Hi guys my rb20 has just started to backfire and die when it gets hot. it runs fine for a while at running temp but after probably 30 mins it pops, backfires and dies. i can restart it a couple of times, it will run for a few seconds then the same thing, then it wont start at all until it cools down (30mins). Its running motec and no afm. Had the car for more than 5 years, never had this problem. Have just replaced the igniter with a motech x6 to rule that out. Im thinking possibly cas next? Seems like it must be something temperature sensitive...