• 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.

2.9 Injector Wiring.....


a31ford

Electronics GURU
Supporting Member
Article Contributor
Joined
Apr 15, 2012
Messages
571
Reaction score
26
Points
28
Location
Brandon, Manitoba
Vehicle Year
1988
Make / Model
Ford
Engine Size
2.9
Transmission
Manual
Morning All..

With a firing order of 142536, one would assume that the 2 sets (A & B) of injector wires from the ECM would be connected to 142, 536 respectively.

Is my 2.9 wired weird IF, it is NOT the above ?

currently it's 324, 156

This makes NO sense to me.... (Help Please)

Greg
 


adsm08

Senior Master Grease Monkey
Supporting Member
Article Contributor
Ford Technician
TRS 20th Anniversary
Joined
Sep 20, 2009
Messages
34,623
Reaction score
3,613
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
The 2.9 uses a batch fire system. 123 and 456 fire as groups. Cylinder 1 needs fuel, 123 fire. Cylinder 3 needs fuel, 123 fire.

All injectors share a common power buss and the banks are fired by the PCM providing ground to the desired bank. Given that, the injector harness only contains 3 actual circuits, power, bank 1 ground, and bank 2 ground.

One of the things that makes viewing the harness tricky is the physical arrangement of the injectors. They are slanted and form an X pattern as viewed from the front, so the plugs for bank 2 are actually on the same side as the bank 1 spark plugs.

Also, not trying to be a dick, just trying to make sure we are all calling everything the same thing since not everyone gets it right, Ford's cylinder arrangement is:

Front of vehicle
4 1
5 2
6 3
 

a31ford

Electronics GURU
Supporting Member
Article Contributor
Joined
Apr 15, 2012
Messages
571
Reaction score
26
Points
28
Location
Brandon, Manitoba
Vehicle Year
1988
Make / Model
Ford
Engine Size
2.9
Transmission
Manual
Well,

I answered my own question, (but as Im writing this I see that ADSM answered it also, TY BTW)

 

Sponsored Ad


Sponsored Ad

Staff online

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.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

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

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top