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ford surging

Discussion in 'Ford Trucks' started by Mr Patrick, Jan 8, 2007.

  1. Mr Patrick

    Mr Patrick Junior Member
    Messages: 26

    I have a 93 bronco 5.0l While driving or a idle it will every once in awhile surge just a small flutter maybe 100-200rpm. Any Ideas on what might be causing this any help would be great Thnks Patrick
     
  2. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Could be the idle air control or the throttle position sensor.
     
  3. Proscapez LLC

    Proscapez LLC Senior Member
    Messages: 293

    Try tapping on your mass air flow sensor, they tend to short out causing those kind of issue's.
    Also try unpluging the mass air flow sensor while it's running and see if that makes a change.
    It also could be dirty.
     
  4. Midwest BuildIt Inc

    Midwest BuildIt Inc PlowSite.com Addict
    Messages: 1,280

    They don't have a mass air flow sensor..
     
  5. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    Go to your local parts store or Ford Dealer and buy a can of throttle body cleaner (Not Carburetor cleaner as this will damage the coating on the throttle plate) and remove your idle air bypass valve located on the side of the throttle body clean that out along with your throttle body it should help, also check your EGR valve as it could poss. be stuck open a little bit, you can also clean that as well. When you have your EGR valve off it's a good idea to start your engine for about 5-10 seconds to clean out any loose particles in the exhaust port. Hope this helps.
     
  6. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Make sure your throttle cable and cruise control cables are in their anchor points on the throttle end.They can slide up in their little square holders they set in.This can cause problems with binding since the throttle plate can't completely return to idle position.
     
  7. Mr Patrick

    Mr Patrick Junior Member
    Messages: 26

    thank you all for your help. Bad egr valve. Hope you all get some snow Patrick
     
  8. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Make sure the vacuum switch is not sending vacuum to the EGR at idle. I replaced both the switch and the EGR. If you have emissions checks in your area make sure your vacuum reservoir / can is not rusted out.It supplies vacuum to all the stuff that uses it.
    If it is, I can tell you how to fix it.
     
  9. Mr Patrick

    Mr Patrick Junior Member
    Messages: 26

    Hey thanks for your help,been busy salting but will check on that soon thanks Patrick
     
  10. PremierLand

    PremierLand PlowSite.com Addict
    from detroit
    Messages: 1,572

    I had the same thing happen to my 94 f150 5.0 at around 125k miles or so. If I recall correctly it was an oxgen sensor, but I could be mistaken, as that truck was a pos and everything broke on it and had to be replaced anyway.
     
  11. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    There are other things that can cause surging and idle problems. Chasing intermittent problems can drive you nuts. Till it fails for good they are real hard to find. Try to do -testing - research - read the repair manual and stay away from just replacing parts. It will just upset you when the $35 part did nothing to solve the problem.
     
  12. BOSS550

    BOSS550 Senior Member
    Messages: 212

    Fuel filter starting to plug up comes to mind speaking of cheap parts that can drive ya nuts:dizzy: