P0174
System Too Lean - Bank No. 2.

I'm getting this code. Any ideas where to start looking?
Symptoms; No throttle responce with a cold engine. After the engine warms up it stumbles badly at wide open throttle.
97 XLT 4.6

 

Check your intake. You could have a vacuum leak around the intake manifold. Spray some wd-40 around it while it is running and it should idle up.