Would there be any reason that one of my spark plugs on a 2.8 would be coming loose from vibration. it did it with the orginal set that was on the car when i bought it and now its doining it wit the new ones i just put on

 

Are you losing compression in that cylinder?

Are you using spark plugs with washers?

Are you properly torquing them?

 

Are you torquing them correctly?

Are they supposed to use the gasket?

 

i know i been torquing them right. see i don't know if they need washer i bought it used so it could orginaly had it and the last owner just never put them on but i don't know ?????????????????????

 

You buy the car used or plugs used, if you bought the plugs used that would be the most retarded thing i've heard in a while. The plugs should have a washer that cant be removed, at least all the plugs i've instaled were like that.