If you want to get a sampling of the content in the troubleshootting book Bob mentioned, one of the book's chapters can be read here: http://www.khen.com/sspt04.pdf.  Be aware that the topic discussed in this chapter isn't what the whole book is about.  There are 9 other chapters on other engine troubleshooting topics (see the full list here), plus some nifty utilities on the book's CD. 

Have a great XMas holiday!

Bart