Aktech

Fix your egr first. I like to fix all the codes before moving on. I would test it before spending 120 on it,looks like it was already replaced. Spraying the lines is a **** poor way to look for leaks. Just pull engine vac.

adam3797

checked codes putting the piece of wire on the 3rd line on the eec test port and that other line by its self on the eec test area. i have a code reader but it wont read this truck for some reason... tried KOEO and KOER

Aktech

https://www.f150forum.com/f10/how-re...es-obdi-10907/

If no codes come up most of the time u got a bad computer. You should at least get code 111. How did u get code 334? Did u fix the egr problem? Did u fix the vss problem? Did you pull engine vac at idle? What are the color of all the spark plugs? Pull the dip stick and smell the oil. Does it smell like gas? And looks runny?

Aktech

https://www.f150forum.com/f10/how-re...es-obdi-10907/

If no codes come up most of the time u got a bad computer. You should at least get code 111. How did u get code 334? Did u fix the egr problem? Did u fix the vss problem? Did you pull engine vac at idle? What are the color of all the spark plugs? Pull the dip stick and smell the oil. Does it smell like gas? And looks runny?

adam3797

i did the the test with a piece of wire(seen on youtube) where you receive codes by checking how many times the check engine light blinks. KOEO and none on KOER replaced egr and sensor so idk. vss is unplugged and truck is running with no speedo or abs because of that. new plugs rotor cap wires and all that. not sure on color. havent pulled vac yet. good new oil change.