Club 80-90 Forums

JamesKT25 wrote:Why would anything in the system before he introduction of the LPG effect it?

Think of lpg as petrol
It requires a 14-1 mix with air to make it explode with maximum gas expansion.
MIx in too much air and the explosion is not efficient.
So air leaks are not part of the constants that we can adjust

JamesKT25 wrote:Why would anything in the system before he introduction of the LPG effect it? Is it because the LPG relies on the vacuum in the intake to pull it down through the carb? the vacuum pipe from air box to carb had split so blanked that at the carb. should I replace it?

LPG delivery is very sensitive, even if you put your hand over the airfilter inlet it will stall, it won't do that on petrol

blanked off vac pipe to airbox is fine.

Have I made things harder for myself trying to start it with the air box removed then? I have the pancake on top of the carb but left the airbox off so I could get my fat hand to the vaporiser adjustments.

You see why it's important to tell us everything.

yes put the air filer assembly back it wont run without it on lpg but will on petrol.

Ah...

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Oh

As you recorded all the previous settings you can now put it back to where it was.

I had it on at first, but took it off after I started having problems to make access easier, didn't realise the effects to be honest

Feel daft now. completely overlooked it.

JamesKT25 wrote:Feel daft now. completely overlooked it.

Nah you didn't know ...but now you do.
All part of the fun

Spent so long playing with petrol carbs without an air filter I thought nothing of it. I shall stick all the original air housing back on instead of my cold feed one and reset the vapouriser and go from there

Right, airbox filter and pipework all back to how it was.

Opened the boot of the van, out blows my paper with my flat counts for the vaporiser settings. Straight off into a near by field. Awesome.

So, I've set the powervalve to 80% open approx. Bypass to zero and on the bias I have worked up from zero to 14 flats trying to start every second flat. And no luck. Got the odd splutter but nothing

Deffo got the lpg switch in the right position?

Have you filled and started on petrol to eliminate the intermittant dizzy connection?
I'd run on petrol then change over when warm, easier to get it idling warm, then tackle cold.


when you say trying to start what are you doing?
mine won't start without my foot down on the accelerator, mine it's easier to start with some idle bypass

Deffo on Lpg, it's spluttered a couple times on Lpg so I can assume there is a spark. Although not sure how healthy or reliable. I'm gonna have to get some petrol in it and get it warm on petrol and try from there.

It used to start in any weather condition I've tried it on from cold on LPG.

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It fu#!@?g runs! Went back out again. Set the bias to 12 flats and the bypass to half. Vroom!

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