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[TheBoy]

Idle can be anything from 650-500.  When you put into gear, switch on Aircon or turn the steering wheel, it mostly stalls.  On the motorway the car does 110+!

Thanks

Phil

is the idle erratic?

[PhilP]

Yes, but not all the time.  It fluctuates like it has been placed under load, but no load has been applied.  It's not 'hunting'.

BTW, I have a new ECU that matchs the current one.  I've connected it up but the engine won't fire.  The EM light flashes, I thought that by getting a exact copy that it would work.  What needs to happen?

[TheBoy]

Yes, but not all the time.  It fluctuates like it has been placed under load, but no load has been applied.  It's not 'hunting'.

BTW, I have a new ECU that matchs the current one.  I've connected it up but the engine won't fire.  The EM light flashes, I thought that by getting a exact copy that it would work.  What needs to happen?

Obviously swapping the ecu won't work - immobiliser

[PhilP]

I wasn't sure because I have a fob type immobiliser.  Any other thoughts?