Sammy76
Member
- Joined
- September 11, 2011
- Messages
- 23
- Reaction score
- 0
- City, State
- Oregon
- Year, Model & Trim Level
- 2013 explorer xlt
I recently purchased a 2013 XLT 3.5 to replace my 03 expedition. I need something with better mileage than the beast. Anyway, when I bought it the average economy was around 20mpg. A couple days after that I started noticing that the economy was dropping to around 13mpg, the same as the expedition! And it also started idling rough.
After realizing this I hooked up my scanner and forscan, I noticed that the fuel trim is running on the rich side with the ltft being between -3 to-5 and the stft anywhere between 4 to as far off as -26 for both banks. The odd thing is that when monitoring the fuel system to see if it's in open or closed loop bank 1is in closed as expected but bank 2 says error!
Now, I discovered that the previous owner had never changed the plugs or coil packs, it has 120k on it! I plan on replacing all the plugs and coil packs as well as the pcv valve. My question is what would be causing the error on bank 2? Would it be a bad injector or fuel rail? Obviously fouled plugs would affect the gas mileage but badly enough to drop the economy to 13 mpg highway? Any help would be appreciated as googling has gotten me nowhere as far as the error.
After realizing this I hooked up my scanner and forscan, I noticed that the fuel trim is running on the rich side with the ltft being between -3 to-5 and the stft anywhere between 4 to as far off as -26 for both banks. The odd thing is that when monitoring the fuel system to see if it's in open or closed loop bank 1is in closed as expected but bank 2 says error!
Now, I discovered that the previous owner had never changed the plugs or coil packs, it has 120k on it! I plan on replacing all the plugs and coil packs as well as the pcv valve. My question is what would be causing the error on bank 2? Would it be a bad injector or fuel rail? Obviously fouled plugs would affect the gas mileage but badly enough to drop the economy to 13 mpg highway? Any help would be appreciated as googling has gotten me nowhere as far as the error.