Quote:
Originally Posted by THE EVIL TW1N
no modern vehicle should have a rough idle. take it back to the dealer.
|
Really?
Actually there is a compromise made when designing the camshaft. If you want maximum drivability/smoothness, that's fine, but you sacrifice some power. If you want maximum power, you can get that, but you sacrifice the smoothness. At the power level GM decided upon for these cars, there is a bit of a shake at idle. This isn't a 2-liter 4 cylinder here. As stated by several above, a rough idle is normal for this engine. If there is any hesitation or problem upon acceleration then that is NOT normal.
After changing the cam in my '99 SS, it shook the house at idle. Literally, you could hear glasses in the kitchen cabinets clanging together. There was nothing wrong with it...just decided on a cam that delivered more power (and a nice lope to go along with it).