Originally Posted by Cossie Phil

Im no expert but have spent a bit of time on Autronic SMC and SM4 ecu's.... If you look at the age of each fault(in cycles, each start to stop) the baro and manifold pressure faults are all a similar age and the misfire related faults are all similar ages.

The baro, manifold and overboost faults will all be related. The baro press reading is taken on start up from the map sensor, before cranking. The manifold and overboost readings also come from the map sensor while the engine is running. You need to check all wiring and connectors related to the map sensor and then check the sensor is reading correctly by using the laptop and a controlled vaccum and pressure supply, like a mightyvac or similar. It is highly likely the issue is wiring or sensor for this one, especially since you are using an external map sensor, internal map sensors are typically bullet proof in these ecu's.

The other 3 cyl i/p type faults all relate to your crank sensor signal. It is being corrupted through one of the following....wiring issue, elec interference, sensor fault, trigger fault eg gap to big/small or trigger lugs damaged. This will be the source of your missfire.

The boost trailing off could be a map sensor related issue or a mapping issue, you can log a run with the ecu and usually see what is causing the issue if you select the correct items to log.

Cheers,

Phil.