I have a 1982 E150 dayvan (5l V8) ... I'm in the UK
Not sure if you have it in the US .. but I've just converted it to run on LPG (what we call gas) as it's half the price of petrol (what you call gas!)

I'm having a bit of trouble setting it up tho... I can't decide if it's running too rich or too lean.
it revs fine on no load and accelerating gently is fine... but if it comes to going up a hill it just can't do it.. and if I use the kickdown it just makes more noise and doesn't go any faster!

TIA.

 

Can you describe the system for me? Ex model numbers or manufactors name. It sound like whomever did the converison didnt set the full power (load) adjustment properly.
Regards

 

I did the conversion

It had a sprint gas (austrailian) mixer on the top of the carb and then a twin chamber reducer/vapouriser which I forget the brand of but you can see in this pic
http://easypichost.com/katym609/econ...4/DSCN0979.jpg
(I realse it should be mounted 90deg. to that really)... think it was made by an italian company... veglisomething iirc

There was a restrictor between the reducer and the mixer but I took this out when I was sure it was running lean... as putting tape over the air filter made it rev cleanly under no load ... but now I just can't tell.. it seems to be fine under no load over a wide range of adjustments... with or without the tape... but under load it just doesn't work!

 

Well you may have a incompatilbility problem, Most times equipment from two different manufacturs will not work together. If this system came form another vehicle was it working on it? If so what size motor was it. Does the exhaust smell like raw gas?
I think you will need to put some kind of a "load" adjustment between the vaporiser and the mixer. I am well versed in IMPCO and Century equipment but I am unfamilar with what you have. I will do my best to help you out

 

I read somewhere the sprint gas mixer said it worked well with the vapouriser ... all the stuff was new and was bought as a kit.

http://www.sprintgas.com.au/artbin/mixer.jpg

yeah.. just ready on the box it reccomends use with an omvl r90 converter
http://www.fesautogas.co.uk/omvl5.jpg
...looks like the one! .. said it was good for up to 7 litres

The guy I bought it from has a gas analyser so can get it right with that... but I will have to pay for his time so wanted to get it nearly right myself first.

The only thing between the vapouriser was a plastic connector that had a screw down thing on the top to restrict the flow.

I sometimes smell the gas in the exhaust ... but it's not a strong smell.

Thanks for any help!

 

The plastic connector would be your load adjustment. If its not in put it back, then play with it. You can load the engine some by turning the wheel all the way to one side and hold it if you have power steering and you can power brake it but use extreme caution when power braking. Once you have it close then you can road test.
Is this a bi-fuel set up?

 

yeah it's bi-fuel.

I looked at the load adjuster and it was all the way out and read somewhere that if it was lean to remove all restrictors ... and I assumed closing it would restrict the fuel more... is that right or is there some weird gas effect that does the inverse?

I tried powering with the brake on earlier... wasn't too sure if it was doing it any good!

I'll put it in back tomorrow and see what difference it makes... too dark now!

 

If it is lean removing it was the best. But if it is to rich you need some way of restricting it
Good luck

 

hmm.. not sure now!
It was definatley lean with it ... but now without it I'm not sure which it is!

 

I assume the truck ran good on gasoline. Have you advanced the timing? Propane is alot like hi octane fuel it needs a high initial advance then limits on the total. We use a unit built by MSD's parent company called dual curve. It allows you to advance the timing so it runs well on propane but then retards it when you run gasoline. An 82 wouldnt need any more than that.

 

yeah.... running fine on unleaded petrol (95ron) ... not sure if it had any adjustment to run on that... it was in Germany from 1991 until january this year so expect if adjustments were needed they would have been done.

it did cross my mind that it might be a timing problem but didn't want to think about it as the solution would be difficult or expensive

 

Not really. You can advance your timing to about 14 deg BTDC and get by with it. But be careful if you run gasoline as it will ping

 

Not sure how that's done meself.. but I'll find someone to check it.

Thanks for your help.

 

[QUOTE=tlh858]I read somewhere the sprint gas mixer said it worked well with the vapouriser ... all the stuff was new and was bought as a kit.

http://www.sprintgas.com.au/artbin/mixer.jpg

yeah.. just ready on the box it reccomends use with an omvl r90 converter
http://www.fesautogas.co.uk/omvl5.jpg
...looks like the one! .. said it was good for up to 7 litres

QUOTE]

I have a econoline with the 5.0 L (302) engine and this uses the OMVL converter; this is combined with 2 venturies in both inlet hoses to the throttle body.
Runs fine
The mixer in your picture looks a bit like the Impco to me (300)
the OMVL should be large enough for this engine.
Do not understand what your problem is, bus as already said, the advance should be more on lpg , but watch for knock on "petrol" as you call it, when pushing it.

Another thought:
Have you got your waterlines running correctly: if the converter is not heated up right, and the engine comes under load (running uphill, your first mail) then you will just not have enough fuel,as insufficient fuel will vaporate.

Cor

 

yeah... I whacked the advance up (by ear) and stuck a bunch of gaffer tape over the air filter as it was still lean and it seems OK now.