You probably left something unplugged or undone when you put things back
after doing your fuel line install.  I would double check the place
where the air intake boot hooks to the AFM.  Is it sealing good and
tightly clamped?  Also did you remember to plug the AFM back in?
(BTDT).  Either one of these scenerios could cause your problem.
Recheck all of the plugs and spark plug wires to be sure that you didn't
bump something loose while doing your fuel line replacement.  If you go
slowly and check everything you will find it.

Ken Wilford
John  3:16
www.vanagain.com

TJ Hemrick wrote:
> All,
>   Working on a 91 Automatic Multi-van.  Just got done changing all the fuel
> lines in the engine bay.  Now I have this terrible off idle hesitation.  Put
> it in gear and it stalls.  It did not have the problem before the fuel line
> change.  Weird thing is, if I restart, it runs fine.  As I poke the
> throttle, it gets worse and worse until around the 45 second time frame when
> it's just ready to stall as soon as you give it just a blip.  Shut-off and
> restart, runs fine.  I thought I had some air in the lines so I ran it on
> the road and some high idle time in the lot.  No change.  I thought maybe I
> accidently unplugged a vacuum line but I havent' found any.  I checked for
> leaking fuel and have found none.  All the clamps are down and tight.  Any
> advice would be much appreciated.  Pmail me (x53gunner@gmail.com) as I'm in
> a slight time crunch.
>
>
>