my 90 240 wagon with approx 250k miles has had an issue for a few years that is more annoying than anything. when the car is not cold or not hot... for instance, if i crank up and drive around the corner to the gas station, stop the car... fill up and try to crank, the car will notidle. i have to give it a bit of gas while cranking and hold my foot on the pedal to keep it running once it starts. when i pull off and get moving a bit, i can release the pedal and when i cometo a stop it will idle fine. also, when its fully warm, ill crank it up andthe idle will lope quite strongly for about 10 seconds or so, then it cleans up and runs fine. any ideas?? thanks

 

First, when diagnosing any problem, and before you touch anything, (to avoid inducing any phantom codes) you should check DTC's. Check this out, or other info on this or other sites.

http://www.troublecodes.net/Volvo/


Next I would clean the throttle body.

Here is how I service the throttle body...

1. Remove T/B
2. Clean bore and plate thoroughly with brake or carb cleaner and an old toothbrush.
3. Loosen and back off the idle stop screw and idle switch.
4. Bring stop screw so it just touches lever and turn another 1/2 turn, tighten nut.
5. Adjust Idle switch so it closes at idle but doesn't hold the throttle plate open.
6. Install T/B with new gasket
7. Install throttle linkage and make sure it isn't holding the throttle open.
8. Pull the ECM fuse to reset the ECM adaption.
9. Warm engine to operating temp, pinch off hose from air pipe to the idle valve, rpm should drop 200 rpms or so, but shouldn't stall! If it stalls, redo steps 4-7.

Also you can try cleaning the idle control valve.

Good Luck,

3B