badd rattle!! odd revving while spooling in 4,5th while hitting gas?
Hello yall, it`s sure been a while. My car has been running good till recently. After I got my TBE put on, I have this bad rattle when the car is at idle, turn it off, & sometimes when I start it. I believe it is the heat shield hitting the exhaust, correct?? I have a 3 in. Apexi N1 CBE. My DP is a no brand (Helix style) 4in. Bellmouth. I had to go back to the shop so they can put another gasket on where the exhaust & Dp meet cause it got loose the first time the exhaust was put on. I dont know if there is a leak?? I do know that some DP`s have a common fitment problem, No?? & Now just recently..while on the freeway, mostly in 4th & 5th. round 80 @ 3,000 rpm. I slowly push the gas & my car revvs funny for a second & then spools normally. I watched as it does this & it will hit full boost & then go down & then back up?? Is this called surge?? & is that because of too much air?? thanks folks, the responses are greatly appreciated.