Engine distrutior seems bad in an 1994 ford f 250 5.8l

Check the TFI module its the eletronic iginition module ford has problems with them can,t say for sure but if you can,t find any thing else this could be it Unless you want to check the coil you can do this buytaking a mulity meter set it to OHMS take the black lead from themeter put it on the negative termanul on the battery and the tach terminal with the red from the meter you should read .7 ohms to 1.7 ohms on the primary side of the coil if not in this range replace the coil And on the secondary side of the coil neg terminal bat to output wire main plugs into top of coil and dist cap you should read7.5 to 10.5 k 1000 ohms if not in this range replace the coil But likely its the electronic ignition module