Misfire

[ZRXMAX]

Can't locate the source of a missfire. Under light throttle it runs ok, however, anytime you give it a little throttle it misses on what seems to be one cylinder. I have changed the coil packs back to my old stock ones because they still worked fine when I replaced them. They all show about 6 ohms resistance. Also checked the injectors with an ohm meter and they were all good.

The plug wires are pretty fresh and look to be in excellent condition.

A week ago it was running good and then the number 1 spark plug wire started coming off every minute. It turned out I had accidentally gotten some dielectric grease on the end of the plug. Once cleaned it stayed on.

When I changed the plugs I discovered that the insert in one of my spark plug sockets had stayed on the number 8 spark plug and came out with the boot when I reinstalled new plugs. Since it was the last new plug installed, and, you cant see in the plug hole without a mirror I didn't notice it until I changed all the plugs again to eliminate one possibility for a misfire.

Any suggestions on what to look at next will be appreciated. I have pulled the plenum twice and I am right back where I started. It did run real good briefly until the number 1 plug wire started coming off.