This is not the most critical adjustment in the world. The TPS should be heard to click as you open the throttle and again as you close it. But you don't want this set as a hair trigger response and you don't want the throttle half-open before the TPS clicks to tell the ECU it doesn't have to maintain idle.

The proper Volvo spec for *adjusting* the TPS on LH-Jetronic cars (as per TSB) is as follows:

o Always make sure the throttle (gas pedal) cable and throttle spindle linkage aren't restricting the throttle from properly closing. The throttle plate adjusting screw should be able to touch the throttle stop (LH 2.4) or throttle lever (LH 2.2).
o Release the throttle position switch (TPS) adjusting screws so that it can rotate.
o Back off the throttle plate adjusting screw so the throttle can be held fully closed with the screw not touching the throttle stop/lever.
o Holding the throttle plate lever closed, advance the adjusting screw until it just touches the throttle plate adjusting stop/lever (any further and it would start to open the throttle plate).
o Advance the adjusting screw 1/4 turn more and lock in place.

For a VDO TPS (common):
o Place a 0.25 mm feeler gauge between the throttle plate stop/lever and the throttle adjusting screw.
o Rotate the TPS slowly counter-clockwise until the click is heard then lock in place.

For a Bosch TPS (less common):
o Hold the throttle plate lever closed.
o Rotate the TPS counter-clockwise until the click is heard.
o Continue to rotate counter-clockwise until the TPS hits the end of travel (any further and it would need to open the throttle plate) then lock in place.

The proper Volvo spec for *checking* TPS adjustment is as follows:
o With a 0.15 mm feeler gauge inserted between the throttle lever and the throttle stop screw, clicks should be heard as you open and close the throttle.
o With a 0.45 mm feeler gauge inserted between the throttle lever and the throttle stop screw, no clicks should be heard when you open and close the throttle.
o Adjust to spec if this doesn't happen.

There are additional adjustment specs for the throttle spindle linkage and the throttle cable, but they are of less importance. The actual specs vary by engine type. Suffice it to say you need to maintain a bit of slack so that the throttle linkage, throttle spindle stop and the throttle cable are not limiting factors in closing the throttle.

To help maintain a smooth idle, without hesitation and stalling, make sure the throttle body is routinely kept clean. Remove the throttle body from the intake manifold for proper cleaning. The edge of the throttle plate and the area in the throat where it closes are the most critical to be clept clean, as are the vacuum orifices and air bypass channels. See the FAQ for more details.

If idle problems persist, such as an inconsistent idle or stalling, then the idle air control (IAC) valve may be dirty/worn. See the FAQ for more details.
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Dave -940's, prev 740/240/140/120 Never overestimate what little I know.