Need help with engine misfire

[SVXpress94]

i recently started having misfiring issues with my 94 svx. i drove to work on all cylinders and when i went to leave one of them cut out. i left it running for a minute then it sounded like another cut out. after pulling off injector connectors found that 3 and 5 are not firing. i limped home and saw smoke coming from the right exhaust pipe only so im guessing the injectors are still firing. any suggestions?