M800 - Vaporizer tube disconnected

eternalck · 25th June 2009, 05:31

Hello... i recently noticed that one of the tubes that leads to or from (the left one) is lying disconnected on my carb m800!? It has recently been serviced at a MASS.
I also notice a distinct smell these days around the car when i stop after a drive.

Why on earth is it disconnected? And if it is necessary for engine operation, how is the engine running?

humyum · 25th June 2009, 11:58

Its mostly the Vaccume tube, It allows the secondary butterfly to open, Check it out, will lead to downing in performance.

PS: just read the heading , vaporuiser tube which goes in the black dabba ? if its that, just connect it back to its stock location in the black box!

eternalck · 30th June 2009, 18:33

the tubes were connected on the dabba. The left one which goes into the carb is the one disconnected.

I had the butterfly changed because of a missing part for FICD for an AC, and it is one from an older engine. I went to the mechanic, he said the older engine did not support this functionality of a vaporizer. he just blocked this tube.

Now please tell me what function did it play and what effect will it have on the engine performance (pollution, pickup, anything).
If its something important, then i will have a new one fitted in it.

SirAlec · 30th June 2009, 23:58

check two things. one check the mileage of your car after the removal. also check the emission with a PUC machine.

aren't you smelling petrol odour.

eternalck · 1st July 2009, 00:25

Quote:

Originally Posted by SirAlec

check two things. one check the mileage of your car after the removal. also check the emission with a PUC machine.

aren't you smelling petrol odour.

well now i'm not since he closed the open end of the tube.

and the mileage feels good, haven't got the figures yet though. will carry out a puc test tomorrow.

eternalck · 14th July 2009, 13:39

i got it tested for PUC, and the result was quite surprising!

CO was at 0.002ppm (or whatever the unit is)! nHexane at 58ppm!

(the previous one 3 months ago had CO at 1.15 and nHexane at 180).... is something wrong? is this normal for a pre bharat 2!? these were taken at high idle around 1100RPM.

25th June 2009, 05:31	#1
eternalck BHPian Join Date: Nov 2008 Location: New Delhi Posts: 175 Thanked: 94 Times	M800 - Vaporizer tube disconnected Hello... i recently noticed that one of the tubes that leads to or from (the left one) is lying disconnected on my carb m800!? It has recently been serviced at a MASS. I also notice a distinct smell these days around the car when i stop after a drive. Why on earth is it disconnected? And if it is necessary for engine operation, how is the engine running?
	() Thanks

25th June 2009, 11:58	#2
humyum Senior - BHPian Join Date: Feb 2006 Location: Mumbai Posts: 2,752 Thanked: 5,431 Times	Its mostly the Vaccume tube, It allows the secondary butterfly to open, Check it out, will lead to downing in performance. PS: just read the heading , vaporuiser tube which goes in the black dabba ? if its that, just connect it back to its stock location in the black box! Last edited by humyum : 25th June 2009 at 12:12.
	() Thanks

30th June 2009, 18:33	#3
eternalck BHPian Join Date: Nov 2008 Location: New Delhi Posts: 175 Thanked: 94 Times	the tubes were connected on the dabba. The left one which goes into the carb is the one disconnected. I had the butterfly changed because of a missing part for FICD for an AC, and it is one from an older engine. I went to the mechanic, he said the older engine did not support this functionality of a vaporizer. he just blocked this tube. Now please tell me what function did it play and what effect will it have on the engine performance (pollution, pickup, anything). If its something important, then i will have a new one fitted in it.
	() Thanks

30th June 2009, 23:58	#4
SirAlec Senior - BHPian Join Date: Sep 2006 Location: zxc Posts: 3,393 Thanked: 726 Times	check two things. one check the mileage of your car after the removal. also check the emission with a PUC machine. aren't you smelling petrol odour.
	() Thanks

14th July 2009, 13:39	#6
eternalck BHPian Join Date: Nov 2008 Location: New Delhi Posts: 175 Thanked: 94 Times	i got it tested for PUC, and the result was quite surprising! CO was at 0.002ppm (or whatever the unit is)! nHexane at 58ppm! (the previous one 3 months ago had CO at 1.15 and nHexane at 180).... is something wrong? is this normal for a pre bharat 2!? these were taken at high idle around 1100RPM.
	() Thanks