Been gone awhile and having problems
well i havent been active at all for some time now and im having some some problems out of my 4.0 ohv so i thought i would get some help here. well i bought and upper gasket kit and had a buddys dad put them on, well i drove the truck for about a week after he does it and all the sudden my motor RUNS LIKE CRAP. miss firing like freaking crazy. well some guy checked it over with a snap on scanner and he found i that there was a cylinder 4 misfire. well we narrowed it down to it being the injector so he replaced that today. it just so happens it runs better but still horible. i unpluged the egr valve and i thought it was running better but still bad. im lost on this on. its driving me crazy. i just dont know what to do with out possibly wasting money. any ideas?
have lean codes for banks 1 and 2 btw.
help and info is greatly appriciated
98 4.0 auto 2wheel drive.
5 inches of lift
33 12.50 BFG Mud Terrains on craiger 15x10 soft 8s