Code 214
The DIS module on the 89-93 models is really prone to failure and can trip several different codes. Has it been stalling, failing to start until after a few tries occasionally and/or had the tach cut out from time to time? If so that is likely the case. If not, clear the code and keep driving and see if these symptoms start to occur. Usually when the module starts going, it's a long process and it will keep running with these symptoms happening more and more frequently until it finally gives out. If this happens change the module. DON"T forget to use a high end heat sink grease on the back of the module (Arctic Silver works best and can be picked up at most reputable electronics store) or it WILL overheat and die again. The other thing that I have seen happen on these cars occasionally is corrosion build up inside the wires on the front harness section for the ignition (connects to main harness on top of the blower runs to module, ac clutch, coil pack, cam sensor and crank sensor). Even though the wires appear fine and will show no resistance on an ohm meter, they have corrosion inside the wire jacket, which results in a slight voltage drop. Since fords DIS system uses such low voltage changes, this small amount of voltage drop can throw off the DIS module and make it behave the same way it does when the module is fried. You would have to do a voltage leakdown test on the wires.