2018 Active Exhaust Install Guide

[MH702]

Both mine were off, I had to turn them both on in my car.

Yeah my question is about the Idle Switch did you enable it ?and what does this do if it was enabled?

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[derwin252]

Yeah my question is about the Idle Switch did you enable it ?and what does this do if it was enabled?

Good question, unfortunately I did not turn the idle switch on. Maybe someone knows. I did try to find the importance of turning it on but found nothing. I do plan to turn it on since it seems like it’s on from factory.

 

[MH702]

Please update if there is any noticeable change once you enable the ideal switch

I ordered everything to install my AE mufflers , actuators and required harnesses and want to make sure I have everything to be done at once

 

[derwin252]

Please update if there is any noticeable change once you enable the ideal switch

I ordered everything to install my AE mufflers , actuators and required harnesses and want to make sure I have everything to be done at once

Found this don’t know why I could find an answer before.

 

[MH702]

it seems that won’t effect the AE functionality by any means

it make sense to me now

Thanks derwin for your help

 

[mustang1000]

I have both the Y harnesses one for a 2018-2019 and one for 2021 - 2023 Pm me if interested.

 

[bigislej]

Hey All! I just want to thank everyone that chimed in with information on this topic. Using everything I learned here, I was able to buy the right parts (used mufflers with actuators and wiring harness), equipment (ForScan and communicator, HP Tuners MPVI3 and VCM Edit + credits) and enable Active Exhaust on my car. Super stoked I learned all of this and looking forward to more mods in the future!

 

[DM_BK]

Hey All! I just want to thank everyone that chimed in with information on this topic. Using everything I learned here, I was able to buy the right parts (used mufflers with actuators and wiring harness), equipment (ForScan and communicator, HP Tuners MPVI3 and VCM Edit + credits) and enable Active Exhaust on my car. Super stoked I learned all of this and looking forward to more mods in the future!

Now you need to write a step by step guide. It is mandatory and shouls become a "sticky".

 

[Bullitt_s550]

I have a 2021 without ae and plug in the trunk is 8 wire but with the 12 wire connector so in theory I would use the gt500 harness posted above yeah? Any idea what the 4 wires missing would be its gray, gray with yellow, violet with green , and yellow with green missing assuming those go to the diff cooler i dont have id just need the one harness and 2 jumpers posted yeah?

 

[Bullitt_s550]

updated ipc config now have the screen for exhaust and can change modes but dont get the fault i did check hptuners (i have a cable but dont have the credits yet)and active exhaust is checked off assuming thats why im not getting the fault without anything hooked up supposed to be grabbing ae mufflers and valves this weekend then will get harnesses and tune ordered

 

[MH702]

updated ipc config now have the screen for exhaust and can change modes but dont get the fault i did check hptuners (i have a cable but dont have the credits yet)and active exhaust is checked off assuming thats why im not getting the fault without anything hooked up supposed to be grabbing ae mufflers and valves this weekend then will get harnesses and tune ordered

You will not get the fault without making the Active exhaust 1&2 enabled.

 

[mustang1000]

I have a extra set of actuator jumpers if any one is interested please pm me

 

[Bullitt_s550]

You will not get the fault without making the Active exhaust 1&2 enabled.

Thats what I had assumed driving 4 hours round-trip this weekend so wanted to make sure I could get the forscan side done before buying

 

[fonatig]

After going through the entire thread, I couldn’t find a single post where someone managed to get the active exhaust working through the dashboard without initially having the fuse and relay in the fuse box.

Has anyone actually been able to do this?

I happen to be one of the “lucky ones” - my 2018 Ecoboost Mustang Premium with Digital Dash has neither the relay nor the fuse. On top of that, most of the wiring required for the system to function is missing from the car.

However, for some reason, there is a section of wiring running from under the spare tire area (C3806) to both the driver’s (C264) and passenger’s (C215) footwell.

I’ve marked in green the part of the wiring that came from the factory and purple what I managed to add (Y-harness and 2 actuator jump-wires).
My plan is to add the missing wires and pins so everything looks and works as close to factory-standard as possible.

So far I ordered proper Fuse Junction Box and going to source components from it.


If anyone has advice, tips, or experience with this, I’d really appreciate it!

 

[andy9111]

I'm helping a friend install active exhaust. He has everything connected and ready. I did the forscan. He has the relay and the fuse. He is only missing the tune. My question is since active exhaust is a stock feature would I be able to flash a calibration file from a vehicle with active exhaust using forscan beta? (I'm here to learn)

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