So i posted something like this a while back, I moved up to seattle a year ago from TX and sense then my truck seems to have gotten really slugish. I have done all the little things I know ie disconnect the batt for an hour, clean MAF, stuff like that. Any ideas???

 

Move back to Texas!

 

Is it time for plugs? Changed fuel filter or cleaned throttle body?

 

Trust me I'd love to move back!!!!!

 

Cleaning the throttle body, im assuming there is step bye step on here. I have never done it before.

 

https://www.f150online.com/forums/ar...ttle-body.html

 

Damn hoss your good.

 

It's all in our Articles and How To section.

 

Im looking through it and some are saying Ford says not to clean it and sme say you dont have to on the newer trucks????

 

It's my understanding that you clean it. I think the dealer even has a service for it.

 

If you are filling at the same station, change brand and station. I just went thru this with my 4.6. My mileage fell to an all time low of 13 mpg on a 4.6 SCrew that normally gives me 20-24 hiway. I found that apparently the usual station isn't moving gas quick enough and the ethanol was losing it's octane rating that is in the federally mandated formulation. The 87 octane I was buying ended up being a little over 80. I'm even more surprised it started and ran on it. But it was extremely sluggish and fuel mileage seemed non-existent until I changed brands and station. Until they quit using ethanol, and the science says they will have to quit, we'll have to put up with crappy running engines.

 

I was going to say that there might be a problem with the fuel, and octane, but din't think about the ethanol aging.

 

Im not sure on that one. I switch up alot i mean one day i go to like shell then tex then like base or something.

 

Find a local brand that runs well and gets good mileage, then stick with it.