HELP! Major engine troubles!
 

Here's back story, I have a 2000 with a 5.4 and it's been throwing lean codes on both banks (bank 1 is a solid code with freeze frame data and bank 2 is a "pending" code). What it does is, when the weather is fairly cold, it would chug a lot in idle but once you apply throttle it ran fine. It had been doing that for quite some time. I replaced the tps, iat sensor, fuel filter, iac valve, cps, fuel pressure regulator, air filter, several vacuum lines, and ran sea foam in fuel plus in vacuum system. None of this fixed the problem. I settled thinking the exhaust leak at the bank 1 side exhaust manifold was causing it and was waiting to get it fixed. Then, about a week or 2 ago, it started having problems starting but the chugging was gone. It would turn over for about 5-10 seconds before sputtering to a slightly rough idle. But, it always started. Now, tonight, it again started hard and I drove to a friends house but left it running then shut it off at the gas station. When it started, there was a loud pop, some smoke, and a foul smell. I started driving and it ran so-so. But, when I slow down or stop, it will die unless I keep my foot on the throttle. It will restart each time, very hard, but again, I have to keep my foot on the throttle or it just dies. I looked under the hood, nothing looked out of place. None of the plugs are blown out. I pulled codes and got p0171, p0156, p1131, p1151, p0174, p0136, and p1405. Any ideas???

EDIT: just noticed this is a repeat thread. I'll keep track on your other post.

Check your egr system

http://easyautodiagnostics.com/ford/4.6L-5.4L/how-to-test-the-egr-system-1

Yea, not sure how to delete this one.