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Old TR1 Discussion Boards (read only) >> Discussion Board 2005 >> backfire, missfire, popping and banging
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Message started by Bob Appleby(Guest) on 01.10.05 at 20:14:00

Title: backfire, missfire, popping and banging
Post by Bob Appleby(Guest) on 01.10.05 at 20:14:00

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




Title: backfire, missfire, popping and banging
Post by Georg Horn(Guest) on 01.10.05 at 20:37:00

Try leaving away that silly mixture control valve... Whats with the valve clearance?
Bye,
Georg


Title: backfire, missfire, popping and banging
Post by Bob Appleby(Guest) on 02.10.05 at 17:09:00

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! ;-)