Air fuel ratio table/chart

[shamimcrcr]

Does anybody have Suzuki Liana or cultus efi air fuel ratio table/chart. Pls share it

[Hassan1991]

Air fuel ratio chart? Are you tuning it or something?

[shamimcrcr]

Yes its for tuning. Its a table or chart of pre-programmed air fuel ratio against engine RPM and load.

[Hassan1991]

Manufactures never provide that. You have to make one according to your setup.

[Hassan1991]

Or you need expensive software to pull the data from oem ecu. Then another to open that tune.

[shamimcrcr]

Hmm you are right

[supraman2jz]

There is no set chart or values for afr, every engine needs a different afr number at different load. The baseline stays the same yes, but every engine needs fine tuning to the table according to load, throttle input, amount of air and fuel coming in, etc.

[saad310799]

Can we check afr with an obd scanner ?

[Hassan1991]

If your car came with Wideband o2 sensor.

[saad310799]

And how to know that ?

[Hassan1991]

Service manual will help you.
Which car we are talking about?

[saad310799]

Fortuner 2015
Pixis space 2012

[supraman2jz]

All new cars (atleast in Pak) come with narrow band O2 sensor. You will need to get an aftermarket AFR kit (gauge w/ sensor) if you want to monitor your AFRs. You can find a used one for around 20ish.

[Hassan1991]

No they are expensive then 20k now.
@saad310799 you can use a simple obd2 scanner and go through the O2 pids. WB returns 0-5v with pump current parameters as well.

[dani_kk]

Agreed aem wideband uego gauge and sensor used to be around 28k around 2017.
Now it would be around 80-90k

[saad310799]

I think no point to buy for daily driven cars then

[supraman2jz]

Bhai I bought a brand new X series from Dubai for 30K in 2021!! Used UEGO are selling in KHI for mid to high 20s. (25-28K), most with Chinese sensors.

New X series in Dubai is for 50K right now, UEGO for 65K.

[Hassan1991]

Sir, believe me, they are not that cheap in 2024. And sensors have a finite life.

[supraman2jz]

I know man, I always used to carry a brand new spare sensor in my car, I actually had 2 working kits, one was kept as a spare, and multiple dead sensors and gauges.

[Hassan1991]

Good old days sir.