Hi guys I have Fg g6e turbo. Mods include hole cut in airbox, k&n, Bosch 1000cc, PW cooler stage 1 and tune on 98. Ever since the tune car has rough idle but only sometimes. Also will stall once every 2-3 days say pulling up to lights or t junction at very slow speeds. Took it back tuner my who I have faith in. He had quick look few adjustments in tune. I decided to do new plugs (gapped) and fuel filter same time. I will try making a video of the idle next time it does it. Any idea's on what I should try next?