2020 Raptor low speed grinding

[cmcpolo]

New owner of a used 2020 Raptor. It is gold certified so I do have a warranty but wanted to get some opinions before I visit the dealer on Tuesday.

First heard a grinding noise a few days after I took delivery. Happened at low speeds not long after I left my driveway but also heard it at low speeds after a 50 mile trip. Noise stops when putting truck in 4A mode. I did hear a faint grinding yesterday after putting it in 4A so I switched back to 2H and back to 4A and the noise went away. Based on everything I have read on this forum, it sounds like a textbook IWE issue.

I checked under the hood and I have the new blue tipped check value already. Someone on this forum mentioned that with a bad check valve, air should pass through in both directions. I unhooked the check valve and when I pulled the solenoid side off, I heard a whoosh of air. So, the valve appears to be maintaining a vacuum. Is it possible that this newer value is bad even though it appears to holding a vacuum? Truck had sat for a couple when I unhooked the check valve and heard the whoosh of air.

I was going to replace the check valve tomorrow and drive around before I go to the dealer on Tuesday. But, I wanted to see if anyone had any experience with the blue check valves going bad and any thoughts on the air whoosh I heard.

Thanks.

 

[JohnyPython]

 

[smurfslayer]

Welcome to FRF. Pictures, or it’s a prius.

The check valve is the most common and easy to replace part of the IWE system, but it’s not the only part that can fail. Any of the vacuum hoses could fail or parts further down the circuit. Also, if the failure has been there long enough it’s possible to damage the IWE’s themselves ( I am not correctly referring to the part name here ), but if they’re allowed to partially engage for a long enough time it will damage the internal parts at the wheel(s).

Go ahead with the solenoid change, retest and post results with your Raptor picture(s).
Hopefully, it’s just a simple failed solenoid. If not, rock 4a until you get it fixed.

 

[RogueClimber]

FYI, a first post without introducing yourself and asking for help leads you onto the wrong path

Additionally as you have not introduced yourself and shown us pictures of your truck we assume you are just another prius driving Raptor owner wanna be

 

[smurfslayer]

@RogueClimber is bucking for president of the FRF welcoming committee.

 

[cmcpolo]

Thanks for the responses and apologies for not following protocol. I'll post an introduction.

 

[RogueClimber]

@RogueClimber is bucking for president of the FRF welcoming committee.

I'm just trying to embrace my inner Ted Lasso

 

[CarlosnVegas]

Common for the hoses to crack, tear, pinhole or come off. Twice on my Gen 1 from off-roading and engine work. Cheap fix. Have your mechanic smoke the lines. Viola. $5. Hardly ever any other part. Dead give away is when you engage 4wheel drive, noise goes away.

 

[mprice1234]

No follow up from OP on fix?