Thanks man. I had a duel coil driver for #4 and #1 go bad .. so after swapping drivers around to diagnose I bought a new one .. all was good for a few trips then it started cutting out randomly and then the coil driver for #4 and #1 went out again. because of swapping out the new one was on a different set of coils. So I purchased a used complete assembly. Bench testing all 12 coils I have I couldn't find any big differences in reading But i knew # 4 or #1 must have been shorting out causing the driver to go bad. Any way I ended up replacing those 2 coils and driver from the assembly I bought. I even went through all the plug wires using the 6 with the least resistance. and although my plugs are new I pulled them and made certain all the gaps are the same. Engine is running great now .. no cutting out and stronger than ever. I never found what the value ranges are suppose to be on those coils .