AAAAARGH! HELP ME!
My '82 TR1 has an annoying misfire and/or backfire when shutting the throttle.
I've replaced the mixture control valve with a brand new unit (£50!) and checked all the hoses for leaks - no different
I've replaced the inlet stubs with brand new units (£60!)- no different
I've stripped and cleaned the carbs and replaced the diaphragms, needles and jets (£85!) - no different
I've set float levels exactly and blanced the carbs spot on - no different
Exhaust is in good order with no leaks
Engine is in good order - done about 25000mls - no bad rattles and runs ok except for the misfire when shutting throttle
anyone got any ideas?
fanx
Bob

I can't believe it! I took the stupid mixture control valve off and the popping and banging has stopped!
I wouldn't mind so much but the rotten valve is brand new - cost over £50!
ah well, at least it's running ok now.
thanx Georg, you are a star!