I have a94 ext580efi that is fouling plug or plugs intermittently. is it injectors or sensors?
would like to fix with out taking to dealer. running br9eya cumputer light comes on and
then flashes once. fuel milage terrible about 4mpg.

Try NGK br9eya plugs. Should do the trick...It did on the stepmother sled. Same as yours.

i tried the br9eya,br9es,&br8es all seem to foul as easy. at the end of last season it would go
a 1/4 mile and foul or it might go 20miles before fouling. thanks for the suggestion

Something is out of whack and you need to find out what the computer code being flashed is telling you. From your description spark plugs won't fix your problem. If you had a shop manual for the sled it should tell you want the various LED flashes mean from the computer box. You could have a bad, or dirty injector, or bad sensor. I don't think that I can be any more help.

id have to agree,,, plugs arent your problem, you have a bigger problem,,, I would either get the manual, or take it to the dealership and let them take a look at it,,,,

according to the dealer the computer code is normal, some of the wires to the tps were
kinked, so i lessened that also sprayed the throttle return springs with penetrant. also ran some
jb injector cleaner seems to be starting better we will see about the fouling. thanks for the advice