I have a 2002 expedition, all spark plugs were replaced 2 weeks ago,engine light came on again #5 has oil on it and also on the coil.Anyone know what it could be?

Asked by Veronica Oct 24, 2015 at 05:13 PM about the 2002 Ford Expedition XLT

Question type: General

1 Answer

30,935

If the plug had oil on the electrode chances are you have lost compression in that cylinder or you may have a bad valve seal. Do a compression check to ensure all cylinders are within 15-20lbs of each other ... low compression can be valves or piston rings ... if compression is OK then oil may be coming from a bad seal ... the oil will foul the plug and it won't fire

Your Answer:

CarGurus Experts

  • #1
    Larry Sturgis
    Reputation
    5,300
  • #2
    T_S_T
    Reputation
    4,560
  • #3
    Gene Arnett
    Reputation
    2,730
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Tahoe
20 Great Deals out of 927 listings starting at $11,900
Used Chevrolet Suburban
9 Great Deals out of 561 listings starting at $7,500
Used GMC Yukon
11 Great Deals out of 952 listings starting at $1,225
Used Lincoln Navigator
7 Great Deals out of 173 listings starting at $9,869
Used Ford Explorer
73 Great Deals out of 2,156 listings starting at $2,999
Used Ford F-150
338 Great Deals out of 15,311 listings starting at $1,712
Used GMC Yukon XL
12 Great Deals out of 677 listings starting at $13,950
Used Toyota Sequoia
3 Great Deals out of 71 listings starting at $16,489
Used Cadillac Escalade
30 Great Deals out of 368 listings starting at $6,900
Used Ford F-250 Super Duty
24 Great Deals out of 1,210 listings starting at $7,995
Used Toyota 4Runner
10 Great Deals out of 299 listings starting at $12,888
Used Chevrolet Silverado 1500
202 Great Deals out of 5,916 listings starting at $2,975
Used Ford Excursion
2 listings

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.