4.0 to 4.0 swap - 6 Cylinder Gasoline - Ranger Engine Tech

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Posted: Mon Apr 16th, 2018 10:16 pm

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JAMMAN

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If it EVER gets warm, my first task it to drop a 4.0 OHV from a 99 expo in to a 98 Ranger XLT born with a 4.0 OHV

Staring at both of these for a while they seem completely identical.

Going 99 to 98 should I use the ECU from the expo or leave the ranger one in there? My first thought is it will be OK with the ranger ECU. Anyone had to deal with this before?

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Posted: Mon Apr 16th, 2018 10:45 pm

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Tsquare
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I don't know the differences but if they are both SOHC then anything that is different needs to be pulled off the old motor and swapped over to the replacement. Stick with the original ECU.

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Posted: Mon Apr 16th, 2018 10:47 pm

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Dusten
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I thought the heads changed in 98. So you should be fine.

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Posted: Tue May 22nd, 2018 08:42 pm

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black06xlt
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JAMMAN wrote:
If it EVER gets warm, my first task it to drop a 4.0 OHV from a 99 expo in to a 98 Ranger XLT born with a 4.0 OHV

Staring at both of these for a while they seem completely identical.

Going 99 to 98 should I use the ECU from the expo or leave the ranger one in there? My first thought is it will be OK with the ranger ECU. Anyone had to deal with this before?
Check the part numbers on the ECU in both trucks. Let me know what they are if they are different. If they have different numbers which I'm sure they do the interchange is more then likely going to be the same. I'll run the numbers at work to verify. Rangers and Explorers are basically the same until you get into Eddie Bauer's and the Limiteds then changes a ton

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Posted: Wed May 23rd, 2018 09:32 pm

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410customs

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keep ranger ECU
98-99 should be identical in every way even going explorer to ranger AS LONG AS THEY BOTH have a single fuel line
Also the Ranger is a automatic or 5 speed?
Explorer was a auto? (assume most ex are auto)

Let me know answers to above

Yes I have dealt with this kind of thing before, several times
I would plan to:

Use your ranger 98 engine wiring harness
replace the intake plenum O rings (at the very least)
Check the camshaft synchronizer plug in make sure they are both the same wiring plug in

strip the new expo engine down to the lower intake and install it in the truck
then dress the engine up using your 98 ranger fuel rail, injectors, sensors, intake, plumbing, wiring etc
should be a very straight forward conversion as long as both engine have return less fuel, otherwise you just have to swap fuel rails and possibly a couple of dash sensors

Last edited on Wed May 23rd, 2018 09:35 pm by 410customs

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