My car is running rich and want to hook it up to the laptop and see my sensors are working properly.

Is there a D16Y8 fuel/air ratio graph available?

 

You'll need a wideband O2 sensor.

I'm pretty sure you can monitor the A/F ratio w/ an OBD-II scanner after you have the wideband hooked up.

EDIT:
The OBD-II scanner will also tell you the voltage of each sensor and you could match that against the sensor norms outta a helms manual.

 

My friend has a scanner that shows the graph. Told me to find the stock A/F graph.
I've never used it so don't know what else it can do.
Pretty sure reads the voltage too.

 

bumpy

 

honda ECU's dont support wideband o2s so there is NO way to graph the A/F ratio.

even if you hook up a wideband you couldnt properly wire it to the ECU.

so basically your car runs on narrowband oxygen sensors which will vary in voltage from .1 volts to .9 volts, the voltage will change RAPIDLY if the sensor/s are in good working order.

there is NO way to use a SCAN tool to see A/F ratio. POINT BLANK.

now, with a GOOD scan tool you can graph the voltage of nearly ALL sensors, but you wont find anything wrong with ANY of them unless you have a check engine light. so basically, using the scan tool is only helpful if there is a problem thats emissions related component (check engine light would be on).

 

He's probably talking about the fuel table which doesn't show AFR, it shows pulse width in ms.

I have an AEM wideband on my stock ECU. You said there's NO WAY. But yeah, it's set to mimic the factory O2 voltage output. It's great when you're constantly swapping between the stock ECU and an AEM EMS.

To the OP, your "mechanic" friend is going about it the wrong. That's not how you diagnose a rich condition.