About a week ago, the raptor started making an odd noise. It sounded almost like dragging the exhaust, but the noise started on the left side of the truck and seemed to move to the right. It would stop if I took my foot off the gas, but would last much longer if going a constant speed. Speed did not matter. It would do this at 30 mph, or 80 mph. I took it into the shop and they gave me a loaner since they could not figure it out for sure (just until Monday when the 4x4 specialist came in). I have it back and the problem seems to be resolved, but it makes no sense to me what it was. The service rep was a new kid and could not explain anything. So here it is: "Verify concern. Perform 4x4 Diag 0.5 hr. Retrieved CODE C1979:13. Perform PPPT C 0.3 hr. Used 1.0 hr MTIME to replace the IWE Solenoid and one check valve." All the service kid said was the vacuum issue was trying to engage 4x4. To complicate it more, the two parts used are 1 - 7LIZ*9H465*B Valve Assemble and 1 - XR3Z*19A563*AA Valve - Air Conditioner. So how was my air condition linked to my 4x4 trying to engage every couple minutes? Does anyone understand this one? Thanks
makes sense. I'm no Ford Tech, but if you read the threads over in FRF1 you'll see the genesis of the IWE saga. Vacuum operates the actuators and also part of the climate control system. Go search the threads over ther for a more educated answer.
Thank you. I looked for Gen 2 and did not think about opening that up to Gen 1. There is a lot of information there.
Had the same issue happen with my truck, twice now. The first time it was the seal ring around the actuator, which had cracked, making the vacuum line not function properly. The second time it was the actual vacuum line, itself, that went bad and got replaced, with no visible damage to the actuators or seal ring. I posted a video about it on this site a while back.
