???Whistling I Always Hear on Caprices???

[RamAir81]

Originally Posted by PeteA216

I noticed something new. If the idle drops to about 300 RPM, then the whistling fades to almost nothing. I dont know if this helps at all, but hey, I figured I'd add it just in case ;-)

Caprice Engine Whistle

Why is your idle so low? My emission label states 650 RPM in drive. Maybe its the carb sucking air at such a low RPM. I have a 81 w/305 and I do not have a whistle at all. I still have all the emission equipment on it. Sounds like you have a vaccum leak.

[PeteA216]

The label on mine says 500 RPM, I lowered it down to 300 just to see what would happen at that low of an idle (experimenting). I brought it back up to a little below 500 now. Theres no vaccume leaks (that I know of at least). When I got the car about three, maybe four years ago, I went and replaced all cracked, and stiff vaccum hoses. I've also recently rebuilt the carb, and have a new base gasket as well.


Caprice Engine Whistle