You Called???

All petrol Efi engines do that and then settles down to a tick-over 650 or so rpm in 30 seconds Remember not to touch the gas pedal when starting, water is condensation and the black stuff sugests that the motor needs a good blast down a motorway, Efi's like that now and again.

Regards

Peter

ANOTHER ONE ! ! !
What engine is it?
Petrol? Diesel?
HOW can we help if you don't give us the basics?
It sounds like a faulty petrol engine - or maybe a diesel .

Never owned a Efi then!