Hi everyone, sorry if this is in the wrong section?

I need to buy a new MAF sensor for my 2003 5.4 4x4 Expedition - I live in the UK, so I need to buy one online and ship it. I looked on Ebay, and the prices range from $50 to over $300?? and a lot that were new, said 'remanufactored'?

So, does anyone have any advice on what type to buy and where from?

Just as some info - My truck has done 65,000 miles, and I've decided to keep it and spend some time and money on it instead of upgrading - the mpg has got really bad, about 10mpg driving sensible, mainly highway and not over 70mph - and down to 7mpg hauling my Travel Trailer.

I've replaced the vacum lines and elbow, cleaned the MAF and Throttle body, fitted new air filter, new oil and filter, new fuel filter, new plugs and coils (not an easy job!) and replaced all brake pads and checked brake calipers are good (not siezed)

The truck is now running nice and smooth, idle is smooth, revs nice and clean, but still doesn't have the power it used to, and the MPG is better, but still only about 12mpg - so want to try and put in a new MAF sensor to see if that helps.....

Have also just ordered a K&N cold air intake, and Suprchips programmer, and will be going to an exhaust shop this week to ask about removing the rear cats and fitting a better flowing system......

 

If it is idling and running smoothly, I really doubt that a new MAF will change anything. What plugs did you use?

 

To answer your question, if I had to replace the MAF, it would be with Motorcraft only. For that part, I would not risk anything else. That is just me. You might try Tasca online, if you haven't.

 

I can't remember the model, but the make were Bosch and are meant to last 50% longer (not that I'll leave them in longer!) they were in a copper color box - I've been putting off changing the plugs for so long, I bought them in the summer!

It didn't turn out to be as hard as I thought, but still glad I don't have to do them again sometime soon.......................

 

Ok, I hate to tell you this, but if you do a search on this site, you will find that these engines do not get along well with Bosch plugs. They can litrally eat them up. I would run nothing but Motorcraft plugs in a Ford modular engine(unless you are supercharged). I guarantee you the Bosch they will not last half as long as the Motorcraft, in your engine. The Motorcrafts are good up to 100,000, though I would change them at about 75,000. Don't think you can get better than that.

 

My truck had the original motorcraft plugs (except for one) in the engine when I bought it with 200,000 miles. Needless to say another set of Motorcraft went back in.

 

I'd definitly swap out the plugs first thing. Bosch and Champion plugs just suck in mod motors..

 

Is there likely to be any other problems other than lasting less miles? I only do about 5,000 miles a year in the Expedition.

I didn't go for Motorcraft, after I'd Googled and read about them either snapping off, or blowing out (depending on 2v or 3v) - but now I'm wondering if I should have just ordered the Motorcrafts! (I could order the Bosch here in the UK, but Motorcraft would have had to have been ordered from the USA and shipped)

So, I'm guessing, just go with a Motorcraft MAF I'll have a look at Tasca online and see if they will ship here - anywhere else to try if they don't?

 

Swap the plugs first and see if that makes it run better. You can order them from rock auto.com at a discount. Gotta ship them anyway.. As has already been posted its unlikely changing the MAf is going to do anything. That is a part that should last the life of the truck. If its clean it shouldnt be a problem..

 

BTW 12mpg is not far off from "normal" I get around 13 in the winter and my truck runs perfect.

 

have you tried just cleaning the sensor first?

 

WOW, how many broke off when you changed them?


I agree with previous posts, Fords and Bosch plugs don't work well together. Stay with Motorcrafts for the correct heat range, and longest life.

 

Yes, took the housing out of the fliter housing/tube and sprayed it with MAF cleaner (didn't touch the element)

I've had the Expedition for 3 years, and it used to get about 16 -17 highway, driving at about 65mph, but over time it seems to have been loosing power, so I need to keep the throttle pushed down more, which then uses more fuel.

I know the MAF's 'shouldn't' wear out, but on my other car (Merc E320DCI) that needed changing, and improved the fuel by about 15%............so was thinking as I'm now keeping the Expedition, it wont hurt to put a new one in

 

Yea, they don't break in those engines.

 

To properly clean the maf it needs to come out of the housing and a little disassemble is required. there is a how to.. here..
https://www.f150online.com/forums/ar...03-f-150s.html