1996 5.7 fuel regulator

[joker1s]

i have a 1996 350 and went to replace the fuel pressure regulator. My question is there supposed to be a vacuum line going to it? It has the nipple on it but I don't see any lines inside the intake for it to hook up to. I had this truck for 2 years now and has always done the hesitating. Changed all of the usual stuff( plugs,wires,cap and rotor, fuel filter, and o2 ) but still hesitates. Any other ideas on the vacuum.

[2000CAYukon]

No vacuum line on this design. See http://www.automotiveforums.com/vbul...sure+regulator

//2000CAYukon

[joker1s]

Thanks for the reply, I'll throw it back together and hope for the best. By the way, any ideas why it would be hesitating when I step on it. Already changed the fuel filter, plugs, wires, cap , rotor, o2 sensor, and still comes up with random misfires. no. 3 was the worst one with over 200.

[2000CAYukon]

Originally Posted by joker1s

Thanks for the reply, I'll throw it back together and hope for the best. By the way, any ideas why it would be hesitating when I step on it. Already changed the fuel filter, plugs, wires, cap , rotor, o2 sensor, and still comes up with random misfires. no. 3 was the worst one with over 200.

A leaking FPR can cause a misfire.

Other things that can cause it:
- worn out dist drive gear
- worn out spider (note there is an upgraded spider that converts from central port fuel injection to multiport fuel injection)
- intake manifold leak

Good Luck,
//2000CAYukon