so I replaced the egr valve and egr vacuum solenoid engine light was on for egr system and found that the egr was clogged anr rusted,ended up breaking the vacuum solenoid so i replaced both. I also replaced the coolant hoses that connect to it because they were very swollen and brittle. now the egr vavle is making a flapping noise and no engine light. the old setup wasnt making any such noise and I have never seen or heard of this before. please help if you can.