Thread: First time LPG owner. Bestow your wisdom on me please

Sorry I forgot to attatch these!

LPG CONVERSION | Mercer Industries | IMPCO BRC

Some questions,
is the LPG sequential injected?
Sequential will start on ULP and seamlessly switch to LPG.
Rovers dont like being cold and running on LPG.
If you bought it in QLD the car will have an LPG certificate, just worried about the tanks being in date.
Like any injector, they wear out. Good LPG ones should reach 100K.
You get more HP on LPG, but you use more, but its cheaper to buy.
Engines run better/cleaner/live longer on LPG than ULP

We had an LPG Wizard until recently... read old posts on this Forum, anything written by Bee Utey is gold.

There should be a shut off valve on the outlet of the tank.
The filter will be on the line somewhere,probably under the vehicle.

We had the same type of system on vans years ago,LPG is very touchy and doesn’t take much to upset it,so it won’t idle or run properly.
Air leaks are often an issue,on the inlet manifold somewhere,hose come off,perished,etc.
Even an air filter half blocked or leaks on the airfilter box causes issues.
Can’t remember ever having a filter block up,and we did millions of K’s in the vans over the years.
Changed converters regularly,they often didn’t last more than 150,000km.

FWIW,the later vans we went to Landi Renzo injection system,many did well over 300,000 Km with out one problem,so much more reliable than the old impco systems.

We ran petrol through them every now and then,whether it is necessary or not,I don’t know.Probably good to keep the fuel injectors clean,that is if yours is injected.Both systems always start on fuel,anyway.
We didn’t have any engine issues,burnt valves,etc ,either.

Originally Posted by Pedro_The_Swift

LPG CONVERSION | Mercer Industries | IMPCO BRC

Some questions,
is the LPG sequential injected?
Sequential will start on ULP and seamlessly switch to LPG.
Rovers dont like being cold and running on LPG.
If you bought it in QLD the car will have an LPG certificate, just worried about the tanks being in date.
Like any injector, they wear out. Good LPG ones should reach 100K.
You get more HP on LPG, but you use more, but its cheaper to buy.
Engines run better/cleaner/live longer on LPG than ULP

We had an LPG Wizard until recently... read old posts on this Forum, anything written by Bee Utey is gold.

Im not 100% sure but I don’t think it switches over. There’s a switch to choose what you want it to run on. I suspect that for lack of a better description it’s an ‘either or’ setup. If I start on petrol it doesn’t cut out. If I start on gas it cuts out and from the second start it’s fine.

That being said though there is a sticker that says keep petrol at atleast 1/4

Originally Posted by scarry

There should be a shut off valve on the outlet of the tank.
The filter will be on the line somewhere,probably under the vehicle.

We had the same type of system on vans years ago,LPG is very touchy and doesn’t take much to upset it,so it won’t idle or run properly.
Air leaks are often an issue,on the inlet manifold somewhere,hose come off,perished,etc.
Even an air filter half blocked or leaks on the airfilter box causes issues.
Can’t remember ever having a filter block up,and we did millions of K’s in the vans over the years.
Changed converters regularly,they often didn’t last more than 150,000km.

FWIW,the later vans we went to Landi Renzo injection system,many did well over 300,000 Km with out one problem,so much more reliable than the old impco systems.

We ran petrol through them every now and then,whether it is necessary or not,I don’t know.Probably good to keep the fuel injectors clean,that is if yours is injected.Both systems always start on fuel,anyway.
We didn’t have any engine issues,burnt valves,etc ,either.

Thank you. Looks like I’ll get it on ramps this weekend and have a look! Someone suggested I just remove the paper filter and leave it off! 😂

Originally Posted by Pr0ko

Im not 100% sure but I don’t think it switches over. There’s a switch to choose what you want it to run on. I suspect that for lack of a better description it’s an ‘either or’ setup. If I start on petrol it doesn’t cut out. If I start on gas it cuts out and from the second start it’s fine.

That being said though there is a sticker that says keep petrol at atleast 1/4

The switch is for LPG or petrol.
Petrol is just that,petrol.
LPG,it should start on petrol and switch over once engine has warmed up,never seen them start on LPG,under normal operation.

I can’t remember what happens if fuel runs out,on the Impco set up,i think there is a sequence to start on LPG even if cold.There is on the newer LandinRenzo system we now have.

FWIW,we have now gone away from LPG,as it is difficult to get these days,and often rediculously expensive.Only have one van left that runs on it.

I've had a few RV8s on LPG over the years and I used to wind up the (ign) advance to crazy numbers to get some power/economy from them. They can run fine if tuned properly.

Going from Pic #1, it's not an injected install. The mixer can cause issues over time too.

Another thing I used to do religiously was to change plugs at every service(about 10K or sooner).

It was scarey watching the short term fuel trims go from 98ULP to LPG.. the software screen limit was 33 and it hit that quick!! but then mine would ping on 95...