Beating my head on the wall over here!! LOL Got a misfire in cyl 1, new plugs wires and coil pack, cleaned the throttle body and intake, replaced the injector at no. 1, good fuel pressure, good spark, manifold vacuum reads 20in with a regular drop of only an inch or so which coincides with the misfire. I'm planning on pulling the head but would like to hear any other suggestions before I tear it down. Thanks!

 

did you do a compression test to see it you have a burnt valve? There have been valve issues.

 

what type of plugs did you use, champion double plats,
I have heard of problems with using other plugs

probably not the problem but would be a easier fix

 

Well, don't pull the head until you know what you're compression is.....

Pull that spark plug and make sure you didn't close the gap or the porcelain isn't cracked. Swap 1 and 3 plugs just to make sure.