alright. my car is backfiring like hell. i have no idea why. started after a heavy rain the other day. i looked at the plugs. they had water around the boot and on the plug. sucked the water up with a shopvac and put in new plugs. they are getting spark&fuel y the hell am i having a backfire. my friend said it could be caused by a blown manifold gasket. but i doubt that.even though it does have a blown gasket. no check engine lights either. it backfires constantly from 1500 rpms up to 6000.