New goodies, now bad idle
I have a 1993 E-150, 351w. But in a comp cam, #35-349-8 eldebrock heads #60379, hyd roller lifters, roller tip rockers new timing set, stock EFI, MSD coil, cap and rotor. New 2.5" duals w/ H-pipe, resonators and Flomaster 40 series mufflers. It ran fine before all the mods. Just wanted to get some extra power for hauling 5 kids, boat or camper. Not a daily driver, but my main vehicle (wife has a honda pilot for around town stuff).
Now when it's cold, runs fine. When it warms up, in park, the idle fluctuates, same in gear, just more so. If I give it just a small amount of throttle, all is good, WOT it goes like a bat out of H***. Timing is at 10 BTDC as per the ford spec. I haven't messed with the timing yet, wanted to get input from some of you guys. Do I need a performance tune done to my ECU, or are there adjustments that need to be done? Any and all help is much appreciated!!!!