Citroenxara Fair

I have a Citroen Xara 1600Gasolina of the 2ooo and has slightly uploaded

The slowdown is handled by the injection calculator, based on the information it receives. If you have a sensor working badly you can give that fault. For example. Motor temperature sensor, pressure in the assisted address, pressure in the air conditioning, etc. An easy thing you can do is make it clean contact to the step by step of the idle.
It is a black device that is in the butterfly body.

If you do not have check on it is difficult for any sensor to fail, you can clean the admission body and the Rerenti regulator with a Duco diluent or some electric degreasing and tests as you are doing.

It does not have the fault light on for or that it can be ruled out that it is a sensor also the diagnosis does not sing to me and the strangeness is that it is only uploaded slightly to 1OOO

If you have access to a good scanner, I suggest that you go to the medication of parameters and see the values, to see if they are congruent. It is past for example that the temperature sensor gives -134 degrees just started, with which it is all
evil, and the diagnostic light does not turn on. There are several things that make the engine work badly and do not turn on the light. Luck