04 tahoe sat for 3 plus years 150K miles. New clean fuel, new fuel lines. starts and runs. code po0300? No vaccume leaks runs a little rough under load od acceleration is good. all coils test good, i am going to replace the plug wires. i get mixed info on the spark plugs? originals 41-985 look ok, not fouled. Can they be cleaned and reused? should i change with ac delco iridium 41-162? or 41-962 double platinum. some say original plugs can last 300K? what plug options would you guys suggest, thanks! Albos