[Michael C Henry]

My daughter had an Escort that started surging after warm up untill it finally died. Spent a wad ($600)with technician. Turned out to be the hose that supplied the MAP sensor ,manifold absolute pressure.A six inch piece of vacume hose was soft.When warm the engine went from a warm up mode to looking at all the sensors. The hose would colasp and the cumputer would start moving the idle motor and surges would get wilder until the engine stopped.
A freind of mine came over afterwork in the dark outside and ran it down in five minutes Oh yea he had a $3500 tester and another $1800 that would read the hertz signal that the MAP sensor sends.