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  1. M

    2 cylinder miss

    You say the cylinders are "low"... Give us the numbers for all cylinders so we can see what you are seeing. + or - 10 lbs is acceptable. Are these three cylinders 40 lbs light? I will also say, it is difficult to get a good traditional compression test done on these engines with the spark plug...
  2. M

    So the Dealer said: "You Need a New Engine"

    Most dealer service departments and regular shops for that matter do not have "mechanics" working for them. They are simply "parts replacers". Sure, it would have fixed your problem, but they just do not have the knowhow to actually repair anything.
  3. M

    2000 Expedition 5.4 4x4 P0171 & P0174

    For anyone following, I will let you know the problem appears to be solved. After removing the intake manifold and inspection revealed NO cracks but the gaskets appeared that they could allow undeterred air in, I replaced the gaskets and put it all back together. Just for good measure, I soaked...
  4. M

    2000 Expedition 5.4 4x4 P0171 & P0174

    Yes, I cant stand that I cant see the manifold well enough to be certain that it is not the problem. Once removed, I will thoroughly clean it and inspect it for cracks. I was not impressed with the condition of the upper gasket. the amount of dirt on top of the gasket where you would expect it...
  5. M

    2000 Expedition 5.4 4x4 P0171 & P0174

    Yes, I cleared the codes. In fact, right now there are no codes. But, I can see the idle run up to 2200 rpm at start up and see the LTFT go to 25% after getting to closed loop running. So, the codes will come back given enough time. I checked the EGR valve today. I removed it and applied vacuum...
  6. M

    2000 Expedition 5.4 4x4 P0171 & P0174

    I appreciate the input Gumbyalso. I am leaning heavily in that direction. Did you get your replacement manifold from Ford or one of the local parts houses? Also does anyone know if a 1998 5.4 manifold would fit on a 2000 5.4? I also have a '98 and it's manifold is aluminium instead of plastic.
  7. M

    97 expedition 5.4 stumble at 1300 - 1500 rpm

    watching...
  8. M

    2000 Expedition 5.4 4x4 P0171 & P0174

    I have edited the original post to add additional tests and observations I have done today.
  9. M

    2000 Expedition 5.4 4x4 P0171 & P0174

    I have been through all of this too... I fear I am about to remove the intake manifold and inspect for cracks.... The carburetor cleaner test did not find any.
  10. M

    2000 Expedition 5.4 4x4 P0171 & P0174

    I went through every bit of that a few times... no questions answered but I did learn a lot. That guide is why I upgraded and bought a scanner with live data.
  11. M

    2000 Expedition 5.4 4x4 P0171 & P0174

    It is a 2000 model EB. 175k miles. The O2 sensors look new... like the previous owner could not figure it out either. He was a scammer. He had a 1998 transmission in it and told us it shifted hard because it needed a speed sensor. I ended up finding the '98 transmission has no place to put that...
  12. M

    2000 5.4 4x4 P0171 & P0174

    I was not sure where was more appropriate to post this. I will delete it if I can.
  13. M

    Best fuel additive for carbon deposit removal?

    I will say Seafoam as well. However, Lucas just came out with a competitive product. I work for a major retail auto parts store and can see no difference between the two products. Check out the related video....
  14. M

    2000 Expedition 5.4 4x4 P0171 & P0174

    I think I got these codes right, but they equate to Lean on banks one and two. Eventually, I get the codes for Bank 1 & 2 Oxygen sensors lack of switching indicating lean condition. When I start this truck up it revs to 2200 rpm and takes a bit to come down. I have done the basics as far as...
  15. M

    2000 5.4 4x4 P0171 & P0174

    Deleted by author.
  16. M

    Replace 4R75E in an 04 with 2000 4R100?

    Well, a month ago, I would have bought the engine and tranny, if you were closer but I got my parts I needed. The thing is they are pretty durable drive trains and there is not much demand yet for used ones. I paid $300 for a 118k mile Transmission.
  17. M

    Replace 4R75E in an 04 with 2000 4R100?

    You would also have to change the drive shafts as they are different lengths due to the size (length) difference between the two transmissions. Honestly, you would have to probably do a lot of side by side comparisons to ensure your '04 can accept the 4R100... there may be a reason they quit...
  18. M

    99 Expedition AWD Front Drive Shaft Question. Very Confused

    Look at your vehicle data sticker in the door. If you have the 4R100 then the transmission code will be an "E". I also believe the 4R100 was only used with 5.4L models and the 4.6's got the smaller 4R70w.
  19. M

    4R100 vs 4Rw70

    I only know this because I bought a 2000 Expy that had it's trans replaced but had a OSS sensor circuit malfunction code. I dug into it and the damn tranny did not have anyplace to put one but the wiring harness was hanging there over the tranny for them. I pulled the Tranny and found it was a...
  20. M

    round gasket between trans and transfercase?

    You can get gasket material (paper stock) from your local auto parts store and make one. Nothing special about it.
  21. M

    Help!!

    Sounds like a warped brake rotor.
  22. M

    4R100 vs 4Rw70

    The 4R100 in 1999 and older does not have a TSS. In 2000 and up it does.
  23. M

    4R100 speed sensors (TSS/OSS)?

    For what it's worth, I found out my Transmission without the two speed sensor ports is for a 1998 - 1999 model 4x4 Ford with the 5.4L I have since found a 2000 model with the ports and am swapping them now. what a job...
  24. M

    99 Expedition AWD Front Drive Shaft Question. Very Confused

    Yes, the 4R100 is significantly longer... It's also a heavy pig. Swapping one right now.
  25. M

    4R100 speed sensors (TSS/OSS)?

    I recently bought a 2000 EB 5.4L 4x4 Expy and was told by the seller it needed a transmission speed sensor even though the transmission had been replaced. I test drove it to my local Autozome to have the codes read and sure enough P0720 (output shaft speed sensor circuit malfunction. I took the...

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