Changed fuel filters, MPG tanked

08Monster · Dec 6, 2015

Dealership I bought this truck from (2014 F350) did the maintenance on this truck. The first 2 weeks I had it, it had the old oil, fuel filter, etc. Mileage was a constant 18.5-19. Changed it all today, they used some ****ty ass "mighty" filters and now my mileage is 15.5. Are the filters the culprit? Thanks in advance

08Monster · Dec 7, 2015

ramonpowerstroker · Dec 7, 2015

Use motorcraft fuel filters and report back

08Monster · Dec 7, 2015

ramonpowerstroker said:
Use motorcraft fuel filters and report back

So you are thinking the fuel filters are the culprit? Should I make the change to OEM?

TyCorr · Dec 7, 2015

ramonpowerstroker said:
Use motorcraft fuel filters and report back

08Monster said:
So you are thinking the fuel filters are the culprit? Should I make the change to OEM?

It looks like thats exactly what he is saying.

Seen issues like this over and over...and over LOL

One guy at work kept buying wix filters for his lly. Idled rough and would throw codes and limp the truck. Its common knowledge on the interwebz but he wouldnt listen. So I let him brush the advice off. Hey, if saving a few bucks on a fuel filter is worth 25mph top speed a few trips a month, go for it. Not you, the guy I work with. My buddy did the same thing but when his started up and began chugging after two days he remembered and got a gm fuel filter and g2g.

cmrizzo_79 · Dec 8, 2015

FYI, after a fuel filter change at the dealer, don't buy the "it smess like diesel because we changed the filter" comment. The new filter they used had a crack in it and in the 5 mile round trip to get back to the dealer after I noticed the diesel smell getting worse resulted in 1/8 of a tank gone..... Not related, but thought I'd let y'all know to pop your hood and check defore leaving the dealership.

lincolnlocker · Dec 8, 2015

08Monster said:
Dealership I bought this truck from (2014 F350) did the maintenance on this truck. The first 2 weeks I had it, it had the old oil, fuel filter, etc. Mileage was a constant 18.5-19. Changed it all today, they used some ****ty ass "mighty" filters and now my mileage is 15.5. Are the filters the culprit? Thanks in advance

are you tuned and dereeted?

live life full throttle

08Monster · Dec 8, 2015

lincolnlocker said:
are you tuned and dereeted?

live life full throttle

No sir. Bone stock

lincolnlocker · Dec 8, 2015

08Monster said:
No sir. Bone stock

did you have any updated ecm flashes done at the factory like emissions recal stuff... can't remember if that was for all years?

live life full throttle

08Monster · Dec 8, 2015

lincolnlocker said:
did you have any updated ecm flashes done at the factory like emissions recal stuff... can't remember if that was for all years?

live life full throttle

Not since I did the service. I just bought it about a month ago.

lincolnlocker · Dec 8, 2015

08Monster said:
Not since I did the service. I just bought it about a month ago.

any way to monitor rail pressure?

live life full throttle

08Monster · Dec 8, 2015

lincolnlocker said:
any way to monitor rail pressure?

live life full throttle

No sir. No monitor/tuner yet

lincolnlocker · Dec 8, 2015

look into the torque pro app and get a bluetooth adapter off amazon. that is what i use. i started with a 10 dollar cheapy adapter. the app cost like 5 bucks. it works very well and you being stock it will monitor all 4 egt sensors, regen status, fuel rail pressure, tire pressures, wheel speed sensors, a lot of different things that are nice to see for 15 bucks..

however, i did end up buying the propper bluetooth adapter that cost 60 bucks on amazon just because it reads way faster and i thought i was dropping rail pressure way bad but it turned out to be that the cheap adapter wasnt keeping up at the dragstrip.

live life full throttle