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2001 Sport Trac Misfire, Number 1 Cylinder

Thread in 'Help Forum' started by James E. Downing Sr, Oct 13, 2020.

  1. James E. Downing Sr

    James E. Downing Sr Member 2 Wheel Drive V6 Engine

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    Got a misfire on #1. Good plugs, wires, and coil pack; should I try sea foam to see if it might be a dirty fuel injector? Any advice is appreciated.
     
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  2. DILLARD000

    DILLARD000 Member 2nd Gen Owner 4 Wheel Drive V6 Engine

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    What are the OBD2 TroubleCode numbers?
    1st thing to try, Carb\Throttle cleaner down the gullet.
    2nd thing, remove & clean MAF Sensor with electric spray.
    3rd thing, take ThrottleBody & IACValve off & clean.
    4th thing, pull #1 wire, electrical spray & inspect for nicks\cracks, re-install with di-electric on boots\porcelan not metal contacts.
    5th thing, take coilpack out, electric spray & inspect for nicks\cracks, check ohms.
    Primary should read 0.4~0.6ohm across pin4 to pin1\2\3, 0.7~0.9ohm across 2 coils pin1~2\pin1~3\pin2~3, open to frame all pins.
    Secondary should be 12~14kohm across each socket pair, open to frame all sockets.
    6th thing, how old are your plugs+wires? If >75k Miles, they're suspect, replace & gap to 0i052~0i056.
    7th thing, how old are your O2 sensors? If >75k Miles, they're suspect.
    8th thing, any hissing vacuum leaks or obviously cracked vacumm hoses.
    9th thing, recently cleaned\inspected\replaced the PCV valve & hoses?
    10th thing, could be a bad\dirty injector?
    Hope this helps.
    D

    PS: Details of my adventures maintaining a 2001 Ford ExST at
    http://2001fordexplorersporttrac.fandom.com/2001_Ford_Explorer_Sport_Trac_Wiki
     
    Last edited: Oct 13, 2020
  3. Todd Z

    Todd Z Well-Known Member 2nd Gen Owner V6 Engine V8 Engine

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    what are you basing your "Good" parts on ??
     
  4. James E. Downing Sr

    James E. Downing Sr Member 2 Wheel Drive V6 Engine

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    Sorry, "good parts" meaning recently replaced with new ones. plugs and plug
    wires.

    Thanks for all the TS tips.
     
  5. James E. Downing Sr

    James E. Downing Sr Member 2 Wheel Drive V6 Engine

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    Gonna try all of this and let you know. jimmy
     
  6. DILLARD000

    DILLARD000 Member 2nd Gen Owner 4 Wheel Drive V6 Engine

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    If new part(s) just installed & new problem(s) pop up; prime suspect is the new part(s) or something nearby\related that got damaged during that work.
     
  7. Todd Z

    Todd Z Well-Known Member 2nd Gen Owner V6 Engine V8 Engine

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    Yup, Like plugs, people crack them all the time and the wires they think they are pushed and clipped on and all they di was push the connecter further in the wore boot.... See it all the time..
     
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  8. EddieS'04

    EddieS'04 Well-Known Member 1st Gen Owner 2 Wheel Drive V6 Engine

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    Also check for corrosion inside the DI coil, on the missfire cylinder. My #3 misfired. it was corrosion on the aluminum. where the plug wire pluged in. I used a dremel tool with a straight brush and contact cleaner.
     
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  9. James E. Downing Sr

    James E. Downing Sr Member 2 Wheel Drive V6 Engine

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    Troubleshot found the #1 cylinder fuel injector was bad. Had to pull the top portion of the intake manifold to access the fuel rail; wasn't too bad. But the new injector was hard to find. O'Reillys had one. Removed and replaced; ops cked good.
     
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  10. Todd Z

    Todd Z Well-Known Member 2nd Gen Owner V6 Engine V8 Engine

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    Glad you got it...but I would have replaced all 6 injectors since you were in there but you have to do what you have to do..... Glad its back on the road.
     
  11. James E. Downing Sr

    James E. Downing Sr Member 2 Wheel Drive V6 Engine

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    I was going to replace them all, but there was only ONE injector to be had within 100 miles of my house and I needed the truck running sooner rather than later. At least now I know how to do the job.
     
  12. EddieS'04

    EddieS'04 Well-Known Member 1st Gen Owner 2 Wheel Drive V6 Engine

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    Good to hear it.
    You must have a gen2 v6 trac. Mine is the gen1 2004. My upper intake dons't overlap the injectors. I don't know why ford, went back to that type of intake. It makes some repairs an xtra pita.
     

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