• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

At a stand still in my 4.0 swap. need guidance

rangerbum

New Member
Joined
Apr 22, 2008
Messages
1,412
Reaction score
29
Points
0
Age
30
Location
Kalispell, Montana
Vehicle Year
85
Make / Model
Ford
Engine Size
2.8l
Transmission
Manual
Hello, I've been in the process of swapping a 92/93 explorer 4.0 into my 85 BroncoII for what seems like an eternity. I've got the majority of the work done. Now I'm halted by the wiring because I'm a newb at wiring.

I understand I'll have extra connectors left over, but am unsure of exactly what all is required. I'll strip down the harness later. I was unable to get a dash from newer donor.

I'm a couple weeks from the deadline I set myself. And have plans with the rig May 3,4,5.

It will not be seeing time on public roads, just off road. I am not concerned about the gauges other than temp and oil pressure. Fuel gauge never worked, Speedo is twitchy.

I just want this bugger to run.

I have the harness that goes to the ecu in and hooked up to everything that I can find, but am unsure how it connects to the harness with the distribution box and lights, and big white plug. I lack confidence and want my baby back in the sand and dirt, and out of the garage!
 


SenorNoob

Well-Known Member
TRS Event Participant
Joined
Oct 24, 2012
Messages
1,982
Reaction score
170
Points
63
Location
Middle Tennessee
Vehicle Year
1988
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
1.5" Front + 4" Rear
Tire Size
245-70-R16

adsm08

Senior Master Grease Monkey
Supporting Member
Article Contributor
Ford Technician
TRS 20th Anniversary
Joined
Sep 20, 2009
Messages
34,621
Reaction score
3,580
Points
113
Location
Dillsburg PA
Vehicle Year
1987
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Tire Size
31X10.50X15
If you had gotten a donor dash it would be pretty much plug and play, especially for an off-road only vehicle, because the biggest difference is in the lighting wires.

Unfortunately for you, you are up against the hardest part of the 4.0 swap, which is the wiring.
 

rangerbum

New Member
Joined
Apr 22, 2008
Messages
1,412
Reaction score
29
Points
0
Age
30
Location
Kalispell, Montana
Vehicle Year
85
Make / Model
Ford
Engine Size
2.8l
Transmission
Manual
Thanks guys, I'm getting closer. Need to get a new fuel filter, New wires for my pump, and a flange to connect the rest of my exhaust to my y-pipe. After that I'll try to wire my starting/charging system, tighten my fan back up, and drop in the radiator. Really hoping I can have it running this weekend. I'd like to have a test week to find the quirks before its big break-in.
 

rangerbum

New Member
Joined
Apr 22, 2008
Messages
1,412
Reaction score
29
Points
0
Age
30
Location
Kalispell, Montana
Vehicle Year
85
Make / Model
Ford
Engine Size
2.8l
Transmission
Manual
All the harness really makes quite an interesting spider web under the hood.
 

rangerbum

New Member
Joined
Apr 22, 2008
Messages
1,412
Reaction score
29
Points
0
Age
30
Location
Kalispell, Montana
Vehicle Year
85
Make / Model
Ford
Engine Size
2.8l
Transmission
Manual
Now I can't even find the wires that go to my camshaft position sensor. What do they stem off of?

After taking off my upper intake and digging around I'm starting to think it simply doesn't have one. The engine has the camshaft position sensor, but absolutely no connectors matching it. The engine and harness came from a 92 explorer. Should a 92 have that sensor?
 
Last edited:

rangerbum

New Member
Joined
Apr 22, 2008
Messages
1,412
Reaction score
29
Points
0
Age
30
Location
Kalispell, Montana
Vehicle Year
85
Make / Model
Ford
Engine Size
2.8l
Transmission
Manual
If I were to wire up the fuel pump as an accessory instead of the stock harness would it function properly? I need this thing running, the factory look is not important. I don't care if I have to have a toggleboard for all my components.

Which starter relay should I use, the 85 2.8 relay or 92 4.0? And what all do I need to hook up for it to operate? When I bought my b2 it had a push button start wired in so the factory stuff is hacked.

