Quote:
Originally Posted by Silverado_Dude
ok i was getting about 15-17 around town...and 19-20 on highway with my 2000 Silverado 5.3L. I recently got a Flowmaster 40 series muffler, and ive cleaned the fuel system, throttle body, MAF. And since all that...im getting about 11-12 now...all together. It sucks. What do yall think it is?
Thanks
This is the exact opposite of whats suppose to happen when any of those things are done.
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this is what happens when you de-tune the system...
prior to you spending all that cash your MPG is what I get on my 2000 5.3L 4X4 LT ....19-20mpg hwy...
this is what is expected to occur with these vehicles...