinder in pounds per square inch has a problem like a scored cylinder or leaking intake or exhaust valve seat.

Ignition misfire, leaking intake gaskets, faulty fuel injector. Is the check engine light on and blinking with engine running?

Hi, Try to replace fuel filter. It maybe clogged up and making engine run rough or poor. Also check and replace spark plugs. A bad spark plug will make it run rough too. Good luck.

Have you check for vacume leaks. This would make run rough but not set off you check engine light.If no leaks are found might want to change your vacume pump. Located in front of engine where all your vacume lines run to, Looks like a sm filter. This is usually priced less then $10, Good luck to you.

It's common for ignition coils to go on these vehicles. If you have a spark tester (auto parts store) install it on your #3 plug wire and check for a strong spark. By swapping the wire you obviously eliminated it as a possibility. There's always a chance that you have a compression problem or ad injector problem but chances are it's just a bad ignition coil. Mark the wires then remove them. You can remove the coil without accessing major components but it will be tight. Disconnect the connector and remove the bolts.

If not, look at the coil for hairline cracks. I see a lot of coils go bad and the vehicle will run worse when it's damp or raining out. Good luck!

escape 2001 runs rough, but after a certain speed ( 50 mph ) runs smooth.

might be something as simple as changing the spark plug or related wire, could also be damadge to the valve train or piston and cylinder bore

2001 Dodge Caravan FWD
3.3 liter V-6 VIN "R"Cylinder # firewall, Passenger to drivers side, 1-3-5
Cylinder # radiator, Passenger to drivers side 2-4-6

Coil Block post # firewall, Passenger to drivers side 5-1-3
Coil Block post # radiator, Passenger to drivers side 2-4-6

Good luck

evaporator is part of the fuel system, missfiring could be spark plug or bad coil

generally, when the engine is washed, water gets trapped behind the spark unit and stays there, creating a shorting path for spark plug current. best to dis-mount the spark unit (follow plug wires back to source) and dry and clean it thoroughly.