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V8 swap thread discussion

Discussion in 'Modified 1995-2001 Explorers' started by 96ex5.0, February 24, 2015.

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    1. rangerbill61

      rangerbill61 New Member

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      Hey thanks for input, no I didn't move any pins at transfer plug..but I did move some pins at c115/ ranger plug. According to shop computer all sensors work, which is good. I'd like to get the trouble codes fixed
       
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    3. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      It's possible you can(and are done) make the changes at that connector farther up, but definitely find the diagrams to compare the original wiring to the changed parts.
       
    4. rangerbill61

      rangerbill61 New Member

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      Ya, I'm trying to read diagrams to know what pin 20 was connected to on mountaineer. That may be issue with trans code? Knowing what high input means would help also
       
    5. rangerbill61

      rangerbill61 New Member

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      I thought since engine, trans, pcm and wiring all came out of same vehicle, 97 mountaineer along w/transfer case the wiring should be good and only changes would be at c115 conn? Trans switch plug was on trans from factory. Am I wrong about this
       
    6. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      What is the dash and engine bay harness, from your Ranger, or how did you mix those harnesses into the vehicle?

      Look at a 97 Explorer/Mountaineer wiring EVTM manual etc, the Explorer may be easier to find things about(though they are identical to Mountaineer).

      Note that there are wiring changes during 1997, early versus late. Which do you have, the early is a GT40(not GT40P) and has a dead flat top EGR elbow on it? GT40P's have an EGR pipe to the exhaust manifold.
       
    7. rangerbill61

      rangerbill61 New Member

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      Ok, the engine has pipe coming off pass side exhibition to egr. I used engine harness and plugged it to engine bay harness like 3.0 was, they are same plug but some wires are different. All dash gauges work, tach works but not sure if it's set right for v8 yet. Saw a site where they said a pin needs moved?
       
    8. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      Okay, you should be(and have been) tracing the wires from the engine harness to the bay and dash harnesses. That's a GT40P system and good because the majority of it matches 98 wiring, and 99-01.

      It's closer to those than the 96-97.5 PCM wiring, except that 1998 got those trans changes mentioned before. The 98+ 4R70W has some little upgrades in it, and they made the electrical connectors inside incompatible, thus a new external connector color and wiring arrangement.

      You can rely on most of it to be virtually identical to 1998 wiring, except for the many changes made to the vehicle as upgrades(not to the engine(the engine stuff is the same for 98 versus late 97)). 1998 got a lot of changes like green dash lights, different GEM modules etc, but the engine stuff remained the same except for adding PATS.

      That may help you if you find references to wiring of a 98 Explorer, just remember that you have the trans wiring of a 96/97 4R70W. Since your CEL code points to a trans issue, I'd keep double checking all of those trans circuits.
       
    9. rangerbill61

      rangerbill61 New Member

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      Hey thanks man, alot of it does match. I got 2 manuals, 1 for 98 ranger electrical and vac diag, and same for 97 mountaineer evdiag. I'll keep tracing and reading and enjoying the added horsepower and sound of the exhaust lol thanks again
       
    10. rangerbill61

      rangerbill61 New Member

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    11. rangerbill61

      rangerbill61 New Member

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      Ok, I must have been really tired when I was researching the wiring..pin 20 is on both connectors and it's for clutch posted sensor on both, I don't got a clutch. However pin 13 on engine side of c115 is vss and sat the moment it's got a wire that is for heater/air hooked up to it on truck side. Lol. So I got to look at diagrams for ranger find vss wire and move it..more. to come
       
    12. rangerbill61

      rangerbill61 New Member

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      Ok
       
    13. rangerbill61

      rangerbill61 New Member

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      Ok, now I get why I read that a good diagram book is essential if u go efi with 302 swap. The vss isn't in same location on vehicles and it's wired a bit different. Got to move a couple wires..wondering if that could b screwing with trans range switch and that's why I'm getting both codes?
       
    14. rangerbill61

      rangerbill61 New Member

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    15. rangerbill61

      rangerbill61 New Member

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      Ok, I did move a pin, from no 7 to 13, the thing I'm finding is pin 7 is a wire coming out of vss and goes to cruise control servo, pin 13 is wire going into vss. Trying to read diagrams and figure out if it was good move? The wire I took out of pin 13 was heater a/c wire so it shouldn't be there either way. Wiring is giving me a headache
       
    16. old_coot

      old_coot New Member

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      Well...here we go again....I'm about to start my swap and find all this info most helpful....I have a 2001 sport and a 2001 explorer with a 5.0...my plan is to swap everything including computer wiring, transmission and transfer case.....THEN get stupid and try to shoehorn a 408 stroker in place of the 5.0...wish me luck.
       
    17. vroomzoomboom

      vroomzoomboom Elite Canuck STOCK SUCKS! Elite Explorer

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      if you have the same year donor, going into the same year truck your swapping to, its a very strait forward swap (plug to plug, bolt to bolt ect.). your tac will more then likely be out, but in the v8 swap tread i did, it shows how to fix that. the only difference will be your ac, and oil sending.
      as for a 408, if i am correct, that is based off a 351w block. there are some differences within the bock itself (taller, wider). the cam syc will be difference (302 is shorter so you would have figure out how to make one using different parts) the explorer lower intake will not fit (351w is wider at the top) and the oil pan will not fit (once again, wider, and the main crank cap at both front and back are bigger). lastly, the exhaust manifolds will need to be reworked.
      im not saying its impossible, but it will be some work. i would love to see someone jam a 351w into a 2nd gen. i have thought about it, but wouldnt have the patience to figure out all the little problems you would have with it.
      i have replaced the 302 with a 347 (it was in another members truck that i bought) and it was instant smiles everytime you'd smash the gas peddle down!
      good luck and kept us posted
       
    18. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      Go for it, do the V8 swap first and enjoy that for a short while. There are a couple of people who have done most of the fabrication work to install a 351W, but they didn't quite finish theirs due to different issues. The pan modifications were the biggest part, besides the obvious exhaust manifold mess. Turdles old truck has a thread here from the last owner who got it close before reversing and selling the truck.
       
    19. old_coot

      old_coot New Member

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      Thanks guys...and I do anticipate having some issues with fabrication of some parts...but thats what I do for fun now that I'm retired so this should be a good time....my thinking is since both vehicles are 2001, I'm hoping to just use the entire wiring harnesses and instruments out of the explorer into the sport along with computer and everything....Once the swap is done and bugs worked out on the V8...then the 408 will get dropped in....What headers did you fellows use for the swap...the stock explorer manifolds are not going to get it done...they are ugly...
       
    20. vroomzoomboom

      vroomzoomboom Elite Canuck STOCK SUCKS! Elite Explorer

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      torque monster headers went in with the motor. lucky for you that are being produced again. bob stop doing them for a few years, but is back doing them now.
       
    21. Rb275d

      Rb275d New Member

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      I am doing this swap between 2000 explorer 5.0 and a 2003 sport trac. The sport trac has pats E and the explorer has pats B. I have the key halo and the transponder but have no clue how to wire this to work. Any input or help would be awesom.
       

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