Whodda thunk it would take 4 trips to the dealer to fix an issue that existed before I bought the truck that I asked them to fix it before I bought it, and I had to pay them to fix it? But, that's what it took for them to finally replace the spark plugs. Found a TSB and a YouTube video of the exact symptoms I had. This time I mad sure to force the engine into logging a code instead of driving easy when it went into limp mode. Soon as the code logged, I babied it till i got it to them. No idea why it took them this long to find it, but it's finally done. Truck runs like it should now, which is to say, very well.

Had I thought to fix this myself, I would have saved time, money and some headaches. And I should have not bought it when I *knew* something was wrong with ignition without them fixing it first. It sounded like plugs to me when I test drove it.

Here's a video explaining the fouling problems on the OEM spark plugs


Stephen

 

Glad it's fixed for you. Can't see how the Air-to-Air cooler could be the problem except of course the water getting in the intake. Hell, instead of blocking the cooler off, just eliminate it and install a tube.

100,000 miles is way too many on a set of plugs.