• Welcome to the Contour Enthusiasts Group, the best resource for the Ford Contour and Mercury Mystique.

    You can register to join the community.

Injector Wiring Harness

D

Detroit3series

CEG'er
Joined
Dec 24, 2012
Messages
179
Location
Detroit, MI
I was cleaning my LIM and head ports before I put my freshly powder coated UIM and noticed when I had to move the injector harness there is a lot of wires that I can see have cracking insulation or beginning to expose copper. I had read about being careful with this harness and I was. I'm kinda glad I caught it now instead of trying to troubleshoot a no start issue with the UIM back on. My question is what's the best way to fix this? At first I was thinking backing wires out of connector and heat shrinking them but its quite a few. Could this be a good salvage yard item I should start looking for?
 
The easiest way to fix it is probably to replace the harness. More than likely your main engine harness has some cracking insulation as well. Your best bet is probably to get a good harness from the junkyard if you can find one. You can replace the injector harness with one from a Cougar or Contour/Mystique. You can replace it with a returnless fuel system harness as well but there are some differences (injectors, oil pressure sensor and fuel pressure sensor). I've done this on a few cars due to having extra returnless parts.

Another option is getting a reworked harness from svttour on here. He builds a nice plug and play engine harness and I'm sure he has injector harnesses as well.
 
Well I'm always interested in easy upgrades. Did any years have a returnless system to take a harness from a salvage yard? I could just grab the other sensors.

Sent from my Nexus 4 using Tapatalk
 
Late 99 and 2K SVTs. Never mind looks like its a more than injectors, oil & fuel pressure sensors that's different too.

Sent from my Nexus 4 using Tapatalk
 
99Mystique ATX said:
The easiest way to fix it is probably to replace the harness. More than likely your main engine harness has some cracking insulation as well. Your best bet is probably to get a good harness from the junkyard if you can find one. You can replace the injector harness with one from a Cougar or Contour/Mystique.
Click to expand...

Is there a difference in the harness between years?

Sent from my Nexus 4 using Tapatalk
 
Just left the Pull-a-Part salvage and found a 99 SE with a harness in good condition. I'm just wondering to use it will it still need modification to be used in an SVT.
 
The differences between a return and returnless fuel injector harness are as follows...

Oxygen sensor connector is different
EV1 (return) Fuel Injector Connectors vs. EV6 (returnless) (easier to swap injectors than splice harness)
Oil pressure sensor (I cut and use the connnector that matches the one on the car, you could also swap the sensor but run the risk of it leaking)
Fuel pressure sensor, there isn't one on a return car so just leave it unplugged
 
99Mystique ATX said:
The differences between a return and returnless fuel injector harness are as follows...

Oxygen sensor connector is different
EV1 (return) Fuel Injector Connectors vs. EV6 (returnless) (easier to swap injectors than splice harness)
Oil pressure sensor (I cut and use the connnector that matches the one on the car, you could also swap the sensor but run the risk of it leaking)
Fuel pressure sensor, there isn't one on a return car so just leave it unplugged
Click to expand...

Everything sounds pretty easy. I'm assuming I could just cut off the existing O2 sensor and splice in the one from my 98?

Also, I noticed some replace the harness from those 3 connectors by the p/s switch and some replace the harness completely from the box. I'm just wondering is it any trouble spots in the harness further back from where the p/s switch is I should check out?
 
that whole harness from the pcm to the driver side strut tower is problematic. hence my harness conversions. I just want to let you know that if you decide to tackle this project alone a return less main harness will NOT work without extensive modification. Also it isn't as easy and cutting and splicing connector plugs either.
 
svttour said:
that whole harness from the pcm to the driver side strut tower is problematic. hence my harness conversions. I just want to let you know that if you decide to tackle this project alone a return less main harness will NOT work without extensive modification. Also it isn't as easy and cutting and splicing connector plugs either.
Click to expand...

Got it. Now my other question is were there any return-style contour/mystique/cougars that didn't have this terrible wire harness issue? That would be my best bet. I just spent quite a bit of money. I'm guessing I could use that on a CSVT with no issues?

Sent from my Nexus 4 using Tapatalk
 
A 99 return style harness will not give you this issue however there is,modifications to be made in order for to work on the rjl1 ecu.
 
Is the issue internal pats module vs external pats module?

RJL1 was the 98 SVT ecu. I believe 98.5 got the SFG0 and SFG2 PCM which had internal pats. I've never done a main engine harness swap or conversion so Sam will be a lot more help with that one. Injector harness I've done several times but never had to do a main harness swap. I know at one point Ford was replacing them but it'd be pretty tough to find a replaced harness as I've only seen one or two of them.
 
Correct. And for the reasons above that's why the newer 99 style return harness needs modification.. Thus again stating my harness conversions.
 
99Mystique ATX said:
Is the issue internal pats module vs external pats module?

RJL1 was the 98 SVT ecu. I believe 98.5 got the SFG0 and SFG2 PCM which had internal pats. I've never done a main engine harness swap or conversion so Sam will be a lot more help with that one. Injector harness I've done several times but never had to do a main harness swap. I know at one point Ford was replacing them but it'd be pretty tough to find a replaced harness as I've only seen one or two of them.
Click to expand...

Maybe I'll only use the injector harness from a 99 instead of the from the PCM. As far as I can see that's not exposing wire.
 
You must log in or register to reply here.
Back
Top