Just bought an old jimny (10+ years), and the fuel injection fuse keeps blowing (changed the fuse 3 times in two months). Now mechanic says i need a new fuel injection pump, though pump was replaced last year. I've been told I have to keep fuel tank at least half full to avoid pump from overheating and will try that, but what else can I check to fix in the elec. system to avoid having to change pump now? appreciate help!