OK i've got a 94' gmc safari awd 4.3 vortec (it has the w in the vin so i think it is a vortec) and it began to run rough at idle and almost sound as if it was misfireng i hooked it up to a scanner and it is an EGR valve- where is it so i can clean it or replace it?
PLEASE HELP SOON!
also how bad is this for the car- i need to drive to work tomarro! from my understanding it just makes it run rich because of a vacume leak- (btw i had it scanned for free-

he he he WOOT!)
so any help would be great- also any tips on cleaning it?
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94' GMC Saffari EXT AWD Conversion by Glaval Vans