on an earlier post i stated i took off the plate on the y pipe on intake and knocked the carbon out of it and some fell into the plenum. now when i rev the car up (from idle to 4000)in neutral it smokes like a freight train.is that cause of the carbon that went into the cylinders or what??i really need to take it out and drive the shit out of it but right now its not licensed (stuck to drivin a family car). also what is good to remove carbon?? is sea foam any good or is it worth it?