i have a ford ranger xlt 1989 4x4. v6 4.0 engine. after the truck was all warmed up there was a clicking after i moved the truck a little bit. im not sure were it exactly is. about every like 5-10 or 20 seconds you would here a loud click. it would just be one click then about like i said 5-10 or 20seonds and then you would here another loud click.
it sounds like it is coming from behind were the radio is. in the engine compartment.
any hints on why it is doing that?

 

found out what it was was the smog controller