misfire

  1. J

    Transmission Grumbling & Misfire

    Hi All, New member and new owner of a 2010 Expedition XLT with the 5.4 Triton and 6-Speed auto in a tight spot. Purchased the vehicle in July of 23' (Super clean with 1 previous owner) with a salvage title & 32,000 miles. Vehicle had suffered light front end damage (pre repair pic attached), no...
  2. Digital_Dad

    2011 Expedition 5.4l 3v P0301 Cylinder 1 Misfire

    It has a permanent P0301 that doesn't erase when codes are cleared 2011 Expedition 5.4l 3v Started by swapping the #1 coil with the #2 coil, erasing codes and starting it up and rerunning the code reader, still get P0301, so swapped plugs between 1 & 2, erased codes ran it and reran codes got...
  3. C

    2017 Expedition - Jerky acceleration, misfires (P304, P300, P305)

    Hello Expedition Owners. I have a 2017 Ford Expedition Limited (2nd gen Ecoboost 3.5L V6) with 120K miles on it (purchased at 72K miles). I am hoping for some help and direction with the current issues I am experiencing. When I punch the gas to accelerate rapidly, often times the truck will...
  4. J

    2019 Ford Expedition Max Limited - Misfire, Rough Idle, dealer can't seem to fix.

    Hey guys! I'm stumped. I have a 2019 Ford Expedition Max with 87,000 miles. I live in Ewa Beach, HI and anytime I drive my vehicle to the north shore, about 25 miles my vehicle starts to misfire, run really rough, and sometimes stall. All I have to do is turn it off for a few minutes and the...
  5. B

    Cylinder 4 misfire plus EVAP System Monitor and Catalyst Monitor won't complete cycle

    I have two 1999s 5.4s. One I've had for over 20 years and the second one for about 5 years. They both have the exact same problem: 304 code (cylinder 4 misfire). The other clue is that the trip cycles won't complete for the catalyst monitor and the evap system monitor. Expy #1 is the one...
    • BrentDJ
    • Thread
    • 1999 catalyst cylinder4 evap expedition 1stgeneration misfire tripcycle
    • Replies: 10
    • Forum: 1st Gen - 1997 - 2002
  6. E

    2000 Expedition EB spitting 4 codes

    Hello, my Expedition is spitting 4 different codes. It is a 2000 Ford Expedition 2WD Eddie Bauer Edition, it has a 4.6 Triton with 270,000 miles. Check Engine Light came on with a code for a misfire in Cylinder 7, we replaced the Spark Plug, and it didn't fix the issue. We then replaced the...
  7. xJohnnyOx

    P0304, Misfire

    Hey all, Came back from an out of town ski trip this weekend and my 2000 Expedition EB Model (V8-5.4L) was running rough as I came back into town and it turned on the CEL. Felt like a bad cop (last time I had one go bad was about 5 years ago). Scanner showed code P0304 (lucky me, cyl 4...
  8. J

    Poor acceleration then died.

    Hey guys, New mystery, while driving home yesterday from hospital. Truck acted up with an acceleration problem. It would not even get up to 1 MPH floored it same issue. Pulled over the truck had no power (no lights nothing while at idle it made a click then died. Tried to crank it just clicked...
  9. F

    Cylinder 5 misfire

    Hi I'm new to this so please forgive any mistakes I might make but I just bought my second expedition it's a 1997 XLT 4.6 my first was a 2000 5.4 and the tranny started going out on that it was the 4r100 and it was cheaper to go buy a new expedition than to rebuild their replace the tranny so I...
  10. A

    Engine misfire

    My 03 Expedition 5.4 With 189K started misfiring a few months ago, it was running rough, the Service Engine light would flash and a ton of codes came on at once including 301 and 307 so I figured plugs and coils. I replaced all plugs and coils with Motorcraft brand and it ran great for a couple...
  11. H

    Help Identify! Broken Engine Part

    2007 EL with 370k miles. Took it in for the following reasons: transmission/engine (not sure which) shuttering in the 30-40mph range. There was also an occasional cylinder 1 misfire - compression fine and plug/coil pack no issue. Somewhat rough-ish idle, nothing extreme. Anyway, the mechanic...
  12. chrono

    2017 3.5L V6 - Misfires While Accelerating

    I got this truck 2 months ago with 50k miles on it. About 3k miles later, I started noticing misfires or "pinging" in two situations: (a) when accelerating at highway speeds, like while passing, and (b) when climbing hills. Eventually I had enough misfires to trigger a persistent Check Engine...
  13. D

    5.4L Engine Misfire, Piston Rings, Troubleshooting Q&A

    I have a 2007 Expedition 5.4L that has undergone some testing to confirm a misfire in cylinder #5. After a compression test result of “low”, we did a wet test and the compression increased, resulting in a possible piston ring replacement is needed. I am thinking about attempting this project...
  14. H

    Newer Spark Plug Heavily Corroded

    2007 Expedition EL 2WD with only 348K miles. Around 6,000 miles ago new spark plugs and coil packs were installed. Yesterday the idle and ride got very rough - bad shaking and significant loss of accelerating power. Check engine light started flashing and then solid. Went to Autozone for...
  15. Texas Dave

    COP (coil) mystery?

    In the past year I have had to replace the coil on cylinder 7 of my 5.4L 2007 Expedition three times. It begins with a stumble when accelerating which sets off a misfire on cylinder 7 code. I replace the coil and the engine runs great for a few months. I have also replaced the wiring connector...
  16. L

    Injector missing pulse

    Hi. I have misfire in cyl#1. I have changed plug, coil and even injector.. still misfire. My car (04 expidition 5.4) also drives on LPG. When LPG are ativated there are no misfires at all.. latest check I ran was with an noid-light.. that do not flash at cyl#1.. I have same voltage at #1 like...
  17. J

    Catalytic Converter Replacement

    After dealing with a ton of no-start, misfire, and excessive rich conditions, I believe my passenger side catalytic converter is done for. My 05 Expedition EB 5.4L 3V 4x4 takes some time to start. It cranks for a good 5 seconds when cold starting and has a rough idle in drive gears and...
    • Jake Oleszak
    • Thread
    • 5.4 catalytic converter cylinder 2 fuel hard start idle misfire motorcraft rough rough idle
    • Replies: 7
    • Forum: 2nd Gen - 2003 - 2006
  18. Matticus

    Multiple misfire after fill up - coincidence?

    2012 EL - my wife filled up the car at Costco and, within a few minutes/miles after driving away, the car start shaking like crazy. I drove out to see what was going on. Sounded and ran horrible. Initially, code showed a pending misfire on cylinder 3. I got it home and ran it a little more to...
  19. D

    Misfire on No.7

    Im getting to the stages where I’m going to start pulling my hair out about this misfire. From the top. I had a lean code, lean on both banks. Found some hoses off to the pcv so reconnected, believe the fault was sorted. Next up I got a bad misfire on number 7, first off I swapped out no.7...
  20. C

    cylinder 5 misfire

    Hello Ford lovers. I have a 2003 Ford Expedition 5.4 liter. I experienced a cylinder 5 misfire. first thing i did was change the coil pack due to it still being an older coil pack compared to the others and code. Truck still had rough idle and code never left. Next step, pulled coil pack and...
  21. Fudge1218

    Misfire with no code

    So 2003 expedition 4.6 rwd, its misfiring and I can feel it the service engine soon light came on but I was changing a few sensors so I disconnected battery not thinking and turned it back on and the code was gone, what's the best place to start troubleshooting and figuring out which cylinder is...

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