Check you exhaust. I bet you have a crack in the pipe. Check in 2 spots. One is by the y fitting by the rear head. The other spot is by the rear passenger floorboard. it's another y connection. Those are the 2 common spots for cracks and leaks. If those are fine I would check for an intake leak.
I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_5bac37c3cb991fdb
Answers & Comments
Check you exhaust. I bet you have a crack in the pipe. Check in 2 spots. One is by the y fitting by the rear head. The other spot is by the rear passenger floorboard. it's another y connection. Those are the 2 common spots for cracks and leaks. If those are fine I would check for an intake leak.
I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_5bac37c3cb991fdb