No
It will cause the check engine light to come on with no benefits.
Fuel supply... Sounds like the engine might not be getting enough.Fuel filter and/or fuel pump not pushing enough to keep the engine up to speed.See "Related Questions" below for more
A serious vacuum leak could cause that.
Not that I know of but have a mechanic check to see if there is a stick or something caught behind a wheel.
Yes.See "Related Questions" below for much more about the Windstar EGR / DPFE system.
Well....Seeing how this happened to me a month ago I'll give you a heads up. Worst case you could've bent a connecting rod (Hydraulic Lock-Up), or maybe sucked enough water (mists of water) through the air intake to thin out the oil to a point where you spun a bearing, or you even could've bent a valve. BUT... Driving through puddles isn't a big deal. Calling roadside assistants from the middle of a river is.
Bad bearings or bad piston rings
Try this solution. http://www.leckemby.net/windstar/windstar01.html It seems that Windstars have a problem with the intake manifold.
If you have a "check engine" light on, start with having the codes read. A misfire code can tell you which cylinder or cylinders are having problems. A misfire could be the cause of your engine vibration.
no, door locks have nothing to do with check engine light.
Could be a number of reasons for this condition. I would check the coolant level. A low coolant level could cause your heater to blow cold air when the engine is warm. Is the engine warm? If the engine is fluctuating temp it could be a faulty thermostat. Hope this helps.