Hey guys I have a 93 jeep 4.0 and the vacum line from fuel pressure regulator keeps sucking in and makes the jeep stall untill I replace the line. Do you know what the problem is I replaced the fuel pressure regulato already.

 

You need a stiffer line, my old line replaced with some air hose, held up for last 9 years. You can see the yellow opaque line with some fiber reinforcing in these pics. Was supposed to be a temp fix, it has gotten very stiff, just one of those things that keeps workin so I havn't changed it. Also perhaps also some fuel or trans line would work as it has thick wall neaoprene and will hold up in the atmosphere and temps of the engin compartment.