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03 explorer I haven't done it myself but it looks easy from looking at the O2 sensors and reading my Haynes Manuel. I believe there are 4 sensors. You may want to pick up a Haynes Manuel. They are worth there money in gold. There pretty much like taking a spark plug out as far as I can see...

Oil It really doesn't matter what type of oil you use as long as it meets Fords expectation. I got away from using their synthetic blend and went with Pennzoil Ultra and I will never go back. Just by changing to full synthetic MPG went from 16.8 to 18.6 and it cleans my engine very well which...

Spark Plugs I had just completed a tune up this weekend in which I replaced plugs that I had put in about 20,000 miles ago. They were Bosch high end plugs. I replaced them with the OEM plugs and I could not believe how much of a difference there was in power and just a better ride over all. I...

So today I figured was a good day to knock out some upcoming 100,000 mile maintenance on my 2003 Explorer 4.0 since I am driving to San Antonio next week. I ordered the parts the other day from Rock Auto and could not believe how cheap everything was. So, I bought plugs, wires, Idle Air Control...

Dealership I would also go to the dealership becasue you know you will get the correct part or 99% sure atleast. LOL.

Blend door actuator Oh yea that is definately the Blend door actuator. Cost me $600.00 to fix at the dealership but, after finding this site I am kicking myself. Could have fixed it myself for $50 or so.

I have a 2003 Explorer 4.0. This doesn't happen every time but it seems to be happening more often. After I have driven for awhile then shut the enigine off then try to start it back up again it doesn't start right away. I have to turn the key off and try again. I was thinking it may be the...