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engine surging

Discussion in 'Ford Trucks' started by asphalter1, Mar 9, 2003.

  1. asphalter1

    asphalter1 Junior Member
    from 08527
    Messages: 24

    On my 94 f250 5.8 efi heres the problem, when i start it it idles fine but after about a minuite it starts to surge , if i put it into gear the rpms come up and will bang hard into gear.Thanks
  2. Mike 97 SS

    Mike 97 SS Banned
    from U.S.A.
    Messages: 1,106

    A surging Ford vehicle usually means a bad IAC solenoid. Idle Air Control. They go bad quite often. Before going and changing it, wait for some more replies. Mike
  3. paul soccodato

    paul soccodato Senior Member
    Messages: 430

    mike, thats what i was thinking also.

    it could be the iac solenoid.
  4. wyldman

    wyldman Member
    Messages: 3,265

    Actually the IAC very rarely goes bad on most Fords.It can get a little sticky,or dirty but they rarely fail.

    Check the basics first,like an ignition miss,vacuum leaks (very common to see cracked plastic hoses around the intake plenum),fuel pressure,etc.

    Next step would be to pull any codes and see what you get.Post them here and we'll help you through it.

    CARDOCTOR PlowSite.com Addict
    Messages: 1,304

    usually you can remove and clean the iac but your better off just replacing it