New update.
Car idling but idling low. Around 250rpm.
Introduce an air leak in the intake manifold and it raises healthily to 500rpm.
pressing the accelerator does nothing at all.
I cleaned the AFM and throttle body with throttle body cleaner.
Running quite rich.
No engine light.
So I got 2 trouble codes.
Both I believe were due to the unplugging of wires I had already been doing whilst diagnosing.
I got
P0120 Throttle Position Sensor/Switch A Circuit Malfunction
P0110 Intake Air Temperature Sensor
cleared them and they haven't returned.
2001 m35 won't start.
Drove her from Sydney to Thredbo. Next day she started and idled very low. No response to pushing accelerator.
Even after getting to operating temp. Won't rev. Now has thrown the engine light.
Next day. Now she won't start. Either no fuel or no spark. Plus engine light is a worry.
I'm open to suggestions.