In theory, as long as fuel pressure is correct, and the engine harness has power it will regulate ignition, injector timing, and air fuel mix right? So the fuel pump and starter don't necessarily need to be in the same circuit?
 

bobbywalter

TRS Technical Staff
V8 Engine Swap
TRS Technical Advisor
TRS Banner 2012-2015
TRS 20th Anniversary
TRS Event Participant
Joined
Aug 9, 2007
Messages
22,315
Reaction score
2,846
Points
113
Location
woodhaven mi
Vehicle Year
1988
Make / Model
FORD mostly
Engine Type
V8
Engine Size
BIGGER
Transmission
Automatic
2WD / 4WD
4WD
Total Lift
sawzall?
Tire Size
33-44
My credo
it is easier to fix and understand than "her"
well, depending on the build date if its a late 92 you may or may not have a cam sensor.

if its an early stlye, it only has the vrs that goes to the edis module.


in this case, just take the harness intact for the 4.0 and lay it in there and run a switched power jumped to the backside of the eec diode in its power dist box, then you can tie the fuel pump you have into its fuel pump side and that should get you out back having fun and getting stuck.


you may also have to tie that switch power to the radio noise filter side to turn the power on for the edis as well, just depends on how that harness is setup.


i would incorporate the starting relay and wiring for the 4.0 as well.
 

bobbywalter

TRS Technical Staff
V8 Engine Swap
TRS Technical Advisor
TRS Banner 2012-2015
TRS 20th Anniversary
TRS Event Participant
Joined
Aug 9, 2007
Messages
22,315
Reaction score
2,846
Points
113
Location
woodhaven mi
Vehicle Year
1988
Make / Model
FORD mostly
Engine Type
V8
Engine Size
BIGGER
Transmission
Automatic
2WD / 4WD
4WD
Total Lift
sawzall?
Tire Size
33-44
My credo
it is easier to fix and understand than "her"
vrs is variable reluctance sensor...the crank shaft sensor.
 

SenorNoob

Well-Known Member
TRS Event Participant
Joined
Oct 24, 2012
Messages
1,982
Reaction score
170
Points
63
Location
Middle Tennessee
Vehicle Year
1988
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
1.5" Front + 4" Rear
Tire Size
245-70-R16
the hardest part of the 4.0 swap, which is the wiring.
I found actually moving the engine to be much harder than the wiring. Wiring was just time consuming. Moving an engine with a wheelbarrow and a chain hoist on a homemade wooden arch is hard.
 

rangerbum

New Member
Joined
Apr 22, 2008
Messages
1,412
Reaction score
29
Points
0
Age
30
Location
Kalispell, Montana
Vehicle Year
85
Make / Model
Ford
Engine Size
2.8l
Transmission
Manual
Finally going to have time to work on the bugger again. My fiancee had her ACL reconstructed and life should return to its slightly less busy state. If anyone has any advice on how to simplify this ordeal it would be greatly appreciated. The thought of scrapping it has crept into my mind and it's just not an option.
 

SenorNoob

Well-Known Member
TRS Event Participant
Joined
Oct 24, 2012
Messages
1,982
Reaction score
170
Points
63
Location
Middle Tennessee
Vehicle Year
1988
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
1.5" Front + 4" Rear
Tire Size
245-70-R16
The thought of scrapping it has crept into my mind and it's just not an option.
Please don't do that. Not when you are this close. Just to get it running, all you need is power to the ecu,the fuels pump(s), the o2 sensor heater, and the starter.

All of the sensors should have been plug & play with the harness that you bought.
 

rangerbum

New Member
Joined
Apr 22, 2008
Messages
1,412
Reaction score
29
Points
0
Age
30
Location
Kalispell, Montana
Vehicle Year
85
Make / Model
Ford
Engine Size
2.8l
Transmission
Manual
Okay, 11 strait days of labor at the golf course, fiance had her surgery, I had a root canal, and I finally get 2 days off to work on the bugger. I have dreams of 4x4.
 

Sponsored Ad


Sponsored Ad

Top