Hi,I’m hoping someone might be able to help as at witts end .
I have an Insignia 1.8 A18xer engine code 2009 that won’t run unless the map sensor is disconnected.
When map sensor connected diagnostic using vauxcom ang maxidas shows no faults.
The engine will start and cut out after a couple of seconds on every attempt to start.
If I disconnect map sensor it will start after 5 attempts and idle perfectly all day.
The engine will rev up if throttled gradually.
When engine is running if I connect sensor the engine cuts out.
The map sensor has been renewed.
After many days trying to find fault ,I know why it cuts out but am unable to find the reason behind it.
It appears that when I connect the map sensor it shuts off the injectors.
I found this out by spraying brake cleaner/ easy start into air intake and it revs and runs continually whilst continuing to spray into air intake...
If anyone has any advise or ideas where to look it would be greatly appreciated as I’m at the point of giving up.
thanks