I found that replacing the fuel injectors, seals and holders as well as all of the air piping from the manifold up through the idle control valve to the injector manifolds cleared up my warm start problems as well as a slightly high idle speed problem I was seeing. Between leaky seal and leaking injectors I guess I needed to bite the bullet and replace it all and it worked!

1 long day under the hood and about $400 worth of part later and my SL is purring again.