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

by in Decatur, IL on April 22, 2013
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3 answers 1 comment
ANSWER by , April 22, 2013
Good tune up should fix it!
COMMENT by , April 23, 2013
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.
ANSWER by , April 22, 2013
check for vacuum leak
ANSWER by , April 23, 2013
po 300 is a random misfire code. poss tune up if its been awhile