Hi Resunoiz,

I'm surprised that no one has answered you, perhaps they are busy watching playoff football.

I have no almost no experience with 240 but did save 240 service manuals while searching for a wiring diagram for my 1993 940.

It seems the B19A is a rare engine, available in either 90 or 97HP.
What is the 2-digit engine code in your VIN number?
From the manuals I looked at you have the "CI" system and NOT "CIS".

The CI system has an "auxiliary air valve" that increases engine speed during warm up.
It should have a number stamped on it: 0 280 140 ...
If it doesn't completely shut you will suffer high RPMs.

This valve is located between the airflow sensor and the cold start injector.
It contains a bi metallic spring which is heated to 70C to fully close it.If you have this valve, check that you have 12 volts to the connector when the engine is cold, and that the valve is closing properly. Put your ohmmeter on the valve
connector and expect to see some heater coil resistance and NOT an open connection.

Provide your email link and I can send you the info.

Bill