P0351 code and misfire fixed 2003 5.4l F150

[@jimmysmall330]

You said 15 and 20 ohms. I've watched 20 videos some 5to6, 30to40, 5000to7000 where are you guys getting your radio signals????

[@adamsautorepairLLC]

I checked all coils and they were all close in readings except one. The one was the bad coil. So I went with the others as a good reading.

[@maniacalmonster2293]

So what is actually causing this & how to fix??? Now what if you have a Coil RAIL on a 4.0 inline 6 engine with the EXACT same problem? This damn code will be the death of me! 😞

[@adamsautorepairLLC]

A bad coil was the culprit. Pull the spark plug for cylinder #1 the code is for cylinder #1. If the plug is covered in fuel it is not firing properly.

[@maniacalmonster2293]

@@adamsautorepairLLC Brand new OEM spark plugs gapped to spec. 👌🏼 On my 3rd Brand new Rail Coil. Open entire wire harness. Haven't seen a short to ground or an open. Been searching for days. All my wires look new & pristine. To the last of my knowledge the resistance in the rail is in range & the wires on harness connecting rail and to PCM. All fuses & Relays check out. I even have a test light, an Amp Hound, OEM Circuit tester & a Multimeter. 🤷🏼‍♂️ There's always something wrong after another after another.. 😞

[@Rickteg]

@@maniacalmonster2293 you need a scope and and an amp clamp to connect to cylinder 2 to get a known good reading you are going to look for a spike in power on this and if you find a spike in power on 1 then you need a computer the noid lights are good to see if signal is good but does not check for high voltage spikes that keeps killing the coil due to the computer 1 driver is not sending correctly but it is sending