• 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.

does 2.9 v6 have a fuel pump relay?


stamina

Well-Known Member
Joined
Nov 20, 2021
Messages
227
City
Wilmington, NC
Vehicle Year
1990
Engine
4.0 V6
Transmission
Manual
Total Lift
4” suspension
Tire Size
265/75/r16
My credo
built her in a storage unit
does the 2.9 have a fuel pump really and if so where and what. thanks!
 
Yes it does
In 1990 Ranger it should be UNDER the engine fuse box, like this: https://www.2carpros.com/forum/automotive_pictures/12900_fp_12.gif

Picture here: https://www.explorerforum.com/forums/attachments/relay-jpg.35945/
They are color coded
The Green one is Fuel Pump relay, Brown is the EEC(computer) relay, Black one is only there if you have AC, WOT relay, it turns off AC Compressor when you press down gas pedal all the way(wide open throttle) to give driver extra power to pass or...........??

The EEC Relay powers most of the engine systems and the computer, also powers the fuel pump relay, NOT the pump just the relay, Key ON activates the EEC relay


1990 is OBD1 so will have an OBD1 connector in engine bay, usually by the fuse box
The OBD1 connector has a test slot for fuel pump relay

Look here: https://www.therangerstation.com/tech_library/OBD_I.shtml
2nd drawing is the OBD1 connector
Fuel Pump Slot is shown
If you GROUND that slot and key is ON, then you should hear the fuel pump relay "click" on, and fuel pump should start as well
Fuel pump will stay on until you remove the ground in that slot, or turn the key off, doesn't hurt anything
The computer normally grounds that slot(on the back) to control the fuel pump relay

Computer only grounds the fuel pump relay for 2 seconds, just after key is turned on
It will NOT ground it again until RPMs are above 400, engine started, cranking speed is only 200rpm
But you can turn key OFF and then ON again to get 2 more seconds, as much as you want
Or Ground the slot, lol
 
Last edited:
Yes it does
In 1990 Ranger it should be UNDER the engine fuse box, like this: https://www.2carpros.com/forum/automotive_pictures/12900_fp_12.gif

Picture here: https://www.explorerforum.com/forums/attachments/relay-jpg.35945/
They are color coded
The Green one is Fuel Pump relay, Brown is the EEC(computer) relay, Black one is only there if you have AC, WOT relay, it turns off AC Compressor when you press down gas pedal all the way(wide open throttle) to give driver extra power to pass or...........??

The EEC Relay powers most of the engine systems and the computer, also powers the fuel pump relay, NOT the pump just the relay, Key ON activates the EEC relay


1990 is OBD1 so will have an OBD1 connector in engine bay, usually by the fuse box
The OBD1 connector has a test slot for fuel pump relay

Look here: https://www.therangerstation.com/tech_library/OBD_I.shtml
2nd drawing is the OBD1 connector
Fuel Pump Slot is shown
If you GROUND that slot and key is ON, then you should hear the fuel pump relay "click" on, and fuel pump should start as well
Fuel pump will stay on until you remove the ground in that slot, or turn the key off, doesn't hurt anything
The computer normally grounds that slot(on the back) to control the fuel pump relay

Computer only grounds the fuel pump relay for 2 seconds, just after key is turned on
It will NOT ground it again until RPMs are above 400, engine started, cranking speed is only 200rpm
But you can turn key OFF and then ON again to get 2 more seconds, as much as you want
Or Ground the slot, lol
sick bro thank you!
 

Sponsored Ad


Sponsored Ad

TRS Events

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Ranger Adventure Video

TRS Merchandise

Follow TRS On Instagram

TRS Sponsors


Sponsored Ad


Sponsored Ad


Amazon Deals

Sponsored Ad

Back
Top