Sensor failure stratedgy

Had something come up wthis race weekend that I don't have a nice solution to. We had a fuel pressure sensor failing, but it was just very erratic so it wasn't triggering out of voltage range, but was fluctuating faster than the FP physically can, so I knew we had a bad sensor. We disconnected it during our next pit stop and we were all good. Is there a way to setup an input to force the ECU to ignore a sensor? I know its been done before (I have been in a Bosch car that had this feature) but not sure on the standard m1 software. I could do this in a non elegant way via the physical layer, but wanted to check with the experts first.

Edit: If the above is not possible with out custom firmware, is there a way to log fuel pressure and not use it to calculate injector PW? I could move it to a different input but then I would 1) have to remember that FP is not called FP, it may not be on the standard outputs for CANBUS.

TIA,

Jordon

My expectation would be "Fuel Pres Sensor Diag" and set the low/high values pretty tight to the expected voltage/pressure.

As Denis said, configure the Sensor Diag to operate only in a narrow window, and set the Default to what the system usually runs at.

Coolant pressure is a good fallback option to read the sensor as it isn't used in any control strategies, but is available on the CAN data.

I thought about that, but I actually had a failing pump where the pressure would drop to half of target and the MoTeC saved the day and the car ran perfect all day like that. But that is probably a rarer case than a faulty sensor (we have backup pumps we can toggle on).

Good call on the coolant pressure. We run stock engines so head gaskets failures are unlikely, and at our power level nothing is very dramatic.

Thanks gents.

Partial failures like that are harder to cover with fall back strategies.

Indeed. I drove a race car that would let you select to ignore sensors. But it was a custom firmware.

Could go "analog" and just put a relay in the +5 to the sensor and control it via a PDM channel. More failure points of course.