i'd check to see what else the rats chewed on. vac hoses, plug wires, etc..
if your running points, clean them up with a little sandpaper
but it sounds vacuum related
around here no rats, but we have killer squirrels
anything parked outside get stuffed full of black walnuts.
they chewed a hole in my cold air pipe, pulled all the paper out of the filter and then proceeded to fill everything with walnuts.
how my truck ran with all those nuts in there is beyond me; throttle body, air cleaner, cold air pipe and inner fender was full of nuts.
i didn't notice it until a nut rolled under the throttle cam and stuck the throttle wide open.
once a squirrel stashes nuts in there, he will go back and stash them again and again.
i could fill a truck bed with the nuts i've cleaned out under the hood
mowing my yard or even walking in the yard can be hazardous in the fall
