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99 sport runs like garbage

Discussion in 'Stock 1995 - 2001 Explorers' started by stonerboys, November 13, 2018.

^^Searches ExplorerForum.com^^





  1. roscoe 0202

    roscoe 0202 Active Member

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    City, State:
    salt lake city utah
    Year, Model & Trim Level:
    1999 explorer sport
    check your gas cap if it leaks it will show too much air in evap circuit
    roscoe
     
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  3. stonerboys

    stonerboys New Member

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    City, State:
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    Year, Model & Trim Level:
    99 Sport
    It was replaced before because the original one was bad...could be a possibility too. Thanks!
     
  4. Turdle

    Turdle Moderator Staff Member Moderator Elite Explorer

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    Year, Model & Trim Level:
    2000 Mounty
    Check all your fuses. There is one which protects the o2 sensors and evap valve stuff. It's worth a shot.
     
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  5. 410Fortune

    410Fortune Firewood Season Staff Member Moderator

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    Year, Model & Trim Level:
    B2 Slightly Modified
    I doubt its gas cap.......
    He has a canister vent circuit malfunction code, not a too much air code.

    A too much air code would tell you the canister vent is doing its job, working. In his case I am guessing he has a dead short in the sensor/wiring.
    Rusty area + canister vent been mounted up there since 1998 = Circuit malfunction lol

    OHV had 3ea 02 sensors, never 4?
    I don't think unless it was a late 99-2000 thing, 2000 last year of OHV 4.0
    R.I.P.
     
  6. sport40

    sport40 New Member

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    Location:
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    Year, Model & Trim Level:
    2001 explorer sport
    i have a 2001 sport and it had a miss i couldnt fix and it ended up being a valve in the head, miss on # 2 cylinder was code. replace the head, fixed problem, the sohc motors get carboned up bad if not driven hard a few times a yr.
     
  7. stonerboys

    stonerboys New Member

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    Mine is an OHV motor. It was always started and ran for about 10 mins or so the whole duration of it sitting. It just started acting up when it got really cold up here in lake so I’m thinking it’s either a vacuum issue or it very well could be the intake gaskets. It isles erratically but if you rev it up or floor it while driving it seems to run fine. It’s missing under a load and at idle but wide open throttle it seems to run just fine. I’ll figure it out eventually
     
  8. stonerboys

    stonerboys New Member

    Joined:
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    City, State:
    Pennsylvania
    Year, Model & Trim Level:
    99 Sport
    Mine is an OHV motor. It was always started and ran for about 10 mins or so the whole duration of it sitting. It just started acting up when it got really cold up here in Pa so I’m thinking it’s either a vacuum issue or it very well could be the intake gaskets. It idles erratically but if you rev it up or floor it while driving it seems to run fine. It’s missing under a load and at idle but wide open throttle it seems to run just fine. I’ll figure it out eventually
     

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