Had some recent stalling problems with my 940GLE with 240K on it.
When I had to stop for a stop sign or light sometimes it stalled. Cleaned the throttle body, seemed better for a day, then it wouldn't start at all.

Talked to the volvo mechanic, suggested replacing the crank position / RPM sensor (I think he called it a bell housing speed sensor).
Anyway, after installing it, the car started right up.
My question is, looking at the FAQ's, most posts indicate that when this sensor goes, it prevents a warm engine from restarting. Well, my car had sat over night when it wouldn't start, so the engine was stone cold. Just wondering if this part was really the problem, or if there is something else wrong that will soon show up again.

Thanks

A bad RPM sensor would cause the tach to drop prior to stalling - a good way to zone in on it. Volvo redesigned this sensor due to problems so it is a good component to replace anyway at this stage in its life.
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Paul NW Indiana '89 740 Turbo 108,000

As the other fellow said, there are other things that could cause stalling. My '93 940 NA which I bought last April had a no start condition for a couple of days. I went through cleaning connectors and grounds and the car started. I still don't know if I fixed anything. Then several months later I went for a drive, parked the car, and 45 minutes later it failed to start. I disconnected and reconnected the crank position sensor and reach down and wriggled the cable at the sensor. Then the car started.

I bought a new sensor and replaced the old one, a 10 minute easy job. When I got the old sensor out, I could see that it had the original equipment color stripe and the insulation at the sensor had split open. I put an ohmmeter on the sensor coil and wriggled the cable at the sensor. The coil showed an intermittant short circuit. I'm hoping that the sensor has been the source of my no-start. In any case, advice on this board has been to replace that sensor at my car's mileage as a preventative measure just like replacing the heater hoses and valve (which I've done).

I'm no expert on this, but I will share my stalling/no start 940 experience.
Mine quit after a panic stop and after a painful (now funny) experience getting it home, I spent 3 weeks working on it. RPM sensor, Power stage, radio suppression relay, AMM, cleaned all connections I could find, etc. Finally gave up and my new friend at the Volvo shop spent two days finding a bad ground at the ECU on the drivers' side kick panel.
My point? Count your blessings that the first thing checked was the culprit.
Mark
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'94 940 Wagon, '84 240 turbo sedan