Hey guys, need some help, got a 02 with a 5.4 and it just went to missing and has a loud knock, tick in the timing chain area. any ideas? just got the truck for my son and a week later this happens. Thanks for your help.

 

does it do this warm or cold? hopefully its a exhaust leak or blown spark plug.

does it seem to run Ok otherwise?

 

As soon as you crank it and it was fine the other day... No noise at all... Missing too didn't let it run long enough to get warm.

 

any codes tripped?

 

Check for loose spark plugs first. If all is good there, a cam follower may have fell off. You will have to remove the valvecover to check this.