my jeep has been cutting out. it just quits running for a second or 2 then runs again. when it happens the volt meter goes to zero. running a HEI so its not the ignition module. seems like its a loose wire somewhere, but where?? was hoping someone had an idea where to start. battery cables are new, added extra ground from motor to body so I know thats not it.
jeep is an 87 with a 4.2