4.6 build

red_rocket98 · Jun 8, 2015

Ok so I'm taking on the challenge with a 4.6 swap. I have a 2003 mercury grand marquis that got hit and the engine and tranny only have 53k for miles and I have all the guts from it to work with so one of my questions is engine harness to my 1998 3.0 v6 ranger body harness. Any tips on what I need to look at? Should I start from scratch and do my body to fit my engine harness? It's for a prerunner kinda deal.

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red_rocket98 · Jun 9, 2015

No one has anything?

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willy · Jun 11, 2015

The 4.6 requires alot of work to make fit for a breif summary look into the trucks episode rolling thunder but as far as wiring goes study the evtms for both and have at it there not plug n play by any means

red_rocket98 · Jun 13, 2015

willy said:
The 4.6 requires alot of work to make fit for a breif summary look into the trucks episode rolling thunder but as far as wiring goes study the evtms for both and have at it there not plug n play by any means

I already have the motor and tranny in and mounts made I'm trying to figure out the wiring now and I got stumped I knew it wouldn't be a plug n play.

I have a thought if I take out all the bs I don't need and just get the wires that go to the motor to run is this the best route you think?

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willy · Jun 16, 2015

There is a few hurtles with wiring
1. Pats either tune it out or get a stand alone computer.
2. Emissions the stock computer wont like the rangers evap system so the the donor stuff will need to be used or tuned out. Passing an emissions inspection if your state requires it.
3. Vss signal the trans wont shift right if its not getting the correct signal so if it comes from the trans your good but if it comes from the rear axle some reaserch is needed to see if its compatible.
4. The obivious power and ground wires starter and altnator are simple circuits to make work but you will need to find the pins in the engine harness to supply power to the pcm and the grounds it will need a few hours reading schematics will help with that.
5. As far as the ranger body harness is concerned leave it in. You just need to tap into it for check engine light, oil pressure, obd2 plug, coolant temp, and battery voltage. Now as far as if your gauges are compatible with the 4.6 im not sure.
If it were me id focus on fitting that wide pig in the engine bay and get the cooling, power steering, and trans cooler all buttoned up then move to fuel and air. Once thats all buttoned up get a drive shaft in it because theres nothing worse than getting it running and not being able to do v8 burnouts and pissin off the neighborhood. Then start wiring.

willy · Jun 16, 2015

O and send svt a pm he has a wealth of knowledge

red_rocket98 · Jun 17, 2015

willy said:
O and send svt a pm he has a wealth of knowledge

Thank you vary much Willy all you said made vary good sense.

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Lariat · Jun 18, 2015

www.bbbind.com will be your friend. Go to their wiring diagrams. That will help a lot.

4.6 build

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