I have a 99 Ford Expedition that started running rough, checked the codes because it is showing check engine soon light, shows code for spark plug 4, took wire off put back on and erased the code

20

Asked by Aug 29, 2015 at 04:51 PM about the Ford Expedition

Question type: Maintenance & Repair

my Ford Expedition is running rough, have replaced fuel filter, air filter, changed the oil. After running a scan it is showing with a P0304 code and when I looked that up it said misfire on number 4. I am fairly broke right now until payday next week and need to make an approximate 200 mile rt trek on Monday. Should I start with just one spark plug to see if that cures the problem? I cant really afford to buy all 8

4 Answers

5,725

You have done the troubleshooting, now replace the plug(s), Caution... if this is the 5.4 engine, the plugs are a bi..h. search YouTube for ford 5.4 replace sparkplugs and pay attention.

20

lol thank you oldtimer37, its a 4.6 but I am getting someone to replace the plug for me, don't have the tools and right now cant afford to buy them. Thank you so much for the response, I am so thankful to have found this site, you and another person have been so helpful. Made me feel better that it isn't something serious

55,285

The problem is likely one of the following...spark plug, spark plug boot, coil on plug or a fuel injector. How many miles on this vehicle and how many miles since the plugs were changed?

20

Bob, about 8 months ago, however, it ran just fine until I got gas at a place that apparently is noted for watering down their gas. Didnt know they watered it down as I had just moved here. Think I will start with the sparkplug and see how it goes from there. I have tried changing out the fuel filter, checked the air filter, changed the oil and when running the codes it came out as the 4th sparkplug misfire

Your Answer

Expedition

Looking for a Used Expedition in your area?

CarGurus has 17,299 nationwide Expedition listings starting at $1,500.

ZIP:

Ford Expedition Experts

  • #1
    T_S_T
    Reputation
    2,100
  • #2
    Larry Sturgis
    Reputation
    1,490
  • #3
    lightGear
    Reputation
    1,040
View All

Related Models For Sale

Used Chevrolet Tahoe
807 Great Deals out of 42,074 listings starting at $1,987
Used Ford Explorer
1,245 Great Deals out of 69,554 listings starting at $1,000
Used Chevrolet Suburban
488 Great Deals out of 24,242 listings starting at $1,799
Used Ford F-150
3,335 Great Deals out of 221,765 listings starting at $1,200
Used Lincoln Navigator
82 Great Deals out of 3,755 listings starting at $1,795
Used GMC Yukon
610 Great Deals out of 20,728 listings starting at $2,500
Used GMC Yukon XL
268 Great Deals out of 14,431 listings starting at $1,950
Used Cadillac Escalade
288 Great Deals out of 11,900 listings starting at $1,200
Used Nissan Armada
162 Great Deals out of 9,901 listings starting at $2,995
Used Toyota Sequoia
127 Great Deals out of 5,152 listings starting at $1,500
Used Ford Excursion
11 Great Deals out of 830 listings starting at $2,995
Used Dodge Durango
372 Great Deals out of 24,221 listings starting at $1,500
Used Ford F-250 Super Duty
405 Great Deals out of 49,117 listings starting at $1,899
Used Toyota 4Runner
337 Great Deals out of 26,793 listings starting at $1,800
Used Jeep Grand Cherokee
1,077 Great Deals out of 72,500 listings starting at $1,195

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.