Sorry Typo in subject ! should be "Mpi Not Switching To Closed Loop"
I wonder if anyone can shed any light on this little doozy.
So my Late MPi does not switch to Closed Loop operation when warmed up. Due to this the emissions are not able to pass an MOT, before this started and had very very good emissions and passed with zero problems.
I had it looked at last year by a MG/Rover specialist with a Rover T4 Testbook and was told it was most likely a problem in the wiring. After some hunting a NEW complete Engine bay wiring loom was sourced and fitted by myself.
The new loom did not resolved the problem.
I have a Pscan.eu unit and the live data at idle shows the below.
Now i take it the 'Oxygen sensor voltage bank 1' is the (or should be) reading from the Lambda, but it fixed at 0.48v even if i unplug it! The Cam Postion also does not move from 0.
So far I've tried almost everything i can think of.
- New Loom
- New MAP sensor
- A different relay box
- A different known good Lambda was tried
- New Cam sensor
- Ground points all look good
The engine is a 1380 so should run a little lean on the stock MEMS but due to not running in Closed Loop and being on a Limp mode its running rich.
The Car does also have a Swiftune SW5-07 MPI Cam, i wonder if somehow its not picking it up correctly (is that even possible?).
What could be the problem here? ECU fault..?
Edited by Ruckus, 23 April 2018 - 04:14 PM.