LPG Discussion Forum

Hi
Thank you for replays, the engine is a v6 3.5l m272 Mercedes, "variable" (long/short run) manifold, "long" distance from the petrol injector to the intake valves.

Anyone?

I change my filters gas/liquid twice per year.

Hi
I have my car running on LPG for a few years.
Not a big deal but can you please tell me is the length of the intake hoses are ok?
Will I gain anything if i try to make them shorter?
Doing this is kinda problem as space is limited, any suggestions?
https://imgur.com/a/iiNTlmu

https://i.imgur ...

Mine stats are :
3.5l engine on passenger car not van,
34085 miles on lpg, average consumption £12.5l/100/km or 23mpg and 0.119pence per mile

@Gilbertd and @LPGC
On slk 280 yes it has the same ecu me9.7 like my slk 350
If the ML has the same ecu yes, if it has me2.8 then i need to ask the guy who did mine and charge me £60 for the mode.
As you can hear mine in only mild pops not extreme and if you drive normal they are not there, mine are ...

Hi
Yes is my car in the video. This is me flashing the ecu in my very "spacious" garage.

Finally, I found someone able to do this on my car, this is on LPG
https://www.youtube.com/watch?v=DltUgADUeoE

Yes, had mine done a few days ago.

I paid £8.80 for one bosch double iridium 0242140515

Thank you!
So in theory lpg will be safer for pop and bang as petrol at least for the bores.
Now i need to find someone capable of adding this mod on my petrol ecu map.

So you reckon that the lpg gas will be ignited in the hot exhaust and will crackle/pop as the petrol? In theory, lpg or petrol will be gas, not liquid coming from the cylinders?

"“Pops and bangs, or burbles as the OEM call it (yes, it’s that common on production cars that even the manufacturers have a name for it!), is simply a calibration feature within the ECU where we set up a specifically targeted, very lean misfire once you lift off the throttle.”

Normally on an ...

Hi
Fist anyone can tell me if this mod is safe ( gas will not wash the oil film on the walls?) on the engine?
Can this mod be achieved on lpg?

Hi
Mine is a mercedes slk 350 m272 engine, I am lucky that the spark plugs are very easy to access.
This April I change the spark plugs on my wife car c280 same m272 engine with ngk 4288. After changing mine with bosch double iridium 0242140515 and saw the improvement, I change them as well a few ...

No, for my engine they do only platinum, but they mention reducing the gap. I was afraid of doing that.

I am sure this has been discussed but I want to share my personal experience.
So far in 6 years ( 4 cars converted on lpg ) i only used NGK spark plugs double platinum 0.8mm 3mm spark
One month ago i was looking to renw my spark plug and saw that bosch double iridium 0242140515 0.7mm and 4mm spark ...

Is such a shame that is dead i am using it quite a lot filllpg.

Yes the LTFT reaches 7% during driving, if I switch off the engine and put the key in the ignition I can read the LTFT properly.
So if with the engine running LTFT is all over the place with the engine off I can get the exact value.
Before converting to LPG the LTFT is was 3.1% on both banks, I am ...

I was joking, I did that for the sound.
Standard the exhaust is quite so doing that it makes it louder. I start by removing the baffle but it wasn't much louder so I went with cutting the bends in the back boxes and put flex pipe in there.
https://imgur.com/a/7qAyb9b

Cold start
https://www.youtube ...