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stay without it angus.
You'll be happy.
I've had 2 D1's with old style lpg conversions.
Never had any problems with either of them.
Had them both for close to 100k's, sold em around 200k.
Never had any problems with the lpg, never one backfire!
Never ever did I have to touch the ignition.
This is a D1Quote:
Originally Posted by bee utey
https://www.aulro.com/afvb/images/im...10/04/1704.jpg
And it had all the trouble under the sun with backfiring. Note the location of the crankcase breather!
This is my RRc
https://www.aulro.com/afvb/images/im...10/04/1705.jpg
It has never had a problem with backfiring. Note the capped crankcase breather port in line with the oil filler cap. Now note the re-positioned breather away from the LPG mixer ring.
If it's not the crankcase port then it's a problem with the Impco systems.
Are these something that can usually be easily moved around and reassembled? I wouldn't have thought so...
Backfired again last night after running pretty rough for a while, it sure doesn't fill me with a lot of faith yet. I'm hoping to change that soon!
Both the above engines are mine, on the Range Rover it uses a LPG converter and a separate mixer ring attached to the end of the plenum. I had to get the stainless steel port manufactured. You can see it about 3" away from the mixer ring.Quote:
Originally Posted by Young Angus
The Impco system I don't like and it will be soon converted to a Sprintgas converter (or similar) and mixer ring the same as the Range Rover. Yes it also will be getting it's crankcase breather port moved.
Diana
Well I finally got round to replacing all the plugs and leads with new Bosch gear. WR7DC+ for the plugs (came pre set at 0.8mm gap according to the box but I feeler gauge'd them and the were less than 0.76mm so I went with that) and Bosch leads and it made a difference straight away! It's still a tiny bit rough on idle so I might get a proper tune by gas specialists but not a hint of a backfire or any kind of the silly lurching/hesitating crap I was getting on gas before. It pretty much runs the same as petrol now so I'm a very happy camper with that...although it was a fair stretch to get some of the back plugs in and getting the new leads on them properly so my back was a bit sore afterwards but totally worth it ;)
So thanks for all the suggestions with that one, so far it looks like all it needed were a new set of plugs and leads! Also when I pulled out the plugs to check them a little while ago they were very black but still not that worn or anything...I've driven it a fair bit between then and changing the plugs the other day and when I pulled out the plugs they were still nice and clean so they didn't black up again which I thought must be a good sign.
Also when I pulled some of the old leads off the lead came off and the metal bit from inside the end of the lead stayed on the spark plug end...so there wasn't much of anything holding it in the actual lead. So they were a bit on the crap side...they were the 8mm Performance brand ones.
It might pay for me to set the timing again though because I remember when I did it the engine wasn't at hot running temp it was fairly cold...otherwise I would have probably burnt myself getting a spanner in there and turning the dizzy with my hands. Is it right that the timing should be set when the engine is hot? If so, does it make that much of a difference if you set it when cold or will it still be pretty much the same?
Either way it's great that the backfires and silly gas behavior has stopped for now, all due to some nice new Bosch plugs and leads :D