Ping on cold startup?
 

It is most noticable when the engine is cold and the revs are choked for the warmup. I guess I never really paid attention to it untill I brought it in for the air bag recall and was told I had an exhaust leak. I retightened the header bolts and the exhaust bolts. The muffler is undersized but with the raido and A/C off I can notice mild ping on idle and for sure on cold starts. :hmmm:

I see your profile lists headers.....

If you are talking about a ping that sounds like an exhaust leak, it could just be a characteristic of the headers....or it's possible that you still have an exhaust leak (which will be more pronounced when the engine is cold) and will have to replace the gaskets between the heads and manifolds.

Pinging sounds like someone shaking a can of marbles......

Ticking is a sound more associated with headers....might be time for some new gaskets...