Idiots guide to setting up open loop single point system needed

Morning all,

well the 300tdi has been mothballed and Ive picked up a NAS 3.9 Disco 1 to tide me over until i can get the the old dog back up and running but the problem is the lpg system, it had been stood for 9 months or so before i got it and although I now have it running sweet on petrol I'll be buggered if i can get the thing to run well on gas.

No i must admit i may have twiddled and fiddled with all the twiddley fiddley bits on the gas system, so does anybody have a easy to follow walk through or some advice on where i should start with this?

As a starting point i have so far:
new dissy cap
new rotor arm
new HT leads
new plugs
new air filter (the old one was near enough see through!)
cleaned stepper
cleaned the MAF


it runs well on petrol but by christ its thirsty, the gas tank is full and all the solenoids are working fine, I can get it to idle and rev on gas but as soon as i put it under load it stalls out, Ive had no backfires through the air side so im pretty sure its not running too lean, which to me says rich and hence the lack of power when trying to move.

But just twiddling is getting me nowhere quick and i would really like the thing to be running on gas so i can actually use the sodding thing for more than tootling about town.

Ive read up on as much as i can about setting up systems on the net but some real world advice from those that have similar set ups would be cool and very much appreciated, if you need more info on the system or piccys just let me know and i will do some tonight when back home.

TIA

POL

bum pity bum pity bum p

DiscoPol said:

bum pity bum pity bum p

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Bum bum bum.
Does sound rich. Can you get it on an exhaust gas analyser and get the hc down.
Could also be late spark
Needs to be at the very least 5 deg btdc, preferably more. Probs get 8 safely without pinking on petrol, every ones different. With a dual timing processor, I've had 18btdc on gas and processed to 10 on petrol

I must have missed your title in recent posts, maybe you should have made it
LPG wtf

cooltide said:

I must have missed your title in recent posts, maybe you should have made it
LPG wtf

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Well I have the thing purring along nicely now, it was indeed a WTF moment,

It turned out to be a touch of advance needed plus a fresh OEM dizzy and rotor arm, I cleaned out the gas reducer it was mucky as fook in there and added a bloody big jubilee clip around the gas ring in the intake as it seemed a bit sloppy in there hence allowing air to pass round the ring not through and so not really creating much of a venturi.

i dont know which of these fiddles fixed it in the end, but between them all it is running like a trooper now so all that remains is to fine tune the mix and power valves to get to a point where the ooomph is still there without the ouch of filling up too often.

Cheers for the reply @cooltide, im just hoping that this is the start of some cheapo V8 lovliness.