9-10mpg city.....WHY?????

[cchase]

I am not that intrested in black smoke, as I would be with blue,white,grey. With your milliage i wouldnt be surpised if you had bad injector orings, mine went bad right about then and I had a huge drop in milliage, but it wasnt so quick

[FL_SmokinPSD]

Have not changed filter yet, is it hard? probably worth doing all my fluids while im at it. any filters or fluids yall would recommend or or stray away from???

[1badpsd]

could be injectors then mine were gettin bad at 237K my mpg dropped pretty quick to

[sevenmalards]

Originally Posted by FL_SmokinPSD;788858COULD [B

it be the intake temp sensor[/b]???? should i put it right next to intake???

That is a gas motor part, we don't have the mass air flow/intake temp sensor

[cchase]

I use motorcraft fuilds. and filters, its easy to change the filter, its that can right on top of the motor

[bockhold]

Originally Posted by cchase

you got it backwards, the CPS will cause the engine not to run, or to shut down out of nowhere, the truck wont run without it. on the other hand, the fuel filter can get messed up and still pass enough fuel to supply the truck, but not enough to maintain good milliage.

i said that because when the big cps recall was going on, some users on this or another forum said that the cps could cause bad mpgs due to incorrect timing or something else.

[FL_SmokinPSD]

Wow injectors are $$$$$ i hope thats not it, i just went outside and looked top of motor is black and oily lookin but im guessin thats what 233k will leave you with, so start with fuel filter and o-rings?

[samiam]

any fuel seeping into coolant? you would smell it in the reservoir

[NCHornet]

I am late on this one but it looks like CChase is leading you in the right direction. Change the FF, and see if things get better, also look for diesel fuel in the coolant, there will be a slime on the top of the degas bottle. BTW, you can replace just the O rings on the injectors, you don't have to buy new ones, although with that many miles I would at least have them rebuilt, but that's me!!

NCH

[NCHornet]

Originally Posted by sevenmalards

That is a gas motor part, we don't have the mass air flow/intake temp sensor

Wrong !!
The 7.3 does have a air intake sensor.
Maybe you want to check out this part #

MA-F6SZ12A697A

The sensor plugs into the back of the air filter box! Yes just leave it tied up out of the way, or you can drill a hole and mount it in the new intake.

NCH