1990 ranger 4.0 swap issues.


jstill

New member
Joined
May 1, 2019
Messages
14
Reaction score
0
Points
1
Location
Hummelstown, PA
Vehicle Year
1990
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
I purchased the truck with the swap done but the previous owner never got the swap running. He told me he has only about 7 volts to fuel pump. When he turns the key nothing happens. The motor will turn over if you jump the seloniod posts it will turn over but doesn’t have spark. Just wondering if there is any one thing I should look at or if I have a series of issues. Any help is good. Thanks in advance!
 


Rock Auto 5% Discount Code: 173A8B749AB83C Expires: January 1, 2020

BlackBII

Ranger Custom
Article Contributor
OTOTM Winner
TRS Banner 2010-2011
Joined
Aug 14, 2007
Messages
7,425
Reaction score
166
Points
63
Location
UT
Vehicle Year
1989
Make / Model
Ford
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
Total Lift
5
Tire Size
33
What year was the donor truck and what engine was in the truck before? Did he swap the whole engine bay harness and computer? I have the wiring diagrams for most years/engines that I can post.
 

RonD

Well-known member
Joined
Jun 2, 2012
Messages
14,011
Reaction score
718
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
+1 ^^^^

1990 is the year of the body and chassis I assume
Look for the computer "he used", does it have 60 wire connector(1990-1994 4.0l) or 104 wire connector (1995-2000 4.0l)
1990-1994 4.0l used separate spark module, EDIS-6

104 wire could be 4.0l SOHC(2001-2011), this engine would have "4.0l SOHC" on the engine cover


And no, there is no one thing
The starter motor activation system has no connection to the computer and/or spark system in any year, except they both use battery power to start working
 

jstill

New member
Joined
May 1, 2019
Messages
14
Reaction score
0
Points
1
Location
Hummelstown, PA
Vehicle Year
1990
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
What year was the donor truck and what engine was in the truck before? Did he swap the whole engine bay harness and computer? I have the wiring diagrams for most years/engines that I can post.
I am trying to get more information on the motor year and what all he swapped. thanks for the help!
 

jstill

New member
Joined
May 1, 2019
Messages
14
Reaction score
0
Points
1
Location
Hummelstown, PA
Vehicle Year
1990
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
+1 ^^^^

1990 is the year of the body and chassis I assume
Look for the computer "he used", does it have 60 wire connector(1990-1994 4.0l) or 104 wire connector (1995-2000 4.0l)
1990-1994 4.0l used separate spark module, EDIS-6

104 wire could be 4.0l SOHC(2001-2011), this engine would have "4.0l SOHC" on the engine cover


And no, there is no one thing
The starter motor activation system has no connection to the computer and/or spark system in any year, except they both use battery power to start workings
the body and chassis is 1990. as soon as I know what year the motor was I will look into those
plugs and spark module. thanks for the help!
 

jstill

New member
Joined
May 1, 2019
Messages
14
Reaction score
0
Points
1
Location
Hummelstown, PA
Vehicle Year
1990
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
What year was the donor truck and what engine was in the truck before? Did he swap the whole engine bay harness and computer? I have the wiring diagrams for most years/engines that I can post.
The motor is a 1991 and the chassis is a 1990. if u have the diagrams that would be great!
 

RonD

Well-known member
Joined
Jun 2, 2012
Messages
14,011
Reaction score
718
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
When you locate the computer look at its label for part number

First two digits are the year
E9 = 1989
F0 = 1990
F1 = 1991
F2 = 1992
ECT up to F8

3rd digit should be 7 for Ranger, i.e. F17 = 1991 Ranger computer
 

BlackBII

Ranger Custom
Article Contributor
OTOTM Winner
TRS Banner 2010-2011
Joined
Aug 14, 2007
Messages
7,425
Reaction score
166
Points
63
Location
UT
Vehicle Year
1989
Make / Model
Ford
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
Total Lift
5
Tire Size
33
Here's the 1991 4.0

