Alright so I started my car for the first time in 6 months today. In that time I installed a turbo, mani, down pipe and fuel system. Fuel systems consists of a Full Blown 340lph pump, -6 lines, Aeromotive A1000 and a high flow filter. Fuel pressure is set at 42-43psi.

Now, I went to start the car and the AFR is around 16 and gets leaner… I don't know if I am getting this reading because of the open down pipe and the sensor is near the opening??? Cold starts if I remember correctly were around 14-13. I've only let the car run for about a total of 30 seconds. Maybe 10-15 seconds at a time to make sure I wasn't having issues.

Second issue is the car is blowing a decent amount of smoke out of the exhaust. It is not black nor blue. More of a steady stream of white. Not sure what to make of it…

Am I alright? This car racks my nerves sometimes…

**CEL is coming on and stays on at startup. This is new and didn't happen before I garaged the car... Any ideas?**

 

White smoke = coolant... If you're burning ANY fluids, it will drastically effect the accuracy of your AFR readings through the wideband. ALSO, sensor placement is absolutely crucial to the accuracy of the readings. Can you post a picture of your downpipe and sensor location?

Don't make life more difficult - check the CEL code and resolve whatever issue it is first and foremost...

 

I know coolant is white. Car did not burn anything before it was garaged. There is absolutely no reason why it should now. I didn't alter anything that would change that.

I checked the code. I am getting a CEL but no code… I don't get it.

Keep in mind that is exhaust situation is temporary. It will be finished and welded within a week.

 

The readings are skewed because the exhaust is sucking fresh air past the sensor making it read leaner than normal.

white smoke can only be coolant. are you sure you haven't touched any of the coolant lines?

 

100% sure I did not touch anything to do with coolant.

Now, I did a little bit of investigating and I had a blown fuse. Replaced it and I got code 41. Primary Oxygen sensor. It is not hooked up. How do I run my AEM wideband into the S300 ecu to not throw the code?

 

there should be a 0-5v input on the s300 for your wideband input.

there should be a way to disable the oem o2 sensors within the s300 software

 

I think I figured it out. I'm supposed to take my white wire from my AEM UEGO and tap it into pin D10 (ELD) on the ECU. Then I'm supposed to change some settings in Hondata. Put it in closed loop, disable O2 heater, etc…

Correct?

Just read that you can use Pin D14(Primary Heated O2)? If I wire it to D14 do I have to change anything in Hondata?

 

Regardless, as wantboost said - you will NEVER get any accurate readings from that sensor with the downpipe cut off right there. You will undoubtedly have ambient air coming across the sensor showing leaner readings that actual. You need to extend the length of your downpipe.

As far as the CEL, no code but solid CEL indicates an issue with ECU, connections, and/or the chip within the ECU.

 

Whats regardless? I was wondering if the CURRENT length of the down pipe was affecting my readings. The down pipe is getting finished within a week and will be connected to my full exhaust.

The CEL with Hondata/AEM UEGO is another issue.

 

Yes the current length and sensor placement will cause erroneous readings.

 

I figured as much.