I recently hooked up my hondata s300 and wideband to my car and my wideband read out 14.7 then jumped to 16.0. now I am seeing three flat bars across the wideband. I read the pin out info online and connected the white wire from the wideband to d10 ECU pin. Power is hooked to the radio wire and ground is behind the dash on metal. I uploaded a tune for a d16 vtec. My motor is a minime setup with a skunk 2 intake manifold, 67mm TB and exhaust. Any advice on where to look would be appreciative.

 

Can you post a picture of what you are seeing? It might be that the car is very lean.
Does the car start and idle?

 

I will update today when I receive the new wideband. I contacted aem and was informed that the sensor was more than likely faulty. Waiting on the new wideband to come in today.

 

The car starts and idles but the Rpms bounce up and down from 2-3k Rpms. I got the new guage and it is doing the same thing. P00 on warm up and then 3 flat lines on the guage where the readout would be. I'm going to run new wire from the guage underneath the car out of the driver's window to make sure the wire didn't get messed up when I pulled it through the firewall.

 

That's odd. Have you tired to add fuel to the table to see if that changes? Also, check for vacuum leaks. That's what normally causes the rpm fluctuation.

 

I figured it out my header had a leak in between where it goes from 4-2. Amazing what an exhaust leak can do to an air fuel ratio guage. I have had an exhaust leak for months and didn't even know it.

 

Glad you figured it out. I have seen false lean conditions cased by exhaust leaks skewing o2 sensors. Let me know if you need assistance tuning.