Thanks. I’ve reconnected all the sensors and now idling with no error codes but still really rough and won’t rev.

I’m going to check the values across all of the ECU pins next. Just about had it with this car though and in the 15 years I’ve owned it this is the first time I have seriously thought of getting rid of it. I’ve only done about 20 miles in it since last summer and might be time to get it running and sell up for something a tad more reliable.