My car was making a flapping noise when i accelerated and last time i took it to the mechanic it was the air injection pipe. He went on and put a new pipe and the noise went away. Six months later the same noise is coming back but the pipe is not broken but it seems pretty loose. I'm going to try to fix it myself and was wondering if theres anything that i need to know before i start on it. Thx

 

may just need tightening. gona be a pita to get to.