intermittent missing on cold engine

Paul-C · Oct 6th, 2015, 20:54

Looking for advise on the following issue please.
The car (960 3ltr estate with tartareni single point injection installed in 2000) generally runs ok but sometimes the following occurs
From a cold start on a morning, the car runs ok for about 2/3 miles then starts running erratic.
After a few miles it settles down and is ok for the rest of the day
This is not consistent as some days there is no problem.
I have not had the problem when running on petrol and also during the erratic running if I switch to petrol there is no problem that I am aware of.
I have changed the injector top & bottom "O" rings about 2 month ago to rule out loss of fuel mix as the engine is warming up.
Any idea's
Thanks
Paul

4candles · Oct 15th, 2015, 20:47

I do hope you have studied, searched and re-searched this forum for for answers as a miserable, no doubt ugly s.o.a.b lies in wait under this lpg bridge if you have'nt!!!

classicswede · Oct 16th, 2015, 09:15

It sounds like it could be the vapouriser starting to freeze

volvoid · Nov 25th, 2015, 10:28

does that suggest that the engine needs to be a little warmer before switchin to gas ?

classicswede · Nov 25th, 2015, 22:55

Single point will most likely be starting on gas with petrol only as a back up.

Tartarini vapourisers are know for blocking up waterways and suffering these kind of issues

dingov70 · Nov 26th, 2015, 20:47

It is most likely down to lower temperatures reducing gas pressure in the tank , combined with less available heat in the evaperator . LPG powered forklifts also suffer a similar problem at this time of year , the are left in a warm location after a days work , so the gas evaperates to replace the gas used . Then when they go outside working the lower temp reduces the ability of the gas to maintain pressure in the tank & so you get a lower flow of liquid to the evaperator . Another & often overlooked problem is that LPG can actually leave a brown tarry gunk in the evaperator affecting how it operates , stripping & cleaning the evap normally cures the problem same as cleaning a carb or or fuel injectors . Be careful if you dismantle any parts of your lpg system as you may end up with a gas leak , liquid or vapour

Oct 6th, 2015, 20:54	#1
Paul-C Member Last Online: Apr 8th, 2024 16:24 Join Date: Jan 2006 Location: Riccall Nr. York	intermittent missing on cold engine Looking for advise on the following issue please. The car (960 3ltr estate with tartareni single point injection installed in 2000) generally runs ok but sometimes the following occurs From a cold start on a morning, the car runs ok for about 2/3 miles then starts running erratic. After a few miles it settles down and is ok for the rest of the day This is not consistent as some days there is no problem. I have not had the problem when running on petrol and also during the erratic running if I switch to petrol there is no problem that I am aware of. I have changed the injector top & bottom "O" rings about 2 month ago to rule out loss of fuel mix as the engine is warming up. Any idea's Thanks Paul

Oct 16th, 2015, 09:15	#3
classicswede Trader Volvo in my veins Last Online: Yesterday 21:53 Join Date: Dec 2004 Location: Anglesey	It sounds like it could be the vapouriser starting to freeze __________________ http://www.classicswede.org www.classicswede.co.uk

Nov 25th, 2015, 10:28	#4
volvoid Monster Raving Loony Last Online: Nov 12th, 2018 20:03 Join Date: Oct 2013 Location: hitchin	does that suggest that the engine needs to be a little warmer before switchin to gas ? __________________ 1994 850 2.0 bought at 32,000 miles used daily now 45,000. Still like a nearly-new car 2004 filthy polluting diesel VW

Nov 25th, 2015, 22:55	#5
classicswede Trader Volvo in my veins Last Online: Yesterday 21:53 Join Date: Dec 2004 Location: Anglesey	Single point will most likely be starting on gas with petrol only as a back up. Tartarini vapourisers are know for blocking up waterways and suffering these kind of issues __________________ http://www.classicswede.org www.classicswede.co.uk

Nov 26th, 2015, 20:47	#6
dingov70 Master Member Last Online: Apr 16th, 2024 06:48 Join Date: Jan 2015 Location: Blackpool	It is most likely down to lower temperatures reducing gas pressure in the tank , combined with less available heat in the evaperator . LPG powered forklifts also suffer a similar problem at this time of year , the are left in a warm location after a days work , so the gas evaperates to replace the gas used . Then when they go outside working the lower temp reduces the ability of the gas to maintain pressure in the tank & so you get a lower flow of liquid to the evaperator . Another & often overlooked problem is that LPG can actually leave a brown tarry gunk in the evaperator affecting how it operates , stripping & cleaning the evap normally cures the problem same as cleaning a carb or or fuel injectors . Be careful if you dismantle any parts of your lpg system as you may end up with a gas leak , liquid or vapour __________________ To stupidity & beyond

Oct 15th, 2015, 20:47	#2
4candles I've Been Banned Last Online: Mar 19th, 2016 19:57 Join Date: Oct 2013 Location: Yondershire	I do hope you have studied, searched and re-searched this forum for for answers as a miserable, no doubt ugly s.o.a.b lies in wait under this lpg bridge if you have'nt!!!

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