Re: Diagnosis Needed

Posted by PackardV8 On 2010/3/27 19:36:28

My Packard V8 has ALWAYS exhibited a less than smooth idle. New timing chain, valve grind (18k miles ago) , lots of carb work and it still won't idle as smooth as it should or at least not like any of the SBC's i've owned.

Vaccum steady at 16 to 18 in of Hg. Idle screws (original Carter WCFB) has little to no effect on idle adjustment. In fact i can take the idle screws completely OUT. OR screw the m all the way in. Little to no change.

The idle seems to have become a slightly more ruff over the last 2k miles. I'm suspicious of timing chain or timing gear key position or cam shaft on this one.