Well, it's only money. I can't be assed mucking with something that is intermitent & I have a 1 in 6 chance of MAYBE finding. For a little extra cost on OEM coils I just got some weaponX units. [FlameSuitOn] I know there is mixed opinion on the upgraded coils, I get that. For the furutre upgrades I'll do I don't want potential unreliablity. I'm going for premium equipment, the extra - maybe $125 - for a set over FoMoCo resold units is worth it for the better design of the plug end alone. This new Herrod Voltage booster is also a similar idea re lifting the delivered voltage so I don't really see the difference. Pretty much any excuse to upgrade at this point is fine, so I've gone ahead & got it done. [/WaterProofPants] But thanks everyone for the insight. Wouldn't have thought coils, but as with mot things auto electrical - #BlackMagic