My 88 F150 has been idling poor or not idling at all, surging at stop
lights and poor acceleration like a plugged converter. I've changed the
exhaust system(converter also), IAC, EGR,plugs, wires,cap,rotor and fuel
filter.No change, but if I unplug the vacuum hose to the map sensor, it
idles good again cept for some black smoke from exhaust pipe.Dumb
question, but sound like I need a new MAP sensor?I'm tired of putting
money in where it doesn't belong.