Join Date: Sep 2008
Location: Fruitland Park,Florida
Not just grounds, but check wiring, connectors also. Have you checked the opti wire harness that runs between opti and passenger side of intake. Check it's wiring and the connectors for burnt, bent, corroded pins.
Spray a little mist of water on spark plug wires, run at night, and see if there is any spark leakage. Do the old pull a spark plug wire off, while running and see if it changes the rpm. Do all 8.