Quote Originally Posted by quan2boy View Post
Question lang. How often do we need to have our LPG system serviced?

I just noticed that every 1 or 2 months, my engine would stall immediately upon switching to LPG (either via the auto-switch at 2000rpm or pressing the button). When I bring the car back for service, Greenfuel will almost just clean the filter and the car would be ok again. Any ideas? You guys experience the same? Hassle din kasing magpabalik-balik sa shop that often...

Thanks in advance.
It is likely you are getting an intermittent sticky Valtek rail injectors due to oily LPG contamination. One sign that your Valtek rail is failing was the rubber hose from the reducer/condenser to the injector rail was slightly bulging (medyo maga).

If you will notice, once they service your kit; they will remove the hose going to the rail and at this instance the actuators will get rested and will flex back to its original position, freed from getting stuck. Filter cleaning will also help, but it seems base from my experience, hose dismantling and re-installation alone helps restore injector's pistons to normal positions.

Another sign that you are getting oily LPG was your spark plugs will have black carbon deposits. A clean LPG fed into the engine will yield only powdery white deposit on the spark plugs.

Note: Slowly bleed bulging LPG hose before removal by loosening the clamps and slowly rotating the hose back and forth to avoid loud gas pressure noise.