My rpms jump and then my car stalls.

Your no start condition is either lack of fuel(doubtful since it used to restart) or no spark. No spark could be from a failed crankshaft or camshaft sensor.

Mass air flow sensor. Can be cleaned before you buy a new one

I also have a problem with my 2001 beetle my brakes jam on as soon as you touch the brake pedel and the only way to release then is to release the nipple on the caliper can any help its driving me mad

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

first check the throttle plate for carbon build up the look for the knock sensor harness rubbing onto the fan shroud

I have a 98 Windstar and it would die when pulling up to a stop sign, slowing when coming to a stop or making a slow turn. According to Ford recall 98E03 EMISSIONS RECALL some vehicles may stall during deceleration when coming to a stop, during slow speed parking maneuvers and/or coasting thru slow sweeping turns. This may be caused by the Powertrain Contro lModule (PCM) calibration dropping the rpms too quickly during deceleration. This involves reprograming the PCM. The revised calibration will allow the engine rpms to drop slowly during low speed maneuvers to reduce the possibility of a stall. Call your local FORD dealership (have your VIN handy) and have them check to see if this recall has been performed on your vehicle.

check for a vacume leak,or a pluged fuel filter,spark to ur motor,there is some things to look at wish i could c it well good luck.

check your body grounds sounds like a lose conection and also check the connection at the starter seloniod!!!

does this model have an ETS on it? Electronic throttle system. I could need a new throttle body. Sometimes the software goes bad and it will give the symptoms you described.

adjust idle speed