think I finally found the source!!!!!!!! changed the fuel filter with no change and decided to do a complete check of every possible vacuum source as it still is running lean. took a can of brake cleaner and doused all intake orifaces and low and behold... the #4 fuel injector has a big vacuum leak and the #3 has a small leak. Looks like the gentleman who rebuilt my engine didn't do such a fine job of reinstalling the injectors.... <img src="/forums/images/graemlins/angry.gif" alt="" /> So... off comes the upper intake to access the injectors. Anybody have some Best known methods for pulling injectors? Since I'll have them out.. I'll send them out for cleaning and balancing. Thanks for the resources above for this service.