[lance2020]

i have been having a problem with my valves raising hell when ever i put a load on the moter (pulling something or going up a hill)and it is about to drive me crazy can some tell me where to start looking for the problem. 95 bronco 5.0:shrug

 

[ValkariaKid]

It's probably pre-detonation, or lousy gas.

Fill up at a different station for the next tankful, and see if that makes a difference. If not check your timing.. it's probably too far advanced so back it off until the pinging stops.

 

[lance2020]

ive checked timeing,tried filling up at different stations run high test,injection cleaner.nothing seems to help

 

[jermil01]

Have you pulled and checked the plugs?? Check your plug wires as well, make sure everything is seated properly.