Bad fuel injector grommets=vacuum leak-please read if you have a bad idle
 

Hey guys, I was trying to figure out where my vacuum leak was coming from, and thanks to this forum I found out what it was. I never would have thought that fuel injector grommets would cause a vacuum leak. It was a very big leak at that. Anyway, I want to tell you guys that if you have a vacuum leak and can't find it, it is more than likely your grommets. Also, thanks for everyone on the bored who helped me. Thanks again!!!:) :) :) :)

yeh man. i had leaky primary fuel injector grommets and it was like impossible to find. it ran like shit. i changed all the vacuum lines and i still heard a leak. i did the carb cleaner test n i kept gettin a leak in the same spot. so i finally changed them n bam that was it. id never think of it either.

how bad did it run

I have seen when all else fails, the Grommets are usually the culprit. Good you found It.