Hey folks. My 4runner has been sitting for several weeks for some projects and finally back on the road this weekend. Drove it twice for 15-20 miles with no issue. Today, i head out and at first stop light it dies. Starts right up but won't idle without my foot on the gas a bit but otherwise seems fine. After several miles it seems to have cleared up (idles around 5-600 rpm). I get on the highway and it starts to run rough. Engine light comes on.

Codes present are P0300 and P0302. Cleared codes and drove home. Same rough running. Read codes again and just the 300 this time.

Only things I've done in last 24 hours is a tank of gas (87 octane which I usually don't do but I'm questioning that) and I tried in vain several times last night to do the zero point calibration to include disconnecting my battery for several minutes.

Anyone ever have this happen so suddenly and severally?

Thanks.