why would a ford explorer run rough after unhitching the battery and the service engine soon light come on?

Asked by ervine May 03, 2014 at 05:08 PM about the 2004 Ford Explorer XLT V6 4WD

Question type: Maintenance & Repair

i have a 2004 ford explorer 4.0 and i went to start it and it wouldn't start. so i changed the
fuel filter and unplugged the battery; then i plugged the battery back in; and it wouldn't
start. i finally got it to start; but it's running rough. the only way i can get it to idle is by
holding down the gas pedal. or it will just die. after i unhitched the battery and plugged it
back in; the service engine soon light came on. can anyone please tell me why this is.

2 Answers

226,805

You reset the ECM back to factory settings, so now you need to run a relearn on the system, that usually takes about 20 minutes drive time, if the check engine light doesn't go out during that time then something needs attention. With newer vehicles you just don't disconnect the battery without using a code retention device or you might windup with an undriveable vehicle.

1 people found this helpful.
44,195

Have you retrieved the codes to see what the computer has to say? It's possible that you may have unplugged something by accident. A quick code check will tell you which system to check. Simply disconnecting and reconnecting the Battery will not disable the vehicle. While it is true that the system will have to re-learn the engine and may idle funny for a while, that won't prevent you from driving it. Check the DTC's and see what cha got.

1 people found this helpful.

Your Answer:

Ford Explorer Experts

  • #1
    OJ
    Reputation
    22,800
  • #2
    TransAm77
    Reputation
    5,800
  • #3
    G A Arne
    Reputation
    5,360
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford Expedition
15 Great Deals out of 545 listings starting at $3,429
Used Ford F-150
162 Great Deals out of 11,741 listings starting at $2,450
Used Jeep Grand Cherokee
102 Great Deals out of 4,083 listings starting at $609
Used Chevrolet Tahoe
17 Great Deals out of 545 listings starting at $6,999
Used Dodge Durango
37 Great Deals out of 881 listings starting at $5,900
Used Toyota Highlander
53 Great Deals out of 1,953 listings starting at $3,995
Used Toyota 4Runner
27 Great Deals out of 1,233 listings starting at $6,888
Used Ford Escape
131 Great Deals out of 5,573 listings starting at $1,995
Used Honda Pilot
40 Great Deals out of 1,322 listings starting at $3,799
Used GMC Yukon
20 Great Deals out of 844 listings starting at $6,500
Used Nissan Pathfinder
33 Great Deals out of 1,421 listings starting at $121
Used Chevrolet Silverado 1500
109 Great Deals out of 7,672 listings starting at $4,985

Used Cars for Sale

2020 Ford Explorer For Sale
1,665 listings starting at $40,495
2019 Ford Explorer For Sale
4 Great Deals out of 77 listings starting at $32,495
2018 Ford Explorer For Sale
11 Great Deals out of 167 listings starting at $24,995
2017 Ford Explorer For Sale
8 Great Deals out of 313 listings starting at $14,950
2016 Ford Explorer For Sale
5 Great Deals out of 164 listings starting at $10,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.