What would cause this on 2000 Chevrolet S10

Truck shakes in idle. The p0300 code appears. It acts like it wants to die when stopping or backing up

Asked by for the 2000 Chevrolet S10
3 answers 1 comment
Good tune up should fix it!
I changed the plugs, wires, cap and disc. Also changed the spider injector. And I've changed the thing that rattles when u shake it. Think its the egr valve. Checked all vacuum hoses. Found a few that had holes and changed them. Had fuel pump tested. And changed fuel filter twice since febuary this year.
check for vacuum leak
po 300 is a random misfire code. poss tune up if its been awhile