1996 del Sol VTEC (b16a2)

Alright... ran some SeaFoam through the Slo (brake booster, oil, fuel, the works). Of course it bogged it down when I was running it through the booster, but it recovered quickly... runs like a top still. BUT my check engine light came on.

It's showing a code P1300 (random misfire) and P0301-0304 (random misfire on all cylinders)

So I'm wondering what you guys think may be triggering my light. As I said, the car runs great, fuel economy hasn't changed, nothing. I have cleaned the IACV and changed the plugs within the last day and still no change. I'm guessing I fudged up a sensor or something?


Thanks for any info and reps will be given.