if you put unleaded plus in a 2001 jeep cheerokee 4.0 can you get a gas knock
battery tested bad was old from 2006 wasnt having problems with it but replaced it to be safe a couple days before i put unleaded plus in it for the first time when it got down to an 8th of a tank i put regular back in it after changing battery it has a load knock when starting out what could be the problem
Have you checked you oil level? The fuel should have no effect or cause since the cherokee is made for regular fuel.
just had oil changed and i just checked it its fine
It is possible you got a bad tank of gas or because the tank was run low on fuel causing the filter to get clogged and restricting fuel.