Join Date: Apr 2011
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[B][/B]10 MPG NEED HELP
I have an early 99 7.3 i have gotton 10-11 mpg the last 10- or more fill ups
i have some DTC's
P0238- turbo/super charger boost A (tc/sbc-a) ckt
P1249- Wastegate control valve performance
P0603- Internal control module keep alive memory (kam) error
P0478- Exhaust pressure (ep) control valve high
P0470- Exhaust pressure A ckt
P1211- Injector control pressure higher/lower then desired (engine running)
AFE STage 2
i think its a 3.5 Down pipe to 4"
sct DP tuned it seems like any tuner i use bad mpg i had hyper tech, and sct tunes,
when i first got it i was getting 18 with a ATS CHIP on the back of the computer , it went down slowly every time i filled up
and i have some 33" mud grapplers with 20s 2" lift
4 door short bed...
Last edited by 7.3 "Smokey"; 06-30-2011 at 02:31 PM.
Reason: no one helped lol