Recently i replaced all my plugs with autolite platinums because my truck had a horrible misfire. After that, it ran like new except for when you would smash it from a dead stop. Now less than a week later the misfire is starting to come back(no CEL's yet). It's not as bad, but I feel it comming. Whats goin on here guys? Is my driving style causing the misfire, or am I just Mr. Lucky. Its a '99 4.6L V8 btw. Thanks.

 

are the wires and ignition coils ok?

 

That's step #2, is there any way I can test the wires/coils?