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V8 LPG (emmegas) led level indicator


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Just purchased a v8 110 that has been fitted with a 3.9efi unit ,

This has in turn been fitted with an emmegas LPG system.

The engine is running as sweet as a nut on gas but the switch over unit is constantly showing the tanks as empty(red light is on)Put 50 litres in it yesterday?

Any one got any suggestions.

Secondly,its seems to start on gas and run well but if you try and run on petrol it doesnt want to know.

Are these issues likely to be a big specialist job or something I can resolve.I dont have a user manual for it either.If anyone has one and could send me a copy that would be great.

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My 90 runs on LPG too, and has an LED indicator on the LPG/Petrol switch which I must say when working is carp! I rely on the odometer for knowing when to fill up with LPG - don't let the petrol tank get too low so you have that as a back up should you run out of LPG.

However after removing the tank for chassis repair, upon refitting the level indicator worked (for a while) so maybe it was just a bad contact? - there is a very small multiplug near the valve on the tank that I guess was disturbed during removal/refitting.

As for the problem on petrol, if it runs fine on LPG then you can rule out the ignition system. Ignition faults will be present on both fuels and probably more so on LPG. So there's a good chance your problem is with the fuel system. HTH

I'm sure someone who knows what they're doing will be along shortly to give you more advice (and correct me)....

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What carbs does it have? Running on LPG for extended periods of time without ever using petrol can dry out the seals in the carbs and give you running problems...

My tank has a gauge on it, as well as the lights on the dash- yours might have something similar? That way you'd know the sender is (or should) be working.

As Spearos said, the level indicators are never very good anyway so I also use my trip counter to determine when i need to fill up.

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Whoops- missed that bit! :blink: :blink:

I havent dabbled with EFI yet (its on the list of things to do).

Fridge or HFH will be along at some point. I would suggest checking the tech archive as there are flapper & hotwire troubleshooting docs in there under the "manuals" section.

Good luck :)

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By "it doesnt want to know." do you mean that it won't run at all or that it runs but poorly?

I think that you need to forget the gas and just look at this as a petrol running problem.

Of the top of my head:

Only common system to LPG and petrol is the ignition so you are getting a spark, but LPG needs a different advance curve to petrol so if it is running well on gas odds are the advance is wrong for petrol.

Other than that - anything to do with the petrol side of things could be the problem - blocked filter, old fuel, low pressure, kinked pipe, blocked injectors, non-functioning injectors etc etc etc.

One more thing that just occurred to me - check that the gas is switching off when you select petrol.

HTH

Roger

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Just purchased a v8 110 that has been fitted with a 3.9efi unit ,

This has in turn been fitted with an emmegas LPG system.

The engine is running as sweet as a nut on gas but the switch over unit is constantly showing the tanks as empty(red light is on)Put 50 litres in it yesterday?

Any one got any suggestions.

Secondly,its seems to start on gas and run well but if you try and run on petrol it doesnt want to know.

Are these issues likely to be a big specialist job or something I can resolve.I dont have a user manual for it either.If anyone has one and could send me a copy that would be great.

Have a look at the lpg tank. There should be a secondary display level that will need adjusting when your tank was filled. Some need twisting to the left.

Second have your petrol checked when you bought it, was it nearly dry the tank As the fuel could have degraded without constant use. it needs to run on petrol first to allow the lpg to warm up .

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The tanks have been fitted in place of the original tank (at the rear).There are 2 of them approx 50 litres each i would suggest.

Where is the secondary gauge likley to be?

It appears to be starting up on gas not petrol.The petrol tank is fitted under the drivers seat.

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My son is an LPG Autogas specialist.

We are based at St. Helens.

I / we am currently fitting a 3.9 into a 110 County, and would be interested to see how your has been done and finished.

If you fancy bringing your vehicle over to our workshops you can have 1 hour of Martins time for FREE, mean while I'll be drawing inspiration from your vehicle.

PM if you wish to take up the offer.

webbersdad

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The tanks have been fitted in place of the original tank (at the rear).There are 2 of them approx 50 litres each i would suggest.

Where is the secondary gauge likley to be?

It appears to be starting up on gas not petrol.The petrol tank is fitted under the drivers seat.

Follow the gas lines to the tank or electric cable. This mine on my single tank on the inside.

The last one has a adjustable display.

post-8867-0-29439500-1300036780_thumb.jpg

post-8867-0-61992000-1300036796_thumb.jpg

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I have had a chance to have a look underneath to day and upon cleaning the area around each tank,I can now see a gauge on each tank.Both showing empty though?

Not to sure whats going on .Put £30 of gas in before collection.Only done around 100 miles.The LED gauge was showing red after the gas was put in,That still hasnt changed either.

I take it the tank gauges work on pressure alone,what I mean is they dont require power to show a reading on them?

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I have had a chance to have a look underneath to day and upon cleaning the area around each tank,I can now see a gauge on each tank.Both showing empty though?

Not to sure whats going on .Put £30 of gas in before collection.Only done around 100 miles.The LED gauge was showing red after the gas was put in,That still hasnt changed either.

I take it the tank gauges work on pressure alone,what I mean is they dont require power to show a reading on them?

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The gas tank contents gauge doe not work on pressure.

There is a float which drives the gauge finger via a magnetic coupling.

Behind the gauge face is a series of resistors, each resistance equates to a level indication on the facia switch.

webbersdad

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So there should be a power feed to the gauges.

From looking initially,there only appears to be wiring going to the O/S/ tank.The gauge on that side has a small loom comming from it which has a push fit connector .From the connector thew loom appears to go to the front of the vehicle,to the switch and LED gauge I assume.

I must say that the short loom connector looks a bit crappy to say the least.

If I get a multi meter on the loom then there should be some kind of feen to at leat one of the wires?

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So there should be a power feed to the gauges.

From looking initially,there only appears to be wiring going to the O/S/ tank.The gauge on that side has a small loom comming from it which has a push fit connector .From the connector thew loom appears to go to the front of the vehicle,to the switch and LED gauge I assume.

I must say that the short loom connector looks a bit crappy to say the least.

If I get a multi meter on the loom then there should be some kind of feen to at leat one of the wires?

If you can see the gauges and they look empty. Try and unscrew slightly if similar to my pictures two retaining screws so that the dial or display can move to left or right. You may need to keep the engine running on gas for the display to constantly read and have someone call the increments level rising. When you filled up last did you stop when full or before. As if you can adjust the dial then set for 3/4. :)

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