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iTrader: (1)

don't keep driving the truck with the light flashing, unless you want the cats to melt down and cause more issues. and there is much more than can cause a misfire than just junk around the plug

white89gt

Yes, the flashing is telling you that you are damaging the converters if you drive it. Park it until you can fix it, or you'll pay the price.

Jbrew

You have a low grade misfire. The light flashes once the monitors misfire count exceeds limits, then it goes out. Low grade misfires occur under specific load, usually around 45 mph under normal acceleration.

I'm not sure where you've been searching, but these coils don't go out like that unless you foolishly washed your engine. They go out this way when a coil has too many shorted turns in the winding's, this occurs slowly, with age and under normal circumstances. The possibility for #2 to go out due to water intrusion is even less unlikely since it's close to the front of the engine.

It's age, you at the mileage when they begin failing like domino's. You can replace just #2 and go for a bit longer, but you'll end up with same problem with another cylinder before too long. You need to invest in a full coil swap at this point to get your ignition integrity back. Motorcraft or Denso coils only, DO NOT use any other name brand or you'll be right back in the same boat. Motorcraft or Denso will steer you clear of ignition problems for many many many years to come, just make absolutely sure only use those with Motorcraft plugs.

Try Ebay first, every once in awhile you can find deals on Motorcraft sets, Rock Auto for Denso.

You can drive the vehicle IF necessary with a low grade miss without repercussions. BUT, if the coil fails completely and you get full CEL illumination, or IF the CEL is continuously blinking, your going to have to disconnect #2 injector to keep from cooking your cats.

YTG13

This is my only vehicle so I have to drive it. Thanks for all the info. I'll see if I can clean up the garage and pull it in out of the 39 degree weather. Nothing like working with cold metal!

Jbrew

No problem, I'd order the parts first, replace #2 for now. That will get them all firing. It's an easy one....10 -15 minutes. Finish the rest when it's warmer. Post back when you get the coil, will make it even easier lol.