Swapping 99 Ranger 3.0 FF with 00 Explorer 4.0 - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 07-13-2011
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Icon4 Swapping 99 Ranger 3.0 FF with 00 Explorer 4.0

I am in the process of putting a 1999 explorer 4.0 sohc motor and tranny in my 2000 ranger that originally had a 3.0 flex fuel. I am wondering if anybody has done this swap and could give any pointers. I have the complete explorer. Do i need to swap fuel pump and lines? They also have different brake setups. Should i Swap those parts? Do i need to swap the entire harness including whats behind the dash or just the engine harness? I am trying to get these things covered before i put the engine in that way its easier to do.

The title is backwards it is a 1999 Explorer 4.0 and a 2000 ranger that had 3.0 ff

Last edited by dayton525; 07-13-2011 at 11:59 AM. Reason: Title F up
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Old 07-13-2011
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99~00 3.0 FFV fuel system is spec'd at 55 PSI but the 99 Explorer is calibrated for 65 PSI. Need to bring the Ranger fuel system up to 65 spec to avoid problems.

It is unlikely that the complete Explorer intank pump/regualtor/sending unit will drop into the Ranger tank as a direct swap. If you can find a 65 PSI, non-FFV Ranger pump unit from a similar year to your FFV, that should drop right into the tank but the wiring is a little different FFV vs non-FFV.

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Under the hood, it would be easiest to combine the Explorer PCM and engine/tranny harness with the stock Ranger engine bay harness. The underhood wiring is very similar between these two but may require minor repinning where the harnesses meet. Changing to the Explorer dash, interior and/or engine bay harnesses would create far more problems than it would solve.

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Both of these trucks use the same Type B PATS and the parts should be 100% compatible between the two. If the PCM, PATS Module, Transceiver Module and ignition keys from the same donor Explorer were installed in the Ranger, then the system should work immediately.

However, if the PATS modules and/or keys from the Ranger are used with the Explorer PCM, the system components will need to be "introduced" using a dealer tool. The truck would not be able to be started until this issue was addressed.

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I highly recommend getting two Ford Wiring Diagrams Manuals, one for the Explorer and one for the Ranger. Be sure to get the exact year manual for each. These can be purchased used on eBay for about $10 each.
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Old 07-13-2011
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Bob, given the year of the explorer should he or can he even address the timing chain rattle?
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Old 07-13-2011
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Good point. I wouldn't install a 4.0 SOHC from 2002 or earlier unless I was sure that the camchain tensioner issue had the latest updates performed.
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Old 07-13-2011
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Thanks for the replies. I plan on purchasing the manuals tonight. just looking at the engine wiring harness there is a few plugs that dont match up. Not a huge electrical fan but with the manuals i should be able to figure it out. The ex seems to be a little different brake setup, is there anything to worry about by using the EX computer and ranger braking system?
As far as the timing chain rattle I have read up on it and the explorer didnt seem to be making any of the noises described so im not too worried about that.
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Old 07-13-2011
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There should be only two multipin connectors between the engine/trans harness and the engine bay harness - one is 42 pin and the other is 12 pin. Add the starter cable harness from the battery and that should be it.

As far as I know, the brake system is independent of the Powertrain Control Module. When I swapped in my Explorer engine, the Ranger brakes were unaffected.
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Old 07-13-2011
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Quote:
Originally Posted by dayton525 View Post
As far as the timing chain rattle I have read up on it and the explorer didnt seem to be making any of the noises described so im not too worried about that.
Your truck, your call. Just be aware that the passenger side tensioner faces the firewall and cannot be serviced in the vehicle.
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Old 07-18-2011
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wiring

I've got everything put back together. I am still waiting on the wiring manuals. I changed the plugs on the starter harness all the wires matched up except the 4.0 starter harness has an extra wire green/white stripe which I think goes to the oil pressure sending unit.does anybody know what firewall wire to hook it up to? It. Is the only gauge that's not working. Im sure there are also a few pcm wires that need some attention but The truck starts and drives which is better than expected. If you knew which wires needed switched on the pcm that would save me from waiting on the manuals. Thanks a ton for the help rwenzing.
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Old 09-17-2011
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Quote:
Originally Posted by dayton525 View Post
Thanks for the replies. I plan on purchasing the manuals tonight. just looking at the engine wiring harness there is a few plugs that dont match up. Not a huge electrical fan but with the manuals i should be able to figure it out. The ex seems to be a little different brake setup, is there anything to worry about by using the EX computer and ranger braking system?
As far as the timing chain rattle I have read up on it and the explorer didnt seem to be making any of the noises described so im not too worried about that.
Wow, wish I seen this earlier.
Did this swap 99 ranger 3.0 to 4.0 Sohc
4.0 had 100000 miles on it, did the swap and dam if it didnt rattle.

So replaced all the chains, guides and all 2 months ago or less.

last several weeks was hearing a tick, investigated today and removed valve cover. Rear guide bolt broke and top of guide center top broke. This is not on tensioner side but opposite. I can honestly say this truck is great and with SCT custom tuned. Its a power house. This engine will be come out soon and 5.0 is going in.

Love the motor power but it's the worst mistake I ever have made. 3500 total ytd
good luck
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