Intake Runner Stuck Closed

[Paris MkVI]

It is more than a little absurd that, given this has been an issue with Ford V8 intake manifolds going back to the 1990's, that Ford never fixed this once and for all a long time ago.

I waited four and half months for my replacement back in 2020, courtesy of co-vid and all the supply chain nightmares.

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[K4fxd]

OK, you have a GT350 intake manifold already. I've never heard about one of these breaking the actuator. Anything is possible. The problem is most likely the wiring. Need to log IMRC and see if you are getting a signal.

Either way that manifold needs to come off to diagnose and fix.

 

[K4fxd]

Looks like you have the stock TB. It may or may not be tuned. Have you hit the rev limiter? If so what was the RPM?

 

[reju212]

OK, you have a GT350 intake manifold already. I've never heard about one of these breaking the actuator. Anything is possible. The problem is most likely the wiring. Need to log IMRC and see if you are getting a signal.

Either way that manifold needs to come off to diagnose and fix.

Said gt350, then stock. Which one?

 

[K4fxd]

GT350 Intake manifold Stock Throttle body

 

[K4fxd]

Looking at your photos a bit closer your vacuum hoses are not properly installed. Too bad you are not closer.

It looks like it is pulling vacuum where the IMRC needs fresh air. The hose on the passenger side top of the intake manifold is supposed to go to the CAI. It is hooked to the aspirator. Without actually having the car to look at I can only use an educated guess that it is not correct. It definitely does not need 2 aspirators.

Find a mustang performance shop and let them look at it. It may be an easy fix.

Another piece of the puzzle that leads me to believe it is hooked to vacuum is normally the IMRC will stick open due to a spring opening them and vacuum closing them.

 

[reju212]

Looking at your photos a bit closer your vacuum hoses are not properly installed. Too bad you are not closer.

It looks like it is pulling vacuum where the IMRC needs fresh air. The hose on the passenger side top of the intake manifold is supposed to go to the CAI. It is hooked to the aspirator. Without actually having the car to look at I can only use an educated guess that it is not correct. It definitely does not need 2 aspirators.

Find a mustang performance shop and let them look at it. It may be an easy fix.

Another piece of the puzzle that leads me to believe it is hooked to vacuum is normally the IMRC will stick open due to a spring opening them and vacuum closing them.

I don’t have a diagram, and there are no performance shops per se here. The intake manifold and JLT intake seem to have an excessive amount of hoses.

 

[K4fxd]

You need one for the brake booster. Should be on the drivers side of the intake manifold. You need one for PCV. This is on the passenger side of the manifold. You need one hose from the drivers side of the CAI to the driver side valve cover, looks like another PCV valve. You need one to the EVAP valve the thing in the center on top of the Manifold. Has a wire plugged in also. Then you need the fresh air for the IMRC, that is the top hose on the manifold and goes to the passenger side of the CAI, small nipple. I'll see if I have a pic as I have a truck manifold on mine right now.

Any mechanic should be able to hook up the hoses correctly with my directions here. Neither aspirator is needed

 

[reju212]

You need one for the brake booster. Should be on the drivers side of the intake manifold. You need one for PCV. This is on the passenger side of the manifold. You need one hose from the drivers side of the CAI to the driver side valve cover, looks like another PCV valve. You need one to the EVAP valve the thing in the center on top of the Manifold. Has a wire plugged in also. Then you need the fresh air for the IMRC, that is the top hose on the manifold and goes to the passenger side of the CAI, small nipple. I'll see if I have a pic as I have a truck manifold on mine right now.

Any mechanic should be able to hook up the hoses correctly with my directions here. Neither aspirator is needed

Do we happen to have a picture of what it’s supposed to be?
Also, would a lockout fix all of this?

 

[Snakebyte]

You need one for the brake booster. Should be on the drivers side of the intake manifold. You need one for PCV. This is on the passenger side of the manifold. You need one hose from the drivers side of the CAI to the driver side valve cover, looks like another PCV valve. You need one to the EVAP valve the thing in the center on top of the Manifold. Has a wire plugged in also. Then you need the fresh air for the IMRC, that is the top hose on the manifold and goes to the passenger side of the CAI, small nipple. I'll see if I have a pic as I have a truck manifold on mine right now.

Any mechanic should be able to hook up the hoses correctly with my directions here. Neither aspirator is needed

I enjoy watching you as you help this guy out as much as possible remotely. What a great forum and folks like you making it a success.

 

[SheepDog]

Refer to the MACH1 sections for the 350 intake manifold.

 

[SheepDog]

 

[K4fxd]

Here is what it should look like

 

[Lucky13Cat]

18 up manifold requires a tune and if you use another 17 manifold this will break again. The 350 manifold uses steel rods so doesn't break.

Uuuuuuhhh pretty sure my ‘23 Mach 1 has a GT350 manifold and it’s broke at 12,000 miles

 

[WildHorse]

Check the fuse/electrical connections ? IF the CVVT was broken it'd show out of range codes.

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