Hi everybody,

A couple of weeks ago i had a missfire cylinder#8.

I changed the coil #8 and the spark plugs today.

When i started the engine,it was worst than before!!!!!!!!

I checked the OBD and it says "missfire cylinder #2,#4,#6,#8"!!!!!!!!

I drove a little bit and when i was at round 50 miles in 4th gear it seems like all the truck would collapse!!!!!
Everything was shacking,i couldn't drive anymore!!!!!!!

I really need your help,nobody can fix a F150 in FRANCE!!!!!

Sorry for my bad ENGLISH..

BAST.

 

your speaking better english than half the people do on this site. what brand plugs did you use? and did you use dielectric grease?

 

i'd say its something electrical because its missing on every otrher cylinder.

 

I ordered MOTORCRAFT coil and spark plugs direct fromthe US.

I did use grease on the tread of the spark plugs.

How can i check the coils.Is there any resistance in it that i could check?

Computer says tat something is wrong but i don't know how to fix it?

BAST.

 

dont put the grease on the threads. you need it in the spark plug boots.

 

About the coil,when i screw them over the spark plug,it's very "soft".

How can i be sure that there is a good contact on the spark plug?

 

the spring inside the boot makes contact with the spark plug. its connected to the coil. one cop wouldnt cause a missfire for 4 cylinders.

 

OOOhhh cool i see that you understood me!!!

Sometimes it's hard to explain what i mean in ENGLISH!!!!!!

It's easier in FENCH!!!!!

Yes i agree that 1 coi lcan not cause a missfire on 4 cylinders.

I guess i have no other choice that let a US CARS specialist check my problem but i t would cost me a lot of money here in FRANCE.!!!!!!