rudeboi619
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i have a 98 jimmy with multiple fuel problems 1. fuel gauge reads 1/4 tank when empty. Engine dies when braking on down hill slope (only if less than half full which would actualy be a quarter of a tank. i pulled codes & freeze frame data my long term fuel trim 1&2 both read 7.8 ive been told thats alot and basically my ecm is just dumping excess fuel. i checked mpg spec. its like 16mpg combined i get like 10-12 if im lucky. Any suggestions on what to do