At 40 - 50 mph. My f-150 Larrit. 4.6. Starts to jerk .........sputter. The rpms stay the same. So I'm leaning towards spark plugs or coil pack any chance of trams problems ?

Asked by Aug 04, 2014 at 03:16 PM about the 2003 Ford F-150 Lariat Crew Cab SB

Question type: Maintenance & Repair

Any chance of any problems in transmission

2 Answers

31,265

Sounds like a good tune up along with a air filter.

This is a common issue with the Ford 4.6L . The problem is most likely the spark plugs and COP coils. I purchased the Accel COP coils from Summit Racing. I bought an 8 pack of the Accel coils from Summit for $170.00 and they work great! Most other vendors wanted around $400.00 for the same thing. When installing, be sure to use anti-seize on the spark plug threads, and a dab of dielectric grease inside the spark plug boots.

Your Answer

Add photo

Related Questions

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 6,290
#2 dandyoun
dandyoun
Reputation 3,970
#3 tennisshoes
tennisshoes
Reputation 2,370
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,478 Great Deals out of 145,721 listings starting at $1,800
Used GMC Sierra 1500
1,084 Great Deals out of 56,547 listings starting at $1,600
Used Dodge Ram 1500
485 Great Deals out of 11,746 listings starting at $1,795
Used Ford F-250 Super Duty
451 Great Deals out of 41,607 listings starting at $2,850
Used Toyota Tundra
624 Great Deals out of 27,414 listings starting at $1,599
Used Toyota Tacoma
712 Great Deals out of 32,032 listings starting at $2,995
Used Ford Mustang
639 Great Deals out of 36,930 listings starting at $2,800
Used Nissan Titan
208 Great Deals out of 14,140 listings starting at $4,299
Used Ford Explorer
1,349 Great Deals out of 70,733 listings starting at $985
Used Ford Ranger
186 Great Deals out of 6,243 listings starting at $1,595
Used Chevrolet Tahoe
997 Great Deals out of 30,889 listings starting at $1,495
Used Chevrolet Colorado
297 Great Deals out of 16,518 listings starting at $2,195
Used Chevrolet Silverado 2500HD
405 Great Deals out of 28,244 listings starting at $2,900

Used Cars For Sale

2017 Ford F-150 For Sale
36,919 listings starting at $17,605
2016 Ford F-150 For Sale
211 Great Deals out of 97,577 listings starting at $17,892
2015 Ford F-150 For Sale
261 Great Deals out of 8,203 listings starting at $18,891
2014 Ford F-150 For Sale
529 Great Deals out of 11,114 listings starting at $9,900
2013 Ford F-150 For Sale
766 Great Deals out of 14,458 listings starting at $7,527