Popcorn in engine compartment?
Soo, my newest problem is a sound in my engine compartment when driving, it sounds like a sort of 'popping' sound in my drivers side engine compartment, like kernels of corn popping. Of course it only happens when I'm driving, so I can't check under the hood to hone in on it (unless I wanna do some stunt work). Latest change to the motor was spark plug change about 1500 miles ago. Any ideas? Could a plug be loose? Also getting a little engine knocking at idle, is that normal? Muchos gracias....