fuel problem

[vand678]

I have an 87 broncoii that sat for about 4 years and I recently got it running . When I'm idleing it runs like a champ but when I drive it starts to choke out like its struggling for gas. I drained the old fuel from it and ran fuel objectors cleaner through it but it just started acting funny again. Anyone have any ideas to what the problem might be

[Mud Addict]

Replace the fuel filter

[vand678]

I did that allready and it still struggled

[B5150]

just try an run in out for a coulple weeks. mine did the same shit but it just cleared out