There are two strange sounds coming from my 2003 Ford V6 Mustang.
One is a medium clicking sound that goes away every now and then and is not as loud as before my last oil change (with marvel mystery oil added to it). I figure its the hydraulic valve lifters, but just in case its not, does anyone have any ideas as to what else it could be?
The smaller clicking sound gets much louder as the RPMs go higher, and at idle the car drops RPMs to around 500 and shoots quickly back up to 1000. Also, this sound is accompanied by another strange clicking sound that is louder than the first but goes off at a seemingly faster rate and makes the engine sound like a helicopter.
Could this just be a dirty throttle body?
What else could that be?