Help Engine pinging on innova vvti

[bratski]

Maybe it's an issue with your fuel tank? Fuel starvation on a low tank or a pump issue? What was the fuel level when it started pinging again?

i dont usually let the fuel level below 1/4.the pinging occurs occassionally whether at full tank or half tank, however i noticed that below the 1/2 mark the pinging occurs more often and when the car is driven for about over an hour in stop and go traffic traffic. in driving short distances and less traffic routes, i hardly notice any pinging.

[niky]

Fuel pump or filter then? Might be that your fuel is getting too hot... You really ought to get a diagnosis at the casa...

[bratski]

^^will do sir niky, kaso saan ba ok magpa service na casa, ive had bad experiences na sa mga toyota casas, it took me 10 years din bago ako bumili ng toyota because of this. meron bang shops sa banawe area that are adept at checking?

[bratski]

follow up question, i remembered that i recently checked my plugs and let my mechanic put it back, maybe he didn't screw it tight enough...so:
1.can a loose sparkplug cause pinging?
2. if water is present in the fuel tank, can it also cause pinging?

[vinj]

Try to have a computer check on the engine, one probablity also is that the ignition timing may not be set to spec. What plugs are you running now? Did you try running colder plugs? Try also cleaning the sensors if needed (O2 and the intake sensor).

[bratski]

Try to have a computer check on the engine, one probablity also is that the ignition timing may not be set to spec. What plugs are you running now? Did you try running colder plugs? Try also cleaning the sensors if needed (O2 and the intake sensor).

first thing i did after acquiring the unit was clean the intake sensor using spray on electrical contact cleaner. before cleaning i havent experienced any pinging sound, maybe i need to reset the ecu first? as i remembered i did not remove the battery cable when i did the cleaning.i just unplugged and plugged the intake sensor during cleaning.i havent got the chance to change the sparkplugs yet, its on stock plugs as of now.reg the 02 sensor i havent the slightest idea how to clean it as i dont know what it looks like hehehe

[bratski]

update:
i just checked my maf sensor a few days ago and blew compressed air in it. i reinstalled the maf and voila! no more pinging sound hehehe. i guess when i cleaned my maf using electric contact cleaner a few weeks ago either i didn't let it dry thoroughly, or maybe installed the maf incorrectly as i noticed that i could easily remove the sensor(pretty loose after removing the screws), i suspect that a little air must have entered thru the hole which confused the ecu into leaning out the mixture..hence the pinging sound.(i hope i know what im talking about as i myself am confused hehehe). but whatever it is i did, im just glad that everythings back to normal now. just for good measure, i filled up with petron xcs a while ago(from the usual petron unleaded)