 

BlackBII

Ranger Custom
Article Contributor
OTOTM Winner
TRS Banner 2010-2011
Joined
Aug 14, 2007
Messages
7,425
Reaction score
166
Points
63
Location
UT
Vehicle Year
1989
Make / Model
Ford
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
Total Lift
5
Tire Size
33
Here's some more












 

jstill

New member
Joined
May 1, 2019
Messages
14
Reaction score
0
Points
1
Location
Hummelstown, PA
Vehicle Year
1990
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
When you locate the computer look at its label for part number

First two digits are the year
E9 = 1989
F0 = 1990
F1 = 1991
F2 = 1992
ECT up to F8

3rd digit should be 7 for Ranger, i.e. F17 = 1991 Ranger computer
Well we are off to a good start my Ecu matches what the guy told me good year.
 

jstill

New member
Joined
May 1, 2019
Messages
14
Reaction score
0
Points
1
Location
Hummelstown, PA
Vehicle Year
1990
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
I have been looking it over and comparing to the diagrams above. I have found that there is a selonoid on the passenger side of the engine bay that if you jump with a screen driver the motor cranks over. if you jump the selonoid on the start nothing happens it just arks. still nothing happens when you turn the key. just wondering why that other solenoid is there.
 

RonD

Well-known member
Joined
Jun 2, 2012
Messages
14,011
Reaction score
718
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
Starter RELAY may be what you are talking about

It will have the larger Battery positive cable hooked to one larger post, and that post will also have several other wires on it, its the power distribution point for the vehicle.

Then there will be another larger post with just one cable that runs to starter motor

Then a smaller Post with an "S" label, this "S" post activates this relay, the wire on this post comes from the ignition switch VIA the "neutral switch", the "neutral switch" on a manual trans is the Clutch Pedal switch, it passes 12v from the ignition switch(in START position) to the "S" post when clutch pedal is down all the way

If you jumper 12v to the "S" post then starter should activate, even IN GEAR so be careful

Clutch pedal switch seen here: https://www.2carpros.com/forum/automotive_pictures/62217_CPP_1.jpg

Wiring at switch seen here: https://ww2-secure.justanswer.com/uploads/xsvectOR/2011-01-26_193046_1a.gif
 

jstill

New member
Joined
May 1, 2019
Messages
14
Reaction score
0
Points
1
Location
Hummelstown, PA
Vehicle Year
1990
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
Starter RELAY may be what you are talking about

It will have the larger Battery positive cable hooked to one larger post, and that post will also have several other wires on it, its the power distribution point for the vehicle.

Then there will be another larger post with just one cable that runs to starter motor

Then a smaller Post with an "S" label, this "S" post activates this relay, the wire on this post comes from the ignition switch VIA the "neutral switch", the "neutral switch" on a manual trans is the Clutch Pedal switch, it passes 12v from the ignition switch(in START position) to the "S" post when clutch pedal is down all the way

If you jumper 12v to the "S" post then starter should activate, even IN GEAR so be careful

Clutch pedal switch seen here: https://www.2carpros.com/forum/automotive_pictures/62217_CPP_1.jpg

Wiring at switch seen here: https://ww2-secure.justanswer.com/uploads/xsvectOR/2011-01-26_193046_1a.gif
You are correct. I can’t seem to get that to bridge. As in get power from one terminal to the other.
 

RonD

Well-known member
Joined
Jun 2, 2012
Messages
14,011
Reaction score
718
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
If you jumper 12v from battery post to "S" post and starter activates then the Relay is OK, if it doesn't activate then replace relay

If it does activate, then problem is either Neutral switch or ignition switch(under steering column, not key switch)
Neutral switch is more likely in 1990/1 because people liked to jumper them and the added wires would come off, lol

If you replace the relay then makes sure ALL the wires on the "battery post" stay on the battery post side of the relay
 


Top