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?

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.

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

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

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

Has anybody figured the problem out yet

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

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

can be a camshaft out timing ?

Recently ran into the same problem. Driver side bank dead. Anyone successful in finding the problem. I'd appreciate it. Thanks.

I would check for a damaged wiring harness.

VCT solenoid, 70 bucks, i lost all 4 cylinders on the drivers side, was throwing 23 different codes, seen the post up there about the VCT, runs perfect now.

I don't have an answer very sorry to say however you guys all refer to the VCT solenoid which makes perfect sense if my vehicle had the 3 valve Triton this is the only forum I can find that comes close to what I'm going through it appears that half of my truck is running the other half seems to be dead passenger side Bank however it's 2 valve it's not a 3 valve I don't have the phasers or the VCT solenoids still need a response from anybody that could lead me towards the right lead I replaced a lot of sensors I rebuilt the engine from the ground up everything seems to be running perfect high RPMs it seems that the skip goes away even my computer doesn't seem to pick up mode 6 data as far as where the misfires coming from I have brand new injectors brand new cop and brand new Motorcraft plugs I'm not quite sure what I'm missing wiring also appears good

I also felt it was important to mention I apologize I have a 2001 Ford F-150 XLT 4 by 4 with a 5.4 L 2 valve Triton engine I took a block from a 1999 rebuilt mine with King Barons carpartswiz supplied the cylinder kits I replace the IAC the CHT the TPS look through the wiring on the PCM ran a lot of Ford programming on it just to try to come up with what was going on I even had to put a brand new intake manifold on it and all new fluids and brand new filter it just appears the passenger side head is failing I'm getting ready to run a compression test I'm all opinion praying that there's no issue there but nothing seems to be leaking or burning out I'm just dumping raw Fuel and I've got brand new injectors it seems electrical but I can't seem to pinpoint it

I would recheck your valve timing.

On my 2006 Ford F150, One out of the four signal lights is not working. I have changed the bulb and the unit that hold the bulb. What are other possibilities that could be causing blinkers not to work?

FRONT ENGINE MOTOR COIL PACK GROUND Ford old part number F^AF- 18801-AA is dead.

This thread led me to replace the vct sylonids on my 2006 expedition same issue internment fire on 5 6 7 8 ... Ford said mother was trash .... replaced sylonids today running good for the beast it is no codes

is any one know why my cylinder 8 has not signal on the injector possible causes

i replace the computer and re program and still the same problem'

have same problem. tried everything everyone said still no fix. comes to find out cam phase wheel. that cam sensior send. magnetic data to is wore out. so has be replaced. after doing future reshearch. 5.4 triton are common for that

I have a 2004 F150. Looking at the motor Driverside, all 4 cylinders aren't firing? Replaced coils, plugs, VCT. Can anyone please help? I have power to the coils. This is not even believable!

I have a 2004 ford expedition with the 5.4 Triton motor with 244,000 on it last Monday it was running fine coming home from work started losing power was able to read the codes and it said misfire one and 2 so when a replace coil on the two an plugs also changed 2 injectors fuel filter and intake still having issues driver side is running hotter than passengers side vehicle wont get a overdraft 10 or 15 on flat land its running rough and to rich also the raw fuel smell is building up in the vehicle anyone know how to help

Another of your problems

And last but not least. These thre items right here I just posted a major contributors to all the problems I am hearing here about the f150 cylinder misfires. Take this to the bank.. I had same problem until I checked these guys out

This is one of your problems with your misfires

If you replace the camshaft phasers you might as well go ahead and replace the time in chain tensioner while you’re in there

Would anyone have an idea why a 2002 F150 4.6 keep blowing the number 6 coil under load? Coils and plug has been changed with OEM equipment multiple times. When the coil blows it shorts out the main fuse and shuts the truck down. It blows the tops right off the coils.

https://circuitboardmedics.com/2004-2008- ford-f150-pcm-repair/

Ok, my 2005 F250 5.4l did the same thing with the entire drivers side going out. For me it turned out to be the Cam Phaser sprocket on the camshaft. It would not retard as it should....the cps sensor would read that and then kill the spark to the affected cyclinders. I really hope that your problem is much simpler than mine was...