» » »

Ford Q&A

Ask Your Question

1993 Ford F-150 Question: engine surges then bogs down only between 1000 to 1500 rpm driving and idling.

 

Question

frydaddy1, 5.0L V8, North, SC, February 11, 2013, 12:17
 Rookie

does it only while giving it throttle. smells rich. what could it be? no codes but one time the ck eng light came on and it suddenly cleared up temporarily

3 Answers
Flag This
  • Answer #1

    Greg's Orange Auto (12205 Answers) , Orange, CA - (714) 361-9386
    globalhelper February 11, 2013, 12:44
     Master

    poss plugged exh system.confirm with muffler shop

    Flag This
  • Reply

    frydaddy1, February 11, 2013, 12:55
     Rookie

    wth? would do it all the time if that was the case

    Flag This
  • Reply

    globalhelper, February 11, 2013, 13:15
     Master

    the more throttle u give the less exh can leave your system and will cause excessive back pressure

    Flag This
  • Reply

    frydaddy1, February 12, 2013, 11:08
     Rookie

    thanks but it runs fine above 1500 rpm. does this change anything?

    Reply
    Flag This
  • Answer #2

    csubak30 February 11, 2013, 14:40
    Profile_thumbnail
     Master

    Agree with #1

    Reply
    Flag This
  • Answer #3

    bmdouble February 11, 2013, 21:13
    Profile_thumbnail
     Master

    The symptoms sound like a clogged exhaust,but another possibility that can cause a rich running concern is a faulty air charge sensor that is mounted in the lower intake.Whrn these go out they can make the exhaust glow cherry red due to excess fuel injected into the engine.Just a thought,and easy to check by removing it and looking at it.

    Flag This
  • Reply

    frydaddy1, February 12, 2013, 11:07
     Rookie

    Thanks. I think what everyone else missed is that it runs fine above 1500 rpm. the surge and die stuff cycles over and over between 1000 and 1500 rpm. I should have been more clear. it idles fine, just not at low rpm with throttle and honestly my exhaust needs to be replaced. btw it doesnt have a cat just true duals and a small crosspipe where the o2 sensor is.

    Reply
    Flag This