My truck has ran like **** for 2 months now. Dont know if its b/c i move it once a week or not. Sounds similar to your problem but Im not gettin a code. Is the Evo blockin the codes? It doesnt have any stored in it last i checked. Mine will crank fine and run smooth but about 4 mins into my drive it will run like crap at 50-65 and lasts a few mins. Once it has warmed up and ran a while it runs like a scalded dawg. Its startin to do this more often than it did 2 months ago so i need to get it fixed.
Im glad someone else thinks what I do... DOC, I told him this earlier today and have been saying the same thing ALL day. I believe its either a bad coil or wiring.
Hopefully so..... If its simple ima change all cops and plugs , but if its got a blowed head gasket im not fixin it
Someone asked me tonight to put timing chains in there ford... They didnt like the price I gave them for labor.. I told them to go to ford and pay 4x the price...
I told him 500 labor plus parts. He looked at me like I was stupid. Sorry buddy, but Im not working on shat if the money aint right.