1994 E350 460/7.5 surging, stalling, stumbling
I have a 1994 E350 15 passenger shuttle bus with a 460/7.5 engine that cuts out at idle and most any other speed. It surges at an idle but never dies. It runs good under acceleration, but as soon as I ease off the gas and start crusing down the road at any speed, it starts an erratic miss where it stumbles and jerks.
At this point we have done a major tune-up (plugs, cap, wires, rotor and coil) along with a MAP sensor and TPS. Also misc. vacuum lines.
Can anyone help?
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