2004 Mustang Cobra Serpentine Belt Squeaks
My 2004 Cobra just turned 50,000. I had a performance tune at 36,000 - crank pulley replaced, idler, Predator tune with dyno. 425 hp at the wheels. Love it!
The serpentine belt started squeaking a couple months after tune. The shop replaced an idler and the belt, but the squeak came back. Tried one more belt, same result. Haven't tried any soap or sprays - shouldn't need that, right? That's where I'm at now. Sounds like loud crickets!