have a coil pack tester.. voltage and arc... found passenger side front port was my problem...checked coil pack and broken up and messed plug up to...so changed plug and used 1 of the old coilpacks that wasn't cracked...car ran fine tested voltage and arc and was same as the others...raised rpm rechecked all was good... drove home car ran perfect till just before my house lol!!! iv got to laugh or ill go metal!!!....started missing again... so I know its that coilpack... I just don't have another to swap... there so expensive new... total pain in the ****!!