Idling is a real big problem, that was only few months after installation. The car can even die when change from N to D... Wth... But after went back to the installer few times then got the right idling RPM dy. Because need to achieve a balanced idling RPM to accomodate both gas and petrol settings. When use NGV, idling RPM less than 1000RPM, but when I switch back to petrol, idling is a bit more than 1000RPM. Gotta find the sweet spot so that it is high enough for NGV but low for petrol. So if I use petrol memang minum petrol macam air.
Now my parents are adjusting theirselves if the idling RPM lari. I was informed that the RPM can easily lari if still insist to press pedal on nearly empty gas tank. The car goes jerk jerk like kehabisan minyak when the gas tank is empty, then I switch to petrol and Voila, I seemed like turbo-ed the 1.6L 4G18 power.
I was also informed that if i go for a car battery change, i will need to go back to the installer and retune ECU for free. (Although now closed down dy). But few months ago after I changed the battery, what needs tuning is only adjusting the idling rpm. If not the idling would be very very bad...
Is injectors + Spark plugs? Both installer and service foreman claimed that spark plug wore out faster. I didn't ask my parents about spark plugs yet, but last time the spark plug change is like 1.5 years dy. The only problem is the 3rd spark plug cable kept on too excited and jump out only. To maintain those valves, I will sometimes use petrol to lubricate the parts, hope that it wont spoil so fast..
If the tuning on the NGV is right u shouldnt felt the power lost so much... are u running on sequential system or mixer NGV? if sequential system u can tune the RPM very stable... So far i tune so many taxi last time is ok now no more time to do however i can show u where to do it...