It sounds to me like the PowerFC is using a map that won't work for your setup, or maybe one of the sensors isn't reading correctly and the stock ECU is working around that better than the PowerFC. Does the car have a wideband O2 gauge? Are you working with an experienced tuner who has used this ECU on rotary engines before?

 

Seemed to me that it is coming from the e fan.

 

Yes, I have brought the car to a tuner and got the car tuned since I last posted.. The car was running fine on the dyno, during the test drive, and even my first few hours of driving. I thought the base map was the issue.

The next day I drove it, same thing happened again. I am completely clueless what to do at this point, as I can not find the concrete reproducing scenario.

 

It sounds like some sort of intermittent electrical or fuel issue. You mentioned something was burning, so it's probably electrical.
You're going to have to find what was burning.

 

Did you check the connection of the coolant hose (that runs to the throttle body,) where it connects to the back of the keg?

Check yoiur wiring in places where it runs through the firewall? Has anyone fished some extra wires through there, say for a gauge? They may have damaged the harness.

 

I wonder if smoke under the UIM could be from leaking oil from the oil injectors lines, Or the vacuum lines have come of the injectors and somehow you are getting blow back through the injectors.

You mentioned no codes. But sometimes the OMP will go wonky, on and off, so you might not get a code.

But then the OMP faults and the stock ecu (at least), could put the car into limp mode.

Often the OMP are removed when engine bays are simplified. Do you know the status of yours?

If the OMP was removed you would have got a code, I beleive.

 

The only thing through the passenger side engine harness grommet is just a brand new engine harness.

and the throttle body coolant line seems securely connected.

 

My omp is still there. And car seems to run ok on stock ecu with no code. Only has problem with power fc.

 

There are guys that can analysis power fc for faults.

Check yours that none of the pins are bent.

Try a different power fc.

 

Have you checked the sensor grounds for the engine wiring harness at the engine block? There is one by the rear engine lift point and another on top of the rear rotor housing under the UIM. What you're describing has all the markers of an intermittent connection somewhere, just because the part was replaced doesn't mean it shouldn't be double checked.

I fought boost control issues for a year, the car was flawless on the dyno but on my ride home it began to hammer on the boost control solenoid giving me pressures between spring and the boost setting at WOT; it was violent and probably wasn't great for the engine. I replace the boost control solenoid valve, check all the engine bay wiring connections and control pressure hoses to no avail. Finally, one day I decided to check the one thing I swore it couldn't be which was the harness pin that we moved prior to dyno tuning. I had thought, "Surely it locked in correctly after repining and it can't be the problem because it was fine on the dyno" and I couldn't have been wrong. In 10 minutes I found the pin had been fat fingered and I fixed it, after that I never had an issue again!