Running too rich, need help please!
Hello. I just bought a 90 E150, 4.9 EFI, automatic. The truck runs incredibly "eye burning" rich. I replaced the cap, rotor, plugs, wires and temp sensor at the thermostat housing. I also cleaned the IAC. I can't figure out why it runs so rich / extremely poor mileage. Also stumbles when accelrating from idle. Would really appreciate any advice. Thanks.