- posted
18 years ago
PT Cruiser siren ???
- Vote on answer
- posted
18 years ago
No way of knowing if this is what's going on in your case, but I had a car with a foghorn brake booster. Under specific conditions of ambient temperature, engine temperature, manifold vacuum, throttle opening, cruise control use and vehicle speed, a lot of very fleeting factors met in a particular way, and the brake booster diaphragm would resonate with a very pure sort of hooting tone. It never caused any harm and there was nothing the matter with the booster.
DS
- Vote on answer
- posted
18 years ago
Found it! Further symptons made me suspect brakes. Sure enough, found a warm front wheel caused by a sticking caliper.