So Wife did this nice "How-To" for the site and then we celebrated with a trip to Steak N' Shake. Halfway there I could feel it running a little off so I pulled up the app on the phone and connected it. I pulled up the codes and this is what I got:






So am I looking at an O2 sensor you think? It's shifting early and chugging a little as well. When driving it sounds a little like I have dual exhaust or a flowmaster. When sitting still at a light there is a small bump like bass turned WAY low coming from the exhaust as well. I turned around halfway there and went home and we took the wife's Highlander

 

That display is pretty much worthless in diagnosing whatever might be going on. All it shows is that several tests are incomplete.

 

That's what I thought, but it wouldn't ever do more than that. What do I need to do to get the full correct info?

 

A proper scan tool would help . Even a cheep Launch tool would work . I own a few , Snap on , OTC , Launch ...

 

Assuming that's touch screen, I'm phone illiterate. What does it say when you touch "read codes" ?

IIRC, you don't have an O2 sensor after the CAT, so it will never show ready for that test, normal.

 

Have you pulled the codes?

 

That was from me pulling the codes. I'll go out and pull them again in just a few. I have a scanner in storage 2 hours from here, I just need to get to it.

 

So the P0305 seems like a bad plug or COP on cyl. 5. Well damn.

 

At least you know where to look.

 

Sure do I paid a shop change the plugs a few months back, do I have any grounds to take it back to them if the COPS are all good or should I just say to heck with it and re-do it myself? I don't have Motorcraft plugs in it at the moment, the shop installed some "Super cool platinum" plugs and of course charged me more. The shop is a total ripoff but I didn't have a choice at the time. To be completely honest I don't believe he changed all the plugs, but I have no cause to think that other than he was shady. Is there a how-to on changing the plugs? It seems like a pretty daunting task honestly

 

Our gal Christina has a write-up in her usual style. https://www.ford-trucks.com/forums/1...l#post12447503

Assuming it's about the same on a 5.4 except 2 fewer cylinders.

Could be a poorly seated cop boot or water in the plug hole. (free to fix) Might want to try swapping it to another cylinder to verify it is the COP gone bad.

 

Nah, it's not that bad. Be glad you don't have a Lightning with the 5.4 modular.

It's far from the easiest plug job, but it's not too much of a headache. Just remove the coil plug screw hold down, unplug the coil, remove the coil, insert plug socket on an extension and remove the plug.

Stewart

 

Looks like #5 is the driver side front... whew! I've done COP before, dozens but none on this motor. The engine bay is up high, there isn't much room to work (Lots of stuff in there) and it's all nice and neat. In my mini-truck days I was mostly playing with early 80s trucks and there wasn't much to get in the way. My datsun I could and did the plugs once every other week due to it running rich... I could do all 4 in under a minute

 

With a supercharger on top of the engine, doing plugs on my Lightning is a bit of a pain. To make it easier, I bought a set of these KD Tools back in '05.



Plug sockets are permanently attached to three different size swivel extensions. The huge benefit of these plug sockets is the magnet that holds the spark plug. It's not a rubber bushing that holds the plug in the socket. The magnet makes for a better feel (touch) making sure the plug starts threading properly.

Stewart

 

I love those! That seems like a way better deal than the rubber inserts Plus the socket getting stuck in the head is always fun lol. Where do I need to be looking for a new COP? Would Ford be my best bet or is there a better way to go?