I've got a '90 740 turbo wagon that will start, run strong for about 2-3 seconds, then dies. I've already done a round of superficial testing:

Electrical - I unplugged the distributor and checked for sparkfrom the coil wire.
Mechanical - I removed the oil cap to make sure the cam turned when the engine's cranked.
Fuel - I disconnected the line from the fuel rail to make sure I had flow to the injectors.

All checked out okay. I replaced the crank position sensor3 years ago, new fuel pressure regulator two months ago, new fuel injector relay, in-tank fuel pump (and sock) secondary fuel pump andfuel filter about 3 years ago.

The error code in memory saidthe MAF sensor or sensor wiring was bad. Would a bad MAF alter timing so much as to cause a no-start situation? The car also sat for about a week during a snow and a few days of cold weather, followed by some warmer days. I put in a dose of fuel drier, but could I have more moisture build up in the tank from the temperature change that could be causing this problem? - Please advise

 

I would go to a junk yard and find a MAF sensor and start there. Obviously there's a problem there.
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Unplug the MAF and if it starts and idles good the MAF is bad.

 

Thanks fellas! I'll attack the MAF sensor and let y'all know what happens.

 

If your main fuel pump has died, your car won't start. But the in-tank pump will still deliver fuel, thus giving a false positive. Go to www.stepbystepvolvo.com and get free guide to troubleshooting 740 no-starts.

 

Well I disconnected the MAF sensor and was able to go round the block a few times.
I'll let you know what happens when I install the replacement.

Thanks Gents