How can I test to see if I have a bad coil?

Asked by Nov 22, 2015 at 05:27 PM about the 2003 Ford Expedition XLT

Question type: Maintenance & Repair

2 Answers

40

Remove that specific ignition coil with the engine on and idling if your coil is working you will notice change such as a misfire and rough idle. If there is no change at all and is idling the same way regardless of the coil connected or not then your ignition coil is not working. Cheers

71,415

Ignition coils are tested by resistance, (Ω) readings. I do not know what all of them should be, but I do believe Auto Zone can check it for you.

Your Answer

Add photo

Related Questions

Search Ford Expedition Questions

Ford Expedition Experts

#1 T_S_T
T_S_T
Reputation 1,910
#2 Larry Sturgis
Larry Sturgis
Reputation 1,330
#3 lightGear
lightGear
Reputation 1,010
View All

Related Models For Sale

Used Chevrolet Tahoe
585 Great Deals out of 32,569 listings starting at $1,500
Used Ford Explorer
999 Great Deals out of 70,245 listings starting at $997
Used Chevrolet Suburban
263 Great Deals out of 19,837 listings starting at $1,800
Used Lincoln Navigator
99 Great Deals out of 5,836 listings starting at $1,900
Used Ford F-150
2,079 Great Deals out of 208,334 listings starting at $290
Used GMC Yukon
394 Great Deals out of 20,096 listings starting at $2,495
Used GMC Yukon XL
208 Great Deals out of 12,659 listings starting at $2,000
Used Cadillac Escalade
210 Great Deals out of 11,024 listings starting at $3,000
Used Nissan Armada
155 Great Deals out of 8,827 listings starting at $3,000
Used Toyota Sequoia
133 Great Deals out of 5,456 listings starting at $2,900
Used Ford Excursion
8 Great Deals out of 789 listings starting at $4,250
Used Dodge Durango
292 Great Deals out of 21,341 listings starting at $1,495
Used Ford F-250 Super Duty
325 Great Deals out of 46,185 listings starting at $599
Used Cadillac Escalade ESV
111 Great Deals out of 5,415 listings starting at $1,995

Used Cars For Sale

2017 Ford Expedition XLT For Sale
3 Great Deals out of 2,340 listings starting at $31,000
2016 Ford Expedition XLT For Sale
11 Great Deals out of 161 listings starting at $25,990
2015 Ford Expedition XLT For Sale
38 listings starting at $23,750
2014 Ford Expedition XLT For Sale
4 Great Deals out of 61 listings starting at $17,995

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.