2004 F150 5.4. All four Coil packs on right bank are dead. Left side ar all fine. Truck running on left side only, so therefore, not running much. Why 1 side only dead?

Asked by May 05, 2014 at 10:23 AM about the 2004 Ford F-150 XL 4WD

Question type: Maintenance & Repair

What would cause all four coil packs to be dead on a Ford F150 5.4 engine.  Left bank is good, truck starts and runs, very poorly, cannot be driven.

8 Answers

24,605

the Ford set-up is a little different in that the coils are supplied power all the time and the PCM provides Ground to fire them. It sounds like you have a wiring concern. The power circuit (Red/Light Green wire) supplies power down each bank of coils. It's the same feed and fuse so personally, I'd follow the loom back from the failed bank and see if there's physical damage to the wiring. A splice could have failed but it's more likely that the harness got damaged.

6 of 6 people found this helpful.

Thank you very much for your response. It does make sense. Now I have somewhere to start looking.

24,605

You're welcome. Let us know what you find!

did you figure this out. i have the same problem. ive used a test light on the wires and when key is turned off they are both ground and with engine running on the bank of cylinders that still works the dead side of the engine has positive voltage to both wires into the coils. as does the working side. both wires give green light in test light with key off . red light when engine is running

20

I got the same problem passenger side all 4 coils dead no power at all did you fine the Solution for your truck really need some help here

2 of 2 people found this helpful.

Has anybody figured the problem out yet

24,605

You'll have to do some actual work to find it. Please see my original post.

1 of 1 people found this helpful.
10

its the vct sensor its located in the front of the motor had the same problem one for the camshaft and one for the crankshaft depending what side is out is determaned by witch side is not firing its about $80 bucks and a 10 to 15 minute fix. Also watch for the other one to go out with in about 6 months after you replaced the other one

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

F-150

Looking for a Used F-150 in your area?

CarGurus has 207,340 nationwide F-150 listings starting at $1,499.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 8,210
#2 dandyoun
dandyoun
Reputation 4,390
#3 tennisshoes
tennisshoes
Reputation 2,860
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,772 Great Deals out of 181,204 listings starting at $250
Used GMC Sierra 1500
761 Great Deals out of 69,133 listings starting at $1,850
Used Dodge Ram 1500
412 Great Deals out of 10,832 listings starting at $1,400
Used Ford F-250 Super Duty
330 Great Deals out of 46,264 listings starting at $1,450
Used Toyota Tundra
438 Great Deals out of 34,679 listings starting at $2,990
Used Toyota Tacoma
473 Great Deals out of 41,593 listings starting at $1,995
Used Ford Mustang
537 Great Deals out of 45,845 listings starting at $1,999
Used Nissan Titan
178 Great Deals out of 19,080 listings starting at $3,000
Used Chevrolet Colorado
240 Great Deals out of 24,818 listings starting at $2,499
Used Chevrolet Tahoe
557 Great Deals out of 31,373 listings starting at $1,500
Used Ford Explorer
928 Great Deals out of 70,256 listings starting at $997
Used Ford Ranger
176 Great Deals out of 5,676 listings starting at $950
Used Ford F-350 Super Duty
373 Great Deals out of 25,770 listings starting at $1,995

Used Cars For Sale

2017 Ford F-150 XL 4WD For Sale
1,147 listings starting at $22,435
2016 Ford F-150 XL 4WD For Sale
136 listings starting at $21,600
2015 Ford F-150 XL 4WD For Sale
6 listings starting at $23,800
2014 Ford F-150 XL 4WD For Sale
3 Great Deals out of 14 listings starting at $12,993

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.