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S60 Bi-Fuel 2003 - LPG issues

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Old Feb 11th, 2017, 10:49   #21
CNGBiFuel
Classic P80 1999 BiFuel
 

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Is this a double post? Rather than create a mess, shall we delete and start again?
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Old Feb 11th, 2017, 13:00   #22
Russki
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Originally Posted by CNGBiFuel View Post
Is this a double post? Rather than create a mess, shall we delete and start again?
We can, but basically I got the same car with similar problems. If another person will come with the same car and system it will be really simple to find rather than search thought different posts. Anyway I am new here and don't know how its done on this forum

On one of the Russian LPG forums I fount a thread where all koltec-necam problems and solutions are spread over 60 pages
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Old Feb 11th, 2017, 13:36   #23
Simon Jones
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Originally Posted by Russki View Post
WHERE I can buy a manometer in this country? It seems almost impossible to find one that will not cost a fortune....
Speak to your local plumber. They are used for testing for leaks on gas pipework. I've just had an LPG Jotul stove installed at home and the pipes were pressurised with a digital manometer attached so any drop in pressure could be detected. You can buy a traditional manometer very cheaply from a plumbers merchant. This one is just £16: https://www.transtools.co.uk/hand-to...as-tester-30mb

Last edited by Simon Jones; Feb 11th, 2017 at 13:39.
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Old Feb 11th, 2017, 15:36   #24
CNGBiFuel
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OK, an answer over 60 pages, and you want to take part in making more of the same... now you've explained it, makes sense.
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Old Dec 18th, 2018, 07:50   #25
Andrioman
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Hello CNGBiFuel !
I came around your post in this forum about the problem with the stepper motor on Bi-Fuel systems. I have the exact same problem with my Volvo. The engine cuts off randomly on CNG when the car is hot. It's on 220k kilometres. I went to a guy who is very famous in my country with the understanding and abilities to fix all Volvo Bi-Fuel cars and he changed 3 different stepper motors on my car with no success. He said that the problem maybe in the computer which is responsible for the CNG and he offered me to change all the electronic and the injectors for the CNG. The thing is that I don't want to do that! I want my car to be as it is from the Factory...
Do you think that my problem is the stepper motor,or there is a possibility to be the CNG computer?
Thanks a lot for your help!
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Old Dec 18th, 2018, 08:15   #26
CNGBiFuel
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The big issue with the facory system is diagnosis. 90% of problems come down to the stepper. When it isn't, many of the other issues, unless you know it well enough, are difficult to diagnose.

If your specialist has put that many steppers on and still these don't give you at least 10,000 miles motroing, the issue is not the stepper.

Then it gets difficult and pricey to diagnose. If steppers do not solve the problem, often it becomes quicker and easier to remove the Necam system.

If you were here in the UK, I would speak to you. Without me to fault-find it, I think you have little choice but to remove the Necam system.
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Old Dec 18th, 2018, 10:15   #27
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Thanks a lot for your fast answer!
The thing is that he tried with one second hand (but recycled motor), and the problem was the same, even worst, than he put another motor, but this time some different one which didn't had its own electronic, but separate one. That one didn't work too. Than he tried to fix my own, but without success,so that's why he think the problem is in the computer... If it's the computer, than maybe is some bug in the system which can be fixed if I remap the computer, or I'm wrong?
Sorry if I ask stupid questions! If I was in UK I would defiantly come to you! Unfortunately I'm too far...
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Old Dec 20th, 2018, 09:35   #28
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Quote:
Originally Posted by CNGBiFuel View Post
The big issue with the facory system is diagnosis. 90% of problems come down to the stepper. When it isn't, many of the other issues, unless you know it well enough, are difficult to diagnose.

If your specialist has put that many steppers on and still these don't give you at least 10,000 miles motroing, the issue is not the stepper.

Then it gets difficult and pricey to diagnose. If steppers do not solve the problem, often it becomes quicker and easier to remove the Necam system.

If you were here in the UK, I would speak to you. Without me to fault-find it, I think you have little choice but to remove the Necam system.
Hey! Thanks once again for your answer! And thanks a lot for taking your time to make the "FAQ Faults & Tips for factory Volvo Bifuel LPG / CNG" topic!

I read all you've wrote at "FAQ Faults & Tips for factory Volvo Bifuel LPG / CNG" and I think, that maybe my problem is the stepper motor too. I decided to try cleaning my distributor and the stepper motor first and then if the situation is the same I'll have no choice, but to change my electronic and the injectors...
I only have few questions. Is there some instruction somewhere on how to clean the stepper motor? I know that it has a problem with the soldering of the electronic where the heat plays big role and I plan to re-solder some points there (I have some background in electronics and I think I can do it),but is there something else that I have to clean on the stepper itself? Do I have to disassemble the motor?
And last one Do you have any idea, where is located my CNG computer? I saw some pictures in "FAQ Faults & Tips for factory Volvo Bifuel LPG / CNG",but didn't saw and I'll try to located my self, but in case you know, will be much easier for me.My car is Volvo V70 2006...
Thank you!

Last edited by Andrioman; Dec 20th, 2018 at 09:39.
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Old Dec 23rd, 2018, 17:29   #29
Andrioman
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Default I did it :)

I did it I think I've fixed my problem I cleaned the distributor as shown in"FAQ Faults & Tips for factory Volvo Bifuel LPG / CNG" topic by CNGBiFuel and the most important I've fixed the stepper motor by re-soldering few points in the electronic, where I found problems! I think, that the main problem with the stepper motor comes with the electronic, because of the intense heat generated from the engine... because of the heat some of the soldering were broken...
It was relatively easy job
I drove more than 200 km without any issue. I really hope that my problem is fixed for long time ahead
A really BIG thanks to CNGBiFuel for the detailed information about cleaning the distributor!!!
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Old Dec 24th, 2018, 09:35   #30
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I have been in a lot of lpg vehicles and to be honest I would say that’s normal.EML illuminates all the time, smell of gas, poor running. And all so you can save 10 quid a week whilst paying out hundreds in repairs.

When will people learn!
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