High Pitched Whistle Coming from Engine in Cold Weather?
#256
Ever since I installed my 80MM throttle bodie I have a constant air noise. This is caused by the throttle bodie being to big for the stock intake manifold. When It's -20 to 20* I have two air whistle's going on. The second air whistle is the fact of cold air going through the plastic intake manifold and causing a whistle through my air intake. It's quit annoying!
#258
#259
I live in Nova Scotia and up until last week it has been warm. Last week it got cooler and on my way to and from work(25 minute drive at highway speeds of 110 kph) I would get the intermittent whistle- first thought it was radio interference. I own an 05 supercrew, 5.4 4x4. Will wait and see if it goes away with warmer weather before replacing alternator. Noise does sound like air slipping through a tight seal but can't find anything yet
#260
This and many other similar issues (with both my 2005 and 2010) led to me change brands. Sad but true.