Why is motor hard to start and dies when trying to accelerate in gear ?

What is your question?

92 ford Econoline clubwagon Sometimes starts but dies when put in drive and trying to accelerate but when I do get it started it seems to idle fine until I step on gas it starts to bog down like it is not getting gas it is a fuel injected 460 in a 1992 Ford Calista rv

What makes this problem better or worse?

Nothing

How long has your 1992 Ford E-350 Econoline Club Wagon had this problem?

Few weeks been stuck it's a rv and current home