LPG overfill AFL prob's

[sudso]

The last 2 out of 4 times I filled up with LPG the auto shut off didn't work.
The second time was yesterday. The filling slowed right down so I had a look at the gauge on the tank and it was at 100% capacity.

Interestingly, it started doing this 2 weeks ago after having my dented long range petrol tank replaced with a new one.
I cant see how that would affect the AFL but it seems a bit strange........you know.....you take your vehicle in for service and it comes out with another problem

Anyone know what could be wrong?

[bad_religion_au]

i don't know, at alot of the servo's i've been going to there has been a poster up about dodgy auto shutoff valves. maybe yours is one of the defective ones

[sudso]

badreligion wrote:

don't know, at a lot of the servo's i've been going to there has been a poster up about dodgy auto shutoff valves. maybe yours is one of the defective ones

Nup. Mine isn't the ones listed on those notices and it's only 5 years old so it hasn't had the 10 yearly yet.

At the moment I'm tossing up between a defective AFL valve or the main supply tanks where I filled up were very low and the low and slow filling pressure didn't activate the valve but I thought that wouldn't have mattered, being a safety valve and all.

I'll get it to the gas tech. this week hopefully to get it checked anyway

[V8Patrol]

Slow filling is quite common usually..... but ..... its usually a problem we see in the hotter months.
The LPG remaining in the tank has a higher pressure in a hot enviroment and then when you try n add extra LPG the tank pressure is usually higher than the servo's tank pressure leaving the bowser pump to do all the work.....this is why its slow to fill on a hot day when the car is hot.

Once around 15% of the cars capacity has been filled the incomming LPG has by then cooled the existing LPG and the fill rate increases ...... obviously the more LPG that enters the cooler the tank gets and the faster the flow rate is.

The opposite can occour aswell...... being that the servo's tank may be low in quanity and therfore the pressure in that tank is very high ( 210psi, 110psi is normal from memory ), in this case the tank fills really fast but slows to a crawl after around the 70% mark.

As most of you know we recently did a charity bash up through central Aust....... on a few of the days we encountered 40degree plus days ..... filling up mid afternoon meant standing next to the car for 15mins to add the 140lits of LPG..... at one stop we watched for 85seconds to see ONE lit of LPG go in ( that happened @ Curtin Springs and it was 48 degrees !! )


Best option is to fill up in the early morning, servo's tank is cool as is the one in the car........ I'd be trying that before I took it to the LPG Dr.
Auto fill limiters ( AFL ) are a mechanicle device thats fitted internally..... I doubt that the petrol tank man that fixed your other problem could have interfered with it at all.

Kingy

[sudso]

V8 Patrol wrote:

Best option is to fill up in the early morning, servo's tank is cool as is the one in the car........ I'd be trying that before I took it to the LPG Dr.

Thanks for that mate. It's always interesting to see what similar problems are around.

As for filling up, it was in the cool of the evening both times when the AFL didn't work, at different times, different servo's.
It filled slow right from the start on both occasions.
Someone suggested to me it might be a problem with the filler connection on my rig as the same thing happened to them and that was the problem.

I always thought the AFL worked regardless of pump pressure or am I wrong?