weird thing happened to me .. when i first took out the resistor my engine pinged like a bia .. so i put it back in reset the computer and ran fine .. so at my shop i took it out again , reset the computer and no pinging .. weird stuff .. i also bought a 5k pot and soldered it in place so i will be messing with it more in the days to come .. if everything goes well i should be able to fine tune my timing ...