Hi all, been awhile. It's cold as hell here in Co, and thats when things go bad. The Ex has been running a little rough for the past week or so, then the other day it died at a light. Now it starts ok runs a little rough, then dies as soon as I put it in gear. I've replaced the IAC, cleaned the MAF, and replaced the fuel filter. The codes that I get are HEGO$01, HEGO$03, MISFIRE$50/53/54/55/56.
Gonna check the boots and plugs tomorrow, any thoughts on the HEGO's?

 

How many miles? What motor?

 

V10 @ 180,000

 

If you don't know the history, I would just go ahead and replace the coils, plugs, and boots. Use Denso coils and Motorcraft plugs... about $275 for everything from Rock Auto and a few great how-tos on this forum.

I would also go to Autozone and get a fuel pressure gauge and check your pressure off the rail. The pump might be on its way out. A new Motorcraft pump installed is $500-$700, or if you want to do it yourself, there are some great how-tos on the forum.

Not sure on your codes... HEGO... what the heck is that? Usually OBD2 codes are P0****... what did you use to pull your codes?