2001 Buick LeSabre - Starts great every time but immediately stalls out aftrwrds

During last weeks coldest day (-12 degrees F) went to start my 2001 V6 3800 Buick LeSabre and it did start - but would not continue to run on releasing key from Start position... Tried a couple of more times with similar results - starts right up and then dies.

I just assumed something was frozen up and decided to wait until a slightly warmer day to try again. Saturday & Sunday it was basically just above freezing all day so I tried to start the Buick yesterday afternoon and got the same results. During one attempt I tried pumping the gas pedal a little to give it a little more gas to keep it running and it died just as quickly.



The car had run fine a couple of days before the hard cold snap for around 10 miles and then parked in the drive way.

Also, last month it had to have the fuel line replaced by my local shop due to a fuel leak and rusted fuel line and I've run it for maybe a couple of hundred miles since the repair...



Anything else you can think of that I could try - besides waiting until the temperature gets into the 40's, which at this point might be another month or two...?

Thanks,

greynold99

2001 Buick LeSabre - Starts great every time but immediately stalls out aftrwrds