Hello

I apologize in advance for my pitiful English because I am French and I use a web translator.

I own a Ford Sierra cosworth 4x4 1990 blue-moonstone.

a my car for a few days starting difficult.

A cold when I put the contact for the start, the engine puts this property launches an engine speed I very very very low, sometimes limit caller.

I thought it might come from the probe temperature water (blue), I changed it but the problem remains the same.

The engine runs well on all 4 cylinders so it quoted no apparent problem.

slowed the valve has no operational difference whether connected or not. Are this the problem ?

Thank you