ECMlink Fuel Trims Jumping Around

[TalonSpeed]

I have a 2.3 Auto 2g with HX40 Kelford 272 7bolt. Car starts and idles fine with no smoke. But switching from park to drive the fuel trims jump by 20% and car starts to smoke (blue) just idling in drive. What causes this?

Blue smokes means oil but i dont think its oil. Looking at the VE table my tune cant be that far off. It just moves one cell down switching from P to D. Fuel trims jump +20% but AFR according to WB stays the same??? How can this be? Inj Duty increases by about 20% from 1.5 to 1.8. Log posted

Shifting back into P everything returns to normal and smoke stops.

 

[91TurboZ]

I'm not sure what would be causing the smoke, but to address your idle issue you might want to look into the FastIdleISCPosATAC table in the direct access tab. When you put it in drive your ISC goes wide open. I have attached a pic of the stock settings, and they are considerably different from what you currently have

I'd also try adjusting your VE tables to straighten out the AirflowPerRev. You seem to be aroun .43 at idle, but it should be closer to .28 - .32 for a 2.3.

 

[TalonSpeed]

My PVC\catch can setup was causing the oil and smoke issue. The setup consisted of two stock size lines going to a catch can. Instead of having a filter on top I had the entire top port going to the intake before the turbo. I guess when Vac dropped (switching from P to D) it cause a back up of crank case pressure that probably caused my oil not to drain from turbo. So that problem is fixed.

Now the tune........still chasing the tune. I can get the trims to hover around 0% at idle drive the car and stop and the trims are way off. Almost like the injectors are reducing in size as I drive. Could be a faulty wide band though. Maybe the oil killed it. Will do some more testing this weekend.

 

[curt-s]

..But you would want a vac line going to the intake before the turbo rather than a filter. The vac from the pre-turbo hookup would draw out crankcase pressure, which a filter won't do. Even a drop in vacuum from park to drive would still be more negative pressure differential than a filter which only sees atmospheric pressure.