could a bad plugs cause an idle issue i have a bad loop when cold idles at 1500 rpms then drops to 500 then idles at 1500 then drops i check the plugs and the gap is at .060 if not more. i already check vacuum hose,change iac, but now its pissing me off i pulled codes but nothing should i do a tune up. .the plugs are about 2 years old and i got ford motorsport 9 mm wires. there is a little white residue on the plugs. im ready to sell it and say **** it need help bad i already shock myself twice trying to time it by putting my hand on the cap is that suppose to happen im confused