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LPG, CNG & LNG - General Info and Issues Share experiences and problems |
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Warning Brisk LPG spark plugsViews : 13510 Replies : 14Users Viewing This Thread : |
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Jul 17th, 2011, 23:48 | #11 | |||
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Location: Cardiff
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Jul 18th, 2011, 17:14 | #12 |
I've Been Banned
Last Online: Nov 27th, 2012 11:56
Join Date: Feb 2009
Location: Forest Row
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no fancy plugs
dutch installers (vogels) are adament NOT to install fancy sparkplugs
( 40 years of experience on lpg installation) |
Jul 21st, 2011, 14:54 | #13 |
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Last Online: Mar 26th, 2024 20:51
Join Date: Jun 2006
Location: Selby, North Yorkshire
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Plug ugly?
All that's been said about multi-point plugs certainly is borne out from my experience of running my 97 2.5 10v V70 on LPG for almost 200,000 miles now.
I've found that Volvo and Bosch multi-point plugs will certainly start to misfire within a few hundred miles. Champion, NGK and Bosch superplus single point plugs are a bit better, but will still start missing before 10,000 miles are covered. The plugs I've found work the best are Denso. I had to buy a set one time when the Bosch plugs in the car started playing up, and all the local motor factor had in stock were Denso plugs. It was a real stroke of luck because they have been consistently brilliant. The Denso plugs I use are the bog standard basic copper-cored single point type K20PR-U. I set the gap at 0.8mm. Best of all these sell at our local Motor Factors for around £2-odd each. I change the plugs every 10k miles, but I reckon they'd probably go on much longer - even when they come out the gap is still good, and there's no obvious signs of deterioration at all. Cheers Jack |
Jul 27th, 2011, 09:26 | #14 |
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Location: Bristol
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On a similar subject...
Our 340 1.4 with 32DIR carb has been plagued with intermittent poor idle, even stalling on occasions after a long motorway run. But it runs okay on petrol. Following this thread, I checked the plugs, hoping to find that they were multi-point. Finding they were single path simple beasties, that moment of hope died...
BUT THEN whilst in the area I checked the distributor. Found that the rotor and receptor contacts had blossomed and corroded. Cleaned them off and hey! Perfect idle again. So my method of comparing running on petrol and gas falls down here. Just because it runs on petrol, doesn't mean all is well. I see from the above contributions that gas needs a fatter spark. At crusing speeds this will be no problem, but at idle, any compromise in the spark intensity will be evident. So thanks to all who have helped me on this one. |
Jul 30th, 2011, 12:43 | #15 | |
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100% correct! It's easy to forget the distributor end of things, but in effect the spark needs to be working properly at both ends of the plug lead! If the spark ain't even reaching the spark plug, no matter how many pins the plug does or doesn't have, it won't, well - spark! Petrol is far more forgiving of poor ignition than is LPG. Jack |
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