My son has a 1995 Ford Probe, We have changed the plugs, wires, Dist. cap. & the distributor. A mech. told us it might be the Mass Air Sensor, we changed the M.A.S. and it still is not working corecctly. It will start, but after running for a while, it sound like it is missing. It won't go over 45 mph, it wont idle & it stalls if you sit still.
Apparently we have changed the fuel pressure regulater swich, it's been at a Ford service shop and it was put on the computer there. According to the mech. the computer reads the Mass air flow, but we have put 4 Mass air flow sensors (the entire throttle body, and map sensors) and the car just got worse everytime. The fuel system was supposedly check at the Ford dealership. We are getting a rich code in bank one. We cleared the computer before we took it to the Ford Dealership. It has been on 2 different computers now. Boy this is frustrating. Any suggestions would be helpful (except the one suggesting we get rid of the car)

 

check cat.converter

 

based on what happened to the 95 probe i have, i'd like to bet its your ignition module, assuming that you have the 2.5 v-6 that mine has, its inside the distributor, so you can replace the whole thing if you go with your local auto parts store (special order) or find one like i did at the junk yard. these things are infamous with the probes, so even if you go to the junkyard it may be difficult to find since repair shops and dismantlers that send their people to the yard are all over them...good luck