Tell the kids to give it to me.
The EA's (or throttle slides as MB calls 'em) Will gum up, get twitchy readings from the refernce sensors and such, get a qualified tech who is familar with this system to check it out. The short harness on the EA will also go feet up as will the engine harness in general. There also is a vent hose on the r/h valve cover of the 119 the will go bad causing some weird issues as they collapse. (this hose leads straight to the base of the ea)
94 should run a seperate ECU for CC/ISC/EA called E-GAS.