I have a 96 sonoma I recently got to cut back on gas, It has a very bad idle, almost like a miss while idling, but is smooth and runs fine when driving. I have replaced wires, plugs, and both coil packs and one injector, this helped a little but still bad, and vacuum hoses seem to be good, it has some wire damage from a rat from sitting up, I have repaired most of that, but any help would be appreciated.

Thank you