Hi All, Just thought it would be good to post a follow-up to my previous posts. After installing the PnP ECU in my car, I could get it to start but the idle was erratic and there was no possibility of driving the car. Every time I attempted to get some power out of the car it stalled. The log was showing a “FUEL CUT” not long after I started it and I originally thought it was due to there being no fuel pressure signal available in the car. I am a proper noob when it comes to tuning so my attempts to rectify the problem were clumsy and ineffective. I contacted the Australian rep for ECUMaster, Rama, and sought his help.
Rama set up a remote session via the notebook PC I was using in the car and on this first occasion, determined that the MAP sensor calibration was incorrect. After inputting some more appropriate values, the car started and ran at idle much better. For the record, the MAP in the R50 is a 4.5 bar unit and the calibration is roughly what is shown below.
After this adjustment, the car started and idled nicely but when i attempted to move it, it stalled again and once more, showed a fuel cut. Rama explained that I was going to need to fit a wideband O2 sensor to have any chance of tuning the car properly. I purchased one from him and wired it in to the black plug on the ECU. With the wideband in, I set up another remote session with Rama.
With the new sensor, it was possible to start modifying the base map that came on the ECU but the fuel cut issue persisted. Fortunately, in the “LOGS” section of the software, there’s an entry called “FC REASON” which will indicate the reason for the fuel cut as you drag the cursor through a log where a fuel cut is visible.
What this log window revealed was that the “STUCK THROTTLE PROTECTION” feature was triggering the fuel cut and that was because the switch on the brake pedal, which is used to trigger the protection mode was showing active all the time.
this condition was rectified by inverting the switch in the software.
Some other factors which were contributing were low values set in the fuel cut dialog itself
This was rectified by adjusting some values
So while the hardware itself is fully PnP with respect to the cars OEM wiring loom, there are some settings in the R50 base map that need to be adjusted for the engine to run correctly. I’m pleased that I can keep the stuck throttle protection where some owners have had to turn it off.
NOTE: The images I have shown are not from my main tuning PC so the values might not be spot on.
I can’t speak highly enough of Rama, his expertise and patience were pivotal in getting the car to run and drive. I’m very happy with my ECU and I look forward to refining the tune for my car.