CO2 tester: for Air/Fuel mixture

[BJ71]

Anybody here from Angeles pampanga knows a shop who do CO2 testing for the right Air/Fuel mixture ratio in a car? This CO2 tester will tell you if you are running lean or rich in fuel. Thank you.

[jick.cejoco]

Anybody here from Angeles pampanga knows a shop who do CO2 testing for the right Air/Fuel mixture ratio in a car? This CO2 tester will tell you if you are running lean or rich in fuel. Thank you.

exhaust gas analyzers nowadays do the five gas analysis: CO,CO2, HC, O2 and oxides of nitrogen. to properly analyze the exhaust emissions, most states use the five gas analyses just like california specs. obd II systems are already capable of doing this

[niky]

The problem with engine tuning with an exhaust gas analyzer is that it might not have a quick enough sampling rate to allow you to do fine tuning.

You need an AF-Meter with a wideband O2 sensor... not a CO2 sensor... to tune your air-fuel ratios.

[jick.cejoco]

The problem with engine tuning with an exhaust gas analyzer is that it might not have a quick enough sampling rate to allow you to do fine tuning.

You need an AF-Meter with a wideband O2 sensor... not a CO2 sensor... to tune your air-fuel ratios.

change your analyzer

[paulgozon]

Anybody here from Angeles pampanga knows a shop who do CO2 testing for the right Air/Fuel mixture ratio in a car? This CO2 tester will tell you if you are running lean or rich in fuel. Thank you.

Since most automotive shops in the philippines does not have a exhaust gas analyzer, try going to a smoke emission test center, the one we used to go when we renew our vehicle registration.

[niky]

Forget the emissions center, take your car to a performance shop with a wideband. Most emissions centers only have readouts for HC, CO and particulate emissions. While you might be able to tell if the car is running incredibly rich from the HC readings, you won't have the tuneability you'll get with an O2 sensor.

Yes, a modern five-gas analyzer will do O2 also... but local emissions centers are only required to measure HC and CO. Nobody does NOx or O2 testing at the smoke places.

[biglang_liko]

Just curious sir, doesn't the ECU self-adjust the air-fuel ratio depending on the readings from the onboard sensors? TIA.

[niky]

Depends. If it's an OBDII car with oxygen sensors, yes. Some OBDI cars, too. But some 90's cars with OBDI that came here had the O2 sensors disconnected or simply not put in.

[biglang_liko]

*niky - thanks for the reply sir, one more thing... Would using e10 (which I read is a gas oxygenator) increase the oxygen in the exhaust and "fool" the oxygen sensor into thinking that the engine was running lean and cause the ecu to make the A-F ratio richer?

[niky]

*niky - thanks for the reply sir, one more thing... Would using e10 (which I read is a gas oxygenator) increase the oxygen in the exhaust and "fool" the oxygen sensor into thinking that the engine was running lean and cause the ecu to make the A-F ratio richer?

It shouldn't run too much differently, although it will... it's a 2-3% difference in oxygen content. You can check your sparkplug condition... if they're black, then you're running rich. I'd check other things first, like the condition of your intake sensors (what car is this?), spark plugs and fuel filter. If the car is running poorly, sometimes E10 can be contaminated with water, which will do bad things to your fuel system.

Also note, cars not designed to run on E10 can't adapt to the differences in the fuels, and may run poorly. Fuel economy will also suffer.