340 dl very lumpy when idle?

spike4073 · Feb 16th, 2009, 10:27

my 340 dl auto has started being very lumpy when idleing and has started cutting out ocasionaly if i break hard....(stalling?) it is a cvt so i dont know if they can stall but that is the best way i can describe what is happening....any ideas??

pettaw · Feb 17th, 2009, 23:52

Its either got an air leak in the induction system somewhere causing a weak idle mixture, or an ignition fault, something like a dirty/worn dizzy cap. That's where I would be starting. First check the dizzy cap and then start searching for air leaks around the carb base and inlet manifold.

spike4073 · Feb 22nd, 2009, 19:34

thanx for the suggestions....i have checked the dizzy cap (clean as a whistle) and i cant identify any air leaks ...any other ideas??.........the lumpyness seems to go away however when i very gently press the gas peddle....maybee if i tighten the throttle cable a little???...all suggestions welcome.

spike4073 · Feb 23rd, 2009, 15:06

sorted!..

took the carb off...the gasket for the top section of the carb was broken and letting air in.....ive replaced it and its running good now.

Feb 16th, 2009, 10:27	#1
spike4073 Member Last Online: Nov 26th, 2011 11:12 Join Date: Aug 2008 Location: sheffield	340 dl very lumpy when idle? my 340 dl auto has started being very lumpy when idleing and has started cutting out ocasionaly if i break hard....(stalling?) it is a cvt so i dont know if they can stall but that is the best way i can describe what is happening....any ideas??

Feb 17th, 2009, 23:52	#2
pettaw Forum Support Team Last Online: Jul 23rd, 2023 15:29 Join Date: Jan 1970 Location: Glasgow, London	Its either got an air leak in the induction system somewhere causing a weak idle mixture, or an ignition fault, something like a dirty/worn dizzy cap. That's where I would be starting. First check the dizzy cap and then start searching for air leaks around the carb base and inlet manifold.

Feb 22nd, 2009, 19:34	#3
spike4073 Member Last Online: Nov 26th, 2011 11:12 Join Date: Aug 2008 Location: sheffield	thanx for the suggestions....i have checked the dizzy cap (clean as a whistle) and i cant identify any air leaks ...any other ideas??.........the lumpyness seems to go away however when i very gently press the gas peddle....maybee if i tighten the throttle cable a little???...all suggestions welcome.

Feb 23rd, 2009, 15:06	#4
spike4073 Member Last Online: Nov 26th, 2011 11:12 Join Date: Aug 2008 Location: sheffield	sorted!.. took the carb off...the gasket for the top section of the carb was broken and letting air in.....ive replaced it and its running good now.

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