My 95 5.8 E150 with 125 thousand miles idled like someone was shutting off the ignition and turning it back on instantly every ten seconds or so after the engine warmed up. It also would buck when I accelerated or cruised. If I disconnected the TPS or the MAP sensor and then started the motor the idle problem would disappear but the van wouldn't run right. After changing the TPS, MAP, EGR and sensor[my only code], and the module and of course a complete tune I still had the problem.
I finally installed a reman computer from Advanced Auto and the problem is solved.
I think that when the computer went from open loop to closed loop that it's defect
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