My 2008 F250 has a chirping noise that seems to come from the front to mid part of the engine, but itâs hard to tell if itâs coming from the tensioner or not. I do not hear it under acceleration. I can only hear it once I let off the gas or when itâs idling. The operating temp doesnât seem to affect it. It does it whether itâs a cold start or if Iâve bren driving All day. Again, the noise isnât a screeching or a squeaking noise. It makes a âchirpingâ sound. Any idea what it could be? I was Thinking a piston cooling jet or a tensioner.