try removing the main injector on the injector body and cleaning it and see if that improves things any?
when you remove it take note if there is any oil buildup on it
if after cleaning it performance improves then this is most likely your problem, but do keep in mind you may ultimately have to replace the main injector, cleaning it is just a step towards that if the cleaning does not hold up.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.