v70 bifuel 52 reg.

DELBERT · Jun 9th, 2010, 15:21

hi misfires on gas at 60-65mph.click to petrol and clears immediately,back to gas and misfires. cuts out completely on gas on occasions and refires when put back to petrol but will not run on gas at all until i stop and turn off ignition for about 5 mins. when i bought car in november this happened on rare occasions but has of late become a daily problem. took it to lpg converter in january and told he could find no problem on his diagnostics check
any help or advise please. thank you

capt jack · Jun 9th, 2010, 20:15

How old are the spark plugs?

LPG doesn't like worn out plugs, and will not run with tired plugs that are otherwise OK with petrol.

If the plugs have done more than 10,000 miles on LPG then they're due for a change.

I'm a bit surprised your LPG man didn't suggest this to be honest, but if you know for sure that the LPG system is good then it has to be electrical.

Bosch Superplus with single point electrodes work well. Multi-points will give trouble on LPG in time.

Cheers

Jack

humphrey999 · Jun 9th, 2010, 20:32

Not very helpful but...

Do you always fill up at the same garage? I reckon I had a bad oily tank of gas and I had identical problems but eventually they resolved themselves and the car runs normally now. If you always fill up at the same place perhaps the gas is not the best quality? I reckon that the oil slowly worked it's way through the system and was burnt away leaving the system without further blockage.

I know that all LPG has some oil in it...

DELBERT · Jun 9th, 2010, 22:14

hi jack
many thanks for your reply.car was serviced 2000 miles ago by local garage(not volvo) so i will check type of plugs fitted.
cheers
derek

classicswede · Jun 9th, 2010, 22:38

If the problems got worse not long after the service then it is quite possible they fitted platinum plugs. LPG and platinum plugs do not mix so well and can cause problems.

Is the car a factory fit or converted car? If converted what system does it have?

capt jack · Jun 10th, 2010, 21:16

Quote:

Originally Posted by classicswede

If the problems got worse not long after the service then it is quite possible they fitted platinum plugs. LPG and platinum plugs do not mix so well and can cause problems.

Is the car a factory fit or converted car? If converted what system does it have?

Absolutely agree - copper-core single elctrode plugs are best - and also just about the cheapest too!

Jack

Dips · Jun 14th, 2010, 19:26

Hi, My 02 plate S60 bi-fuel is doing pretty much the same, it misfires between 55-70 seems to be getting a little bit worse, when i run on petrol it runs like a dream. I'm guessing the service was not completed on the LPG as you either have to take it to a specialist or volvo, not many people will touch volvo lpg systems. I had the plugs changed which has not resolved the issue but has helped, this is positive and tells me it may not be anything to serious, best taking it to lpg specialist and having it serviced, pressure tested and filters changed. Im doing the same.

666bryan · Sep 6th, 2011, 23:31

hi my 2002 v70 bifuel factory fit is doing the same since a service , the three prong plugs fitted, going to change to bosch supers, got the cheap one is this okay?

classicswede · Sep 7th, 2011, 22:25

i always use NGK bKR6ES

Jun 9th, 2010, 15:21	#1
DELBERT New Member Last Online: Jun 10th, 2010 21:45 Join Date: Jun 2010 Location: ipswich	v70 bifuel 52 reg. hi misfires on gas at 60-65mph.click to petrol and clears immediately,back to gas and misfires. cuts out completely on gas on occasions and refires when put back to petrol but will not run on gas at all until i stop and turn off ignition for about 5 mins. when i bought car in november this happened on rare occasions but has of late become a daily problem. took it to lpg converter in january and told he could find no problem on his diagnostics check any help or advise please. thank you

Jun 9th, 2010, 20:15	#2
capt jack VOC Member Last Online: May 26th, 2024 19:26 Join Date: Jun 2006 Location: Selby, North Yorkshire	LPG problems How old are the spark plugs? LPG doesn't like worn out plugs, and will not run with tired plugs that are otherwise OK with petrol. If the plugs have done more than 10,000 miles on LPG then they're due for a change. I'm a bit surprised your LPG man didn't suggest this to be honest, but if you know for sure that the LPG system is good then it has to be electrical. Bosch Superplus with single point electrodes work well. Multi-points will give trouble on LPG in time. Cheers Jack

Jun 9th, 2010, 22:38	#5
classicswede Trader Volvo in my veins Last Online: Today 19:12 Join Date: Dec 2004 Location: Anglesey	If the problems got worse not long after the service then it is quite possible they fitted platinum plugs. LPG and platinum plugs do not mix so well and can cause problems. Is the car a factory fit or converted car? If converted what system does it have? __________________ http://www.classicswede.org www.classicswede.co.uk

Sep 7th, 2011, 22:25	#9
classicswede Trader Volvo in my veins Last Online: Today 19:12 Join Date: Dec 2004 Location: Anglesey	i always use NGK bKR6ES __________________ http://www.classicswede.org www.classicswede.co.uk

Jun 9th, 2010, 20:32	#3
humphrey999 Junior Member Last Online: Aug 24th, 2020 21:03 Join Date: Apr 2009 Location: berkhamsted	Not very helpful but... Do you always fill up at the same garage? I reckon I had a bad oily tank of gas and I had identical problems but eventually they resolved themselves and the car runs normally now. If you always fill up at the same place perhaps the gas is not the best quality? I reckon that the oil slowly worked it's way through the system and was burnt away leaving the system without further blockage. I know that all LPG has some oil in it...

Jun 9th, 2010, 22:14	#4
DELBERT New Member Last Online: Jun 10th, 2010 21:45 Join Date: Jun 2010 Location: ipswich	hi jack many thanks for your reply.car was serviced 2000 miles ago by local garage(not volvo) so i will check type of plugs fitted. cheers derek

Jun 14th, 2010, 19:26	#7
Dips New Member Last Online: Jan 4th, 2014 15:29 Join Date: May 2010 Location: leicester	Hi, My 02 plate S60 bi-fuel is doing pretty much the same, it misfires between 55-70 seems to be getting a little bit worse, when i run on petrol it runs like a dream. I'm guessing the service was not completed on the LPG as you either have to take it to a specialist or volvo, not many people will touch volvo lpg systems. I had the plugs changed which has not resolved the issue but has helped, this is positive and tells me it may not be anything to serious, best taking it to lpg specialist and having it serviced, pressure tested and filters changed. Im doing the same.

Sep 6th, 2011, 23:31	#8
666bryan New Member Last Online: Aug 1st, 2016 11:47 Join Date: Aug 2011 Location: london	hi my 2002 v70 bifuel factory fit is doing the same since a service , the three prong plugs fitted, going to change to bosch supers, got the cheap one is this okay?

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