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Can I run my LPG tank 'dry' ?

Tech Talk for Nissan owners.

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Can I run my LPG tank 'dry' ?

Post by Draven »

Before anyone says it, I know that lpg is a 'dry' gas :P

I have just scored myself a nice GQ on gas, but unfortunatley the LPG gauge doesnt work, I was wondering if I could just run it till it runs out of gas? I know this isnt good for a petrol system as it sucks all the crap of the bottom of the fuel tank, but would the same problems arise on the LPG system ?

Any ideas would be great,

thanks all
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Post by bazzle »

Yup, just run it until when you accelarate nothing happens, then sw to petrol on the move. Normal way to do it, means your running on gas/gas/ not liquid/gas....

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Re: Can I run my LPG tank 'dry' ?

Post by Rainbow Warrior »

Draven wrote:Before anyone says it, I know that lpg is a 'dry' gas :P

I have just scored myself a nice GQ on gas, but unfortunatley the LPG gauge doesnt work, I was wondering if I could just run it till it runs out of gas? I know this isnt good for a petrol system as it sucks all the crap of the bottom of the fuel tank, but would the same problems arise on the LPG system ?

Any ideas would be great,

thanks all


Never caused a problem doing this in my workvan every week for 3 years, a good tip is to drive a few km then park it on petrol one night a week to keep the carby seals moist, also makes clutch starting possible if you have a flat battery as some LPG systems won't bring in the gas solenoid until there is engine vacumn up.
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Post by becky »

Chad has had gas only on his jeep for the past 10 years & has never had any probs with any seals, or anything. Runs out of gas frequenty because he has never had a gauge. No probs there. If you have a flat batttery, his gas system has a 'purge' valve thingy on the condenser(?) thingy which you push to put more gas into the carby & you can clutch start as normal.
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Post by V8Patrol »

Running the tank dry has no side effects at all.
The only word of warning I'd give tho is....

When you switch from LPG to petrol with a warm motor there is a chance that the carby float will "implode"....IE crush itself inwards !!. This will cause the engine to flood from the excess of petrol.

Relax there is a soloution.... fit a neoprane float, most LPG conversion shops do this right from the word go ...some dont... so it would pay to check that you have a neoprane float in your carby.

Holley carbys are extreamly renound for this imploding float problem that was untill they made the neoprane float to suit. :cool:
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Re: Can I run my LPG tank 'dry' ?

Post by Wendle »

Draven wrote:Can I run my LPG tank 'dry' ?


I just did this accidently because my guage is no good either. no worries at all.. :D
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Post by Draven »

Thanks for your help guys!

Ive just found out that my LPG tank is outa date and have to get it re-tested so, im going to run it out and take the tank out myself , and then run it down the the test facility. HOPEFULLY it will pass. Ive been told conflicting stories about tanks passing there tests, and I dont feel like buying a new one :)

Has anyone else had there tank re-tested before?

BTW, I have a Stainless Myttons LPG tank.

Thanks agian.
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Post by MKPatrolGuy »

Draven wrote:Thanks for your help guys!

Ive just found out that my LPG tank is outa date and have to get it re-tested so, im going to run it out and take the tank out myself , and then run it down the the test facility. HOPEFULLY it will pass. Ive been told conflicting stories about tanks passing there tests, and I dont feel like buying a new one :)

Has anyone else had there tank re-tested before?

BTW, I have a Stainless Myttons LPG tank.

Thanks agian.


Got mine retested, passed fine even though as I found out the AFL valve doesn't work :?
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Post by ORSM45 »

in the process of getting mine checked, wont be ready til early next week.
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Post by Swerve »

How much are people paying for tank inspections ?
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Post by Jacked »

MKPatrolGuy wrote:
Got mine retested, passed fine even though as I found out the AFL valve doesn't work :?
We pull the valves out on purpose and only do a full fill when heading out the bush and need some decent range. The car is never parked with a full tank.
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Post by jessie928 »

Draven wrote:Thanks for your help guys!

Ive just found out that my LPG tank is outa date and have to get it re-tested so, im going to run it out and take the tank out myself , and then run it down the the test facility. HOPEFULLY it will pass. Ive been told conflicting stories about tanks passing there tests, and I dont feel like buying a new one :)

Has anyone else had there tank re-tested before?

BTW, I have a Stainless Myttons LPG tank.

Thanks agian.
it will cost you more than say a APA tank, because mytons have a multi function valve/guage/fill system.

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Post by jessie928 »

Jacked wrote:
MKPatrolGuy wrote:
Got mine retested, passed fine even though as I found out the AFL valve doesn't work :?
We pull the valves out on purpose and only do a full fill when heading out the bush and need some decent range. The car is never parked with a full tank.
thats nice information to post on the internet :)

But, for all intents and purposes, before AFL you could do this on all tanks :D

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Post by coxy321 »

Draven wrote:Thanks for your help guys!

Ive just found out that my LPG tank is outa date and have to get it re-tested so, im going to run it out and take the tank out myself , and then run it down the the test facility. HOPEFULLY it will pass. Ive been told conflicting stories about tanks passing there tests, and I dont feel like buying a new one :)

Has anyone else had there tank re-tested before?

BTW, I have a Stainless Myttons LPG tank.

Thanks agian.
I've had three tanks retested, all passed no worries. Cost is $140 for a four port tank (APA) and between $200-$300 for a multi-valve tank.

I used to run our AU wagon's gas tank dry every time - no dramas. I have recently ran the tank dry on my new falcon 3 times with no dramas. When the gas runs out at freeway speed or similar, you can back off the throttle and drive it for another 30-40km as it gradually runs out.
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