well it makes it run slightly richer, but my car dont move allot and when i go to start it usually need to do that to start it but it dont over fuel and ive got my Cold start valve disconected but yea i think it would put more fuel in. can always try it if your stuck tho. if it floods it wont start for a while till the fuel runs down into the sump. Aye well try the old plugs and see how you get on. G'luck