It could be your TPS (Throttle Position Sensor) on the early EFI systems they are real touchy on adjustment. The only adjustment is the idle stop screw and it has to be set to 1.0 volt measured at the center lead. If you can't get it there, then it will need replacing. Do not use an aftermarket, only a Motorcraft one will work correctly!
Bill Vose (Old School Hot Rodder) 1986 F350 crew cab DRW 460ci EEC-V MAF/SEFI, E4OD, PMGR starter, 160 amp 3G alternator, 12X3 1/2 rear brakes, Traction lock 3.55
1995 Lincoln Continental (project car), 1994 Taurus LX (daily driver) http://www.oldschoolhotrodder.com
"growing old is inevitable, growing up is optional"
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