Toyota Camry 2002 misfiring

Now that you mention it, you should find out exactly what error codes were stored in the computer. Its likely that the evap system code is still there, but there would have been codes related to the misfiring. The codes look like “P1234.” Find out what codes are there & report. If there’s no record of them on the invoice or at the shop many auto parts stores will read them for free.