Quote Originally Posted by n5110 View Post
question lang po:
1.0 has anyone tried using resistor type plugs? if yes does it improve your lpg performance?
2.0 how about iridium and other type of spark plug aside from the plugs recommended by OEM. may nakagamit na ba and does it also improve your lpg performance.

reason for the question:
im using lpg for almost 5 months now with stock plugs * 7K km running on lpg. the problem now is when the car is idling without AC, nag ddrop and RPM to the point na mag stall na yung kotse. during the first 3 months naman hinde ganito.

as recommended by greenfuel yesterday (alvin) try to replace the plugs with resistor type or the 6pbs type. i want to check with lpg user first para malaman kung may significant impact ba ito otherwise i will stick with the stock plugs. Thanks.
Resistor plugs are also recommended on any vehicle that has other on-board electronic systems and as a rule, performance is in no way impaired by resistor spark plugs. Best to consult your vehicle specification booklet or search it via Internet.

Toyota Innova stock spark plugs uses (R) resistor type spark plugs (Denso K20HR-U11) because it has OB electronic system. Furthermore, I have been using one step colder Iridium (Denso IKH22 also resistor type) now running more than 10K++ kms with no hesitation and the engine runs a little bit colder too. I see not much difference using Petrol or LPG, but engine runs smoother on LPG

The only consolation of using Iridium and one step colder was extended life of the spark plugs, if you are comfortable with your stock plugs then just replace them shorter than normal schedule.