2006 Scion xa runs rough

Hi - Dave here, contributing to RepairPal and providing expert advice since 2010. Perhaps spark plugs and coils are not the cause of your engine misfire. Have you performed diagnostic testing? Yes, plugs and coils are often the cause of a misfire. But what about checking base engine compression? Maybe there is an internal engine problem? Or fuel system issues - it could be an injector problem? Hands on testing is needed to figure out what needs attention. https://repairpal.com/auto-repair-near-me Click the link to find some shops near you who can help out!