MotorcraftYG429 Vacuum Control Valve

Factory parts fit best

Worked to fix one of two issues with my iwe on my Ford f 150. Also used to add vacuum switch control to rear canopy light when truck is running.

Replaced the original control valve and works as described. If you are shopping for these, you are probably searching for the 'end all' to a sound you are hearing from the front end. This is to help fix the suction issues of the front wheel hubs for 4 wheel drive if the ($35) Ford solenoid is working fine. Now, with that said, if you replace both as I did, and the sound still persist intermittently. It may NOT be the 4 wheel drive suction...Let me explain. The bottom of the truck is like a tuning fork. At the right RPMs, it can cause a rattle for just seconds at a time due to possible loose skid plates and heat plates. I heard the sound from accelerating from a stop sign, or slowly driving uphill, especially pulling a trailer. The sound of a quick rattle or growl. The sound was near the front end, at the cross pipe of the exhaust running parallel to front bumper. There is a heat plate connected on top of the pipe. It is welded on one side, and a hose clamp is used on the other side of a foot long plate to attach it to the pipe. The hose clamp was missing...rusted off. That was it! I put a new hose clamp around the exhaust pipes heat plate and tightened down the other end. Whisper quiet accelerations from stop and driving uphill now. Still, if the vehicle's issue is a suction problem, this important $10 part is the answer to many! There is a tiny nickel piece inside that could get stuck in the open or close position over the years that causes the hubs to partially engage if not working properly. Good luck!

I changed this and the wheel actuators, 4 wheel drive functions fine.

2013 F-150 3.5L Ecoboost. This resolved my symptom of hearing the 4x4 grind as it was engaging when it wasn't supposed to be. As the temps started to drop this fall I could hear the IWE module on the driver side want to engage while driving at about 20-30 mph and suddenly letting off the gas. Would make sense as that is when the vacuum pressure would be at its lowest. Had taken our pickup to the dealer many times prior to this when it still had warranty. They replaced (yes this really happened): transfer case, both IWE modules, all of the front right hanger bearings for the drive shaft (the tech messed them up when sliding the shaft back in after replacing the IWE). Problem would still come back when it turned cold. I would suggest keeping a spare in the glove box as these are very inexpensive compared to replacing the IWE modules that get ground up. All they consist of is a nickel sized rubber diaphragm that losses it's flexibility over time. Combine that with cold temps and dirt contamination and you have issues.