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fuel milage


jstride
03-03-2013, 02:24 PM
had replaced fuel spider assm. and injecters now my milage has dropped from 16 mpgs to 13.5 mpgs. 1999 sub 5.7 4/4 160000 miles auto. any ideas?
j cAT
03-05-2013, 10:57 AM
had replaced fuel spider assm. and injecters now my milage has dropped from 16 mpgs to 13.5 mpgs. 1999 sub 5.7 4/4 160000 miles auto. any ideas?

could be wrong injectors or they are defective leaking. do a full pressure test to check this out.


16mpg on this vehicle is a little high. how about 14MPG is what I would expect..

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