I bought this pick up truck , a 1996 T100 3.4L V6 5VZ -FE, and I bet u the truck consumes like hell abt double its usual3.4l to now 6.8L and it has been pretty expensive on fuel. Changed the spark plugs and injector but trouble persist. I was thinking that it could be the ECU that probably need re mapping but I think again that if it was the case the glutton wouldn't start and drives well like it does. Thanks for any council that can point me to how best can save on fuel, coz running it is really too expensive. Great and powerful truck though, I think if toyota made it to drink this much then the 5VZ engine wouldn't have seen the market.