1999 ford windstar stalls at 30 to 50 mph when at

somehow losing vacume the controls blend sdorr

well,whoever did the transmission needs to look at it again.It sounds like a solenoid problem internally in the transmission.or a plug,wiring,or vacuum leak

Figure 72: Fuel Rail Components

Engine fuel temperature sensor which measures the pressure of the fuel near the fuel injectors. This signal is used by the PCM to adjust the fuel injector pulsewidth and meter fuel to each engine combustion cylinder.

that is normal on this vehicle you can't go over 4000rpm into park position that way you can't demage engine.

That was a common problem on Windstars. It is frequently caused by binding in the tie rod end. It presents as either a clunk or something akin to a dot matrix printer. It rarely shows up as a problem on a normal inspection of the tie rod but can cause problems later.

buy manual, have scanner ran, you can buy a cheap one at auto parts store, check throttle position sensor if it has one

I would change the temp sending unit on the engine first.

it is one of two things: the thermostat or the temp sensor by the thermostat housing

if it keeps stalling it could be an obstructed fuel filter, a weak fuel pump, or your tps(throttle position sensor) is faulty.

there are too many reasons...

it could be fuel pump,, it could be ignition coil overheating, it could be the computer itself...

you need two things for the engine to run,

1 is gas
2nd is ignition,,

with these two misfiring or your loosing one of them, it will stall...

i hope i was able to give you some thoughts....

drcool