Help me find the MISS!!!!
We just rebuilt our short block due to a destroyed piston and scarred cylinder. The only change to the engine was boring the block and putting in a 14.2 to 1 set of pistons from a 12.9 to 1 set. Compression is good in all cylinders. Everything else is the same. At idle it sounds like it is hitting on about 5 or 6 of the 8 cylinders. When you bring the revs up it sounds fine. We have checked the plug wires all test good, replaced the dist cap and rotor, 2 different sets of plugs, double checked our valve settings and we don't know where to go next. The ignition is a Msd Digital 6 with an HVC coil and a locked out pro billet dist. Any suggestions on where to look next would be appreciated.