Pings like before I changed the pleunum.. Its only about 2mo old.. any ideas?

 

Any new oil leaks when you look down inside?

 

Even if you did replace it, it still can be leaking. Depends on what parts you used. If you just replaced the gasket then it will leak again

 

what else should have been done when replacing the plenum gasket?

 

Which parts should I have used? Rtv black high temp.. new gasket and a in/lb torque wrench? Could bad gas cause it? It jus started today. an it kinda boggs out.. I will try some heat and new gas.. if not then I might need some ideas to fix the problem.

 

the bogging sounds like a vacuum leak.
if its been running fine for 2 months,and just started pinging yesterday, don't panic.
could be some bad gas.
could be a broken, cracked, or rotted vacuum line, including all the way down to the t-case. sometimes its easier just to temporarily plug them all at the manifold, and do a short test drive. it its ok, then add them back one at a time until you find it.
could be carbon buildup.