Engine stalls while driving

Does that mean my fuel pump needs to be replaced?

We just put a new clutch in and I was letting it sit at idle, after approx. 10 minutes the car stopped running, and hasn't ran since, what do I do first?

Codes are P0446 and P0442

That's why I am stumped. When it first started acting up I got the code reading for misfiring 3rd cylinder so we replaced the spark plugs and the knock sensor. Was running good for a week then was driving along and it sputtered a little and stalled. I got it started again, revved it up and was able to drive it onto the road where I live. There is a hill on the road and it just kept stalling every time I hit the gas. I got towed to the top of the hill and was able to coast the rest of the way into the driveway. That's why I'm thinking possibly ignition coil.

Check for torn air boot after mass air flow. Or tubes under air cleaner housing.

Believe it or not, it was a loose battery connection. When thye replaced the battery, it was installed incorrectly and never set down all the way. Battery is now on securely and haven't had a problem since.
Thanks to everyone for thier help!

My 2000 Subaru impreza outback 2.5l charged battery fully out of car and still car won't start won't even crank. Why? I was driving the car and I heard a belt squeal and the lights got dim then all of a sudden the car bucks and stopped abruptly. Had it towed home the wrecker driver tried to jump the battery and it wouldn't crank. Next morning tried to jump start it nothing but battery drained a bit. Checked fuses and breakers and circuits and checked for loose ground. Charged battery out of car for 8 hours turned the key just a brief click and nothing. Could it be starter? Just bought car from mechanic who said nothing wrong w/it, it was Mechanics Lien. Noticed belt for power steering and alternator were loose had neighbor farmer/mechanic tighten it up.

Thank you all, I've decided to have engine rebuilt. When trying to manually crank
The engine was in fact seized. Found out by thinking back on my military training.
Gotta love those Subaru.

I have a '97 impreza 2.2. The car starts but dies after a short amount of time. After the car dies it will fire right back up and run for another 15sec or so until it dies again. There is alot of carbon coming from the exhaust. I have tried pulling the plugs and they seem like they are being fouled out because they are very wet. They are also coated in a thick layer of carbon. I tried new plugs but nothing changed. All the plugs looked the same so it leads me to thing it isnt an injector. There is also a strong fuel smell coming from the car. Any ideas?

I took the returnline off and started the car. It pumped out quite a bit of fuel and still did the same thing.

Vehicle: 1997 Subaru Impreza
2.2L Engine
100,000 Miles
Automatic Transmission

Can you tell me what might cause the engine to cut out at highway speeds or die when at a stop light only after it has been running for approx 15 min?

Symtoms: Car starts fine and runs fine for approx 15 minutes. After 15 Min at highway speeds the engine cuts out or misses but then it goes back to normal and keeps going. It does this off and on when driving. When at a stop sign the engine will die but it can then be restarted. No errors lights are lit on the dashboard. Driver said issues started right after filling tank.

Troubleshooting: Nothing obvious under the hood like a vacuum leak or faulty wires. Checked fuel pressure and it was in range. Replaced the fuel filter. Plugs look good. Air filter is clean.

Thoughts?