ok once in a while a clicking noise is coming from the top of motor either the top of the vortec intake manifold is gonna go out or is ignition related.cuz everytime it is clicking i hit the gas and the noise gets louder..gonna change the spark plugs they are due 4 change..would appreciate any help thanx

 

hi there i have a 95 blazer 2dr 4x4 vortec and i was wondering if your thermostat is good cause mine went and made a click noise almost all the time until i took it out that and it had an arc on the spark plug to the block so start it when its night time and see if you see light