Hi guys i got a question. Just Rebuilt my 88 fuel injected 350 its all stock save for 30 over pistons and a slightly more torquey RV cam. When I first put it in my fuel milage was OK but now its getting bad infact its worse than before the rebuild and just seems to get worse. The truck is a 88 Jimmy with 31's and 3.08's the rebuilt motor has about 2500 miles on it. Other than that the truck is factory. Thanks in advance Nemesis P.S. I also took off that stupid air pump as we don't have emissions regulations in Manitoba.