i have a 96 blazer 4x4...it sounds like a wierd grinding noise comming form the dash. when i apply the gas it seems to go away..but at idle or when i remove my foot form the peddle..it returns....soooo annoying its driving me crazy..can anyone help me with this PLEASE...what the hell is it and has anyone had the same problem

 

believe it or not it is most likely your pcv valve that is causeing this noise. i had the same issue and it bugged me forever.... go under the hood with the engine running and reach down to the pcv valve and feel it, it is probably vibrating like mad... replace for 3 bucks and i bet the noise goes away.

 

wow ill try that thanks for the advice...ill let you know haow it works out...thanks again

 

I have the exact same annoying issue. I was very sceptical about the pcv valve fixing the issue, but for 2.99, I gave it a try. As I suspected, after my new pcv install, the noise is still there. Has anyone come across a fix for this issue?

 

It isn't so much the valve itself, but the vacuum line from the PCV valve resting on the cruise and/or throttle cables. If you just replaced the valve and didn't check for clearance along the length of the PCV vacuum line, you didn't address the issue.

 

Thanks. I checked mine. It was unplugged from thevalve cover and I rerouted the vacuum tube also. Hopefully that cures it.