hi my 1.8 sri has developed a nasty rumble when driving and engine under load.
sounds like exhaust (burbles like sports exhaust but aint) but can find no leak
could it be cat dying what does that sound like..lacks a wee bit smoothness feels a bit chocked..but will fire up to 100mph + when floored noise gets faster as speed increases
noise is not there when starting in morning but quickly appears after bout few hundred yards.
recently passed mot under this condition but noise getting worse with time.
i sense a small vibration under car at floorpan.also on passenger sideany ideas anyone had similar