IWE check valve control box

[Mister Pinky]

In my experience, Ford employs the system for the benefit of the consumer; it saves on fuel (but not enough to change EPA ratings) and wear on the front axles, differential, propshaft, and transfer case, which typically becomes known well after 150,000 miles (out of warranty).

I, for one, appreciate the system. No point in turning driveline components that aren't being used; it's a parasitic loss and causes wear and tear on components that aren't even being actively used.

The system is one of the most basic and simplest to diagnose; it's just vacuum principles. The most common complaints come from those who bring their truck to an incompetent dealer that doesn't understand the system. It's unfortunate, because it's actually a system intended to benefit the owner in the long term.

Interesting. Never thought about it like that. Beyond the 4WD system, are there any other major systems still controlled by vacuum such as HVAC actuators or the like?

 

[FordTechOne]

Interesting. Never thought about it like that. Beyond the 4WD system, are there any other major systems still controlled by vacuum such as HVAC actuators or the like?

Not that I can think of; the IWEs are really one of the last vacuum operated systems. All HVAC actuators have been electrical for a number of years; even the turbocharger wastegates on Gen 2 3.5 are operated by electric motors.

 

[Oscar_14]

In my experience, Ford employs the system for the benefit of the consumer; it saves on fuel (but not enough to change EPA ratings) and wear on the front axles, differential, propshaft, and transfer case, which typically becomes known well after 150,000 miles (out of warranty).

I, for one, appreciate the system. No point in turning driveline components that aren't being used; it's a parasitic loss and causes wear and tear on components that aren't even being actively used.

The system is one of the most basic and simplest to diagnose; it's just vacuum principles. The most common complaints come from those who bring their truck to an incompetent dealer that doesn't understand the system. It's unfortunate, because it's actually a system intended to benefit the owner in the long term.

Thank you for the help. I think the problem has been resolved. We found a similar plastic check valve wtih the membrane inside from another car and replaced it. And the noise is gone now. So there probably was an air leak going both ways inside of the check valve.

I would like to ask one more thing. In winter, when it's really cold and frosty, the door locks won't shut. Maybe you have any recommendation regarding that issue? Thank you.

 

[FordTechOne]

Thank you for the help. I think the problem has been resolved. We found a similar plastic check valve wtih the membrane inside from another car and replaced it. And the noise is gone now. So there probably was an air leak going both ways inside of the check valve.

I would like to ask one more thing. In winter, when it's really cold and frosty, the door locks won't shut. Maybe you have any recommendation regarding that issue? Thank you.

Glad to hear it’s fixed! As far as the doors, it sounds like the latches are freezing. There was a service campaign for F-150s in North America for that concern, Ford covers the cost. Since you don’t have any Ford dealers in your country, I can DM you the service procedure if you’d like.

 

[Oscar_14]

Glad to hear it’s fixed! As far as the doors, it sounds like the latches are freezing. There was a service campaign for F-150s in North America for that concern, Ford covers the cost. Since you don’t have any Ford dealers in your country, I can DM you the service procedure if you’d like.

That would be great. Thank you.

There are not that many Ford Raptors around here, people here are more into japanese and european cars. Therefore even finding the necessary parts is a tough job. We usually just order them from the US. And local mechanics don't have that much experience in fixing this type of vehicles. Thank you for your help.

 

[FordTechOne]

That would be great. Thank you.

There are not that many Ford Raptors around here, people here are more into japanese and european cars. Therefore even finding the necessary parts is a tough job. We usually just order them from the US. And local mechanics don't have that much experience in fixing this type of vehicles. Thank you for your help.

No prob. Just DM me your VIN so I can send you the corresponding bulletin.