Mustang Active Exhaust not Working??

[WD Pro]

I don’t know why this is so complicated !

1. Loosen up the catback hangers and unhook them on the passenger side.

2. Loosen the coupler from the mid pipe to the catback on the passenger side.

3. Disconnect the harness for the active exhaust.

4. Remove the passenger side of the catback from the vehicle.

5. Inspect the wiring right before the connector. If it’s frayed a worn through the insulation your exhaust is sitting too far back and you need to move the exhaust towards the front of the car.

6. If you don’t have enough play to move it 1/2” to 3/4” towards the front you need to trim either the catback or midpipe to allow this. If you don’t you will encounter the same problem, it’s only a matter of time.

Extra heat wrap won’t help you, a new harness will fail again, etc….

This

Whoever installed the OP’s exhaust likely caused the problem.

I’ve posted this in the past :

If it helps, I shortened my active exhaust with H pipe by about 16mm total when I fitted the H after my standard system had started to rub.

I made the ‘perfect’ cut, then shortened the cut and the front of the H pipe by about 8mm each.

Right side loom off the standard system had just started to rub :

Before (standard system / standard fitment on the right) v after (modified with H) :

Loom clearance after the mod :

WD

WD

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[greasy]

This

Whoever installed the OP’s exhaust likely caused the problem.

I’ve posted this in the past :




WD

I don’t what it is about a lot of people on this forum, but rather than listen to people who have had the issue before some folks would rather listen to others hypothesize the potential issue.

I’m not sure if it’s arrogance, feeling superior, a closed mindset, or any other mental affliction but it’s frustrating as hell. I feel like I’m banging my head against the wall around here at times

 

[Cobra Jet]

I don’t what it is about a lot of people on this forum, but rather than listen to people who have had the issue before some folks would rather listen to other hypothesize the potential issue.

I’m not sure if it’s arrogance, feeling superior, a closed mindset, or any other mental affliction but it’s frustrating as hell. I feel like I’m banging my head against the wall around here at times

Right on ^^^^^^ !!!!

To the OP:
It’s a common and well known issue - it even exists if the exhaust was not ungraded… It is SO common that even Ford released a TSB on it (which I had posted early on):
TSB for Active Exhaust 22-2153:
https://www.mustang6g.com/forums/threads/ford-tsb-22-2153-active-exhaust-“drive-mode-not-available”-or-“active-exhaust-not-available”.176355/

and the reason there is a problem is because it has been found that the AE harness length in some cases is too short, which causes the chafing, the connector pin issues, and even wire breakage/shorting.

The exhaust always moves with engine torque/load and also moves all over when the car is in motion. This movement pushes/pulls/tweaks the harnesses.

I had also posted this thread in the DIY section on here a while ago to help with the chafing:
How to prevent the AE harness from chafing:
https://www.mustang6g.com/forums/threads/prevent-ae-active-exhaust-harness-chafing-damages.175530/

It doesn’t just “fix itself”. LOL….

 

[greasy]

Right on ^^^^^^ !!!!

To the OP:
It’s a common and well known issue - it even exists if the exhaust was not ungraded… It is SO common that even Ford released a TSB on it (which I had posted early on):
TSB for Active Exhaust 22-2153:
https://www.mustang6g.com/forums/threads/ford-tsb-22-2153-active-exhaust-“drive-mode-not-available”-or-“active-exhaust-not-available”.176355/

and the reason there is a problem is because it has been found that the AE harness length in some cases is too short, which causes the chafing, the connector pin issues, and even wire breakage/shorting.

The exhaust always moves with engine torque/load and also moves all over when the car is in motion. This movement pushes/pulls/tweaks the harnesses.

I had also posted this thread in the DIY section on here a while ago to help with the chafing:
How to prevent the AE harness from chafing:
https://www.mustang6g.com/forums/threads/prevent-ae-active-exhaust-harness-chafing-damages.175530/

It doesn’t just “fix itself”. LOL….

Yes! Your thread and video are what I looked into when I had the issue. Not sure why we need to reinvent the wheel here. Thanks for the help on this issue.

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