Got the YJ restarted today. New battery cables, battery, serpentine belt, idler pulley bearing, plugs, wires, cap rotor, and valve cover gasket. Starts better but still idles rough.
Found a sizeable crack in the exhaust manifold, and fuel pressure is sitting at 20 psi. It should be 31 at idle, or 39 if you unhook the FPR. Unhooking the FPR made no difference. So will be ordering a new manifold this payday and troubleshooting the fuel pressure issue.
Theres also a constant rattle that MAY be the timing chain hitting the cover. Or the second idler pulley bearing, stethoscope shows the noise in both areas but they're really close together. Ive got a spare idler pulley bearing so Ill try that first before replacing the timing chain.
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