V6 Stalling regularly LPG Problem?

[fatboysim]

Hi I am a newbie and have a serious problem with my V6 van, we have only had it 3 months or so and have had a LPG conversion done. The main issue is that it keeps stalling whenever the revs are low. This is a serious problem as it cuts out regularly. Any ideas. Would the LPG conversion be responisble for this in anyones opinion. I would like to get it sorted out asap as we are rapidly falling out of love with the Bongo that we were so excited to buy.

[bongodonkey]

There are a number of reasons that your V6 may be cutting out.

Most likely is the software on your LPG kit.

Basically a set temperature is programmed into 'toggle' from petrol to gas once the engine reaches that temperature. If the temperature is not set correctly (too cold) then the engine will stall at low revs until the engine reaches a warm enough temp - be aware when the ambient temp is very cold the engine will take quite a while to reach the temp and may still try to toggle across to gas prior to getting properly warm.

Or

The rate of gas that is programmed into the software is set to low - meaning at low revs (stationary at lights for example) - the LPG kit isn't letting enough gas into the engine to keep it at tick over.

Solution

Establish which LPG kit you have on your bongo. Find your nearest fitter (or go back to the seller for further info), and have the software on the LPG kit re-mapped to either cure the fault or at least eliminate from a possible list of why it's cutting out.

I normally have my software checked/remapped at least once a year (part of our annual service). Makes the bongo run more efficiently on gas and is better emissions wise. Also if the LPG kit has only done around a 1000 miles it should of also been back for a service/check out as well.

Normally a software check is either free (well it is when I've gone back to my fitter!), or at the least very reasonable. Find out the age of the kit, as you hopefully may find yourself still under warranty.

Hope this helps.

[bongodonkey]

Post your location on your avartar as someone local to you maybe able to give you some pointers.

[Jim the Box]

I have the same problem until the engine is FULLY up to temperature then it runs as normal. If it is still giving you problems after say
5 miles then it will need re-tuned. This normally needed done 1000 miles after installation anyway. If your plug leads are on the way out this also has an affect on lpg performance.

Jim...

[Simon Jones]

Take it back to the converters and get it serviced (usually 1000 miles or 1 month) and checked over. Mine switches over at about 40 degrees C and there is no difference in revs or performance.

First thing you need to do is establish if the problem is petrol, LPG or both. When it's warmed up it will switch over the gas automatically, but you can press the button on the control unit to revert it to petrol. If the problem occurs then it could be the idle revs are too low, blocked air filter or other ignition issue. LPG requires a better spark than petrol so it will highlight any weaknesses in the system. Did the converter give you any advice about what plugs to use or mention about reducing the spark gap slightly?

[mikeonb4c]

Hi I am a newbie and have a serious problem with my V6 van, we have only had it 3 months or so and have had a LPG conversion done. The main issue is that it keeps stalling whenever the revs are low. This is a serious problem as it cuts out regularly. Any ideas. Would the LPG conversion be responisble for this in anyones opinion. I would like to get it sorted out asap as we are rapidly falling out of love with the Bongo that we were so excited to buy.

If the conversion is only 3 months old and has been giving trouble, surely the installer will want to know and to fix it, whether under warranty or as a matter of reputation, even if it turns out that tired parts like HT leads (which you must reasonably expect to pay for) are to blame.

[New Forest Terrier]

If you had the LPG conversion done yourself' you should have been asked to take it back after 3 months or 1,000 miles as the conversion needs to settle down before remapping and final adjustment. If you had it converted before purchase go back to the seller. As Simon Jones says it should over seamlessly with no change in running. On a three month old conversion there should be no switching over problems.

The only really noticeable effects of a LPG conversion should be the lower fuel bills.

[mikeWalsall]

Topped up my Flash lube yesterday ... while I was 'in there' checking the auto box / engine levels ... I also pulled out the plug leads to check for any oil in the bottom of there 'tubes' .... but they where OK all clean and dry ..

Went out today .. and it seems as the engines low speed / stationery tick over seems marginally better .. as the sparkies are quite new, I tend to think it may be my plug leads 'breaking down' internally ..

[fatboysim]

Hi thanks for all the feedback, sounds like the next thing I need to do is to contact the company that did the conversion as we will have done 1000miles easy. We have taken it back there once already but sounds like needs to happen again.
I cant identify whether it is gas or petrol problem as it switches automatically and I have no idea when this happens, no way of feeling this.
Anyhow thanks, I have a feeling I will be back on here though!!!

[mikeWalsall]

When the engine is up to normal running temperature, with most systems it is easy to manually switch from gas to petrol and visa versa ..

Just press the white square button in the centre of the LPG contents leds ...



See if the symptoms disappear when running on petrol .. then reappear when you press in the button and revert back to LPG ...

[AeroNut]

I had this problem for a while. Just had the LPG retuned after having the Valvecare replaced with a Flashlube system.... The stalling....The installers put it down to my Lambda sensor being a bit erratic.... But since the retune the tickover is much more stable and the changover is smoother and doesn't stall......... I have noticed that the tickover when freewheelin... is higher than before so whether the tickover/fastidle has been increased....... whatever they have done it works.........

TJD