ok i need help last month my ford f150 4.6 sohc started misfiring. pulled the codes cylinder 7 misfire. so i changed the plugs. used motorcraft. it stoped for a day and came back. as a cylinder 8 and random misfire. so i changed the injectors used bosh gen 3 not the exact injectors for the truck but i dont think there hurting it think there for a mustang bullet with same motor 4.6 sohc. i gotta deal on them. so i put them in. still the misfire. the next day i start the truck and no misfire runs great better than when i first got it. oh yeah also changed the fuel filter with the injectors. so im driving to work in thr rain and pull up to a co workers house put it in park and it starts missing.:c ensored: drive to work and back. on the way back it gets worse. go home pull codes 7 and 8 misfire. used old plug to check the wires 7 and 8 both got spark going to run compression check tomorrow. buddys dad thinks could be bad valve springs i dont have the money for all that. gotta baby in the oven does any body know what could cause this problem i need help. oh yeah the truck has 200,000 miles on it thanks

 

To start did you change your coils on 7&8 when you changed plugs?

 

Yeah, I would have went with the coil first.

 

i know I am new, but when my engine went it was the cylinders, they were cracked

 

This problem ever get resolved?




Exrangerowner