2003 Suzuki Jimny Problems

when going through the gears getting up towards top end sometimes i can smell petrol fumes,the petrol needle not altering.

ive gone through 2 tyres on each front wheels they keep wearing thin on either in side or the out side had tracking done bout 8 times had wheels rebalanced, tracking more new matching tyres,new disks pads, had wheel barrings checked ive had...

New thermostat fitted and working but heater not warming up