i have a 1999 F150 4.6 that had a code #4 clynder misfire so i pulled the plug and it had coolant all over it i checked the hoses and reclamped them incase of leak then changed the plugs and wires it seemed as tho it fixed the problem but its back to spuddering but not as bad... around 3000rpm i can feel the miss badly i checked the plug and hoses no coolant has any one ever had this problem or would know what is up with it