ThugFordEdge3.5 Posted September 20, 2019 Report Share Posted September 20, 2019 I don't know if this is normal or if this noise has always been there, but today I noticed when I get in my 2017 Ford Edge and I first press the brake before pushing ignition button, I hear a noise in the back that sounds like something disingaging or engaging. It sounds almost exactly the same as when the emergency brake get disengaged. After I press brake when vehicle off and noise happens I can't repeat it and get the noise to happen again unless I start vehicle and turn it off again. Then when i press brake before hitting the ignition button I hear this noise again right before I start vehicle. Does anyone hear this also and knows what it is? Quote Link to comment Share on other sites More sharing options...
omar302 Posted September 20, 2019 Report Share Posted September 20, 2019 (edited) I'd say it is most probably the fuel pump prime sound. In other words, the fuel pump is starting and pressurising fuel to get ready for the engine to start. Edited September 20, 2019 by omar302 1 Quote Link to comment Share on other sites More sharing options...
ThugFordEdge3.5 Posted September 20, 2019 Author Report Share Posted September 20, 2019 25 minutes ago, omar302 said: I'd say it is most probably the fuel pump prime sound. In other words, the fuel pump is starting and pressurising fuel to get ready for the engine to start. I actually thought that also. I had my vehicle at ford dealer today getting straps on the gas tank to stop sloshing gas in tank. When I went to start my edge it stalled quickly after pressing ignition, but I think I pressed brake and quickly after hit ignition button. So maybe the fuel didn't have time to prime itself and after they played with the tank it may of left air spots. I'm not sure, but for some reason I only noticed that sound today after they did that TSB strap assembly on the gas tank. I do have a hissing sound near gas tank for last 2 months and I think it's my fuel pump, but each time i tell ford about it they tell me they can't hear it. I'm assuming there in the vehicle and aren't stepping out to hear it. I'm gonna be buying a fuel pump and paying to have it installed. I'm under warranty but pretty much done with my local ford dealer lol. They have 4 mechanics and all under 25 years old looking. Every time I go there I have other problems. Quote Link to comment Share on other sites More sharing options...
ThugFordEdge3.5 Posted September 20, 2019 Author Report Share Posted September 20, 2019 (edited) I looked everywhere online and the only thing I find on fuel pump being primed is when vehicle door opens that when it primes some fuel pumps or when ignition is turned. The only other thing I can think of is brake fluid being pumped into brakes for a safety thing, encase engine shuts off and you need brakes. it's vacuum air being pumped in so brakes work maybe? Although I'm not sure because I can't find anywhere that someone has that question or issue being asked about strange noise in the rear when pressing brake with engine off. It sounds like the emergency brake releasing but the problem is that this noise happens with my emergency brake already activated. Edited September 20, 2019 by ThugFordEdge3.5 Quote Link to comment Share on other sites More sharing options...
omar302 Posted September 20, 2019 Report Share Posted September 20, 2019 I know there is a ForScan edit that can enable Fuel Prime with door ajar, so maybe not all Fords are set up to prime with the door. I remember my old MKX's Fuel Pump primed with the brake. Don't really remember with my 2016 Edge. I'll try to remember to check next time. 1 Quote Link to comment Share on other sites More sharing options...
ThugFordEdge3.5 Posted September 20, 2019 Author Report Share Posted September 20, 2019 4 hours ago, omar302 said: I know there is a ForScan edit that can enable Fuel Prime with door ajar, so maybe not all Fords are set up to prime with the door. I remember my old MKX's Fuel Pump primed with the brake. Don't really remember with my 2016 Edge. I'll try to remember to check next time. Thank you. That would be great. Quote Link to comment Share on other sites More sharing options...
omar302 Posted October 5, 2019 Report Share Posted October 5, 2019 (edited) On 9/20/2019 at 4:53 PM, ThugFordEdge3.5 said: Thank you. That would be great. Sorry for the late answer answer, but kept forgetting to check for the noise when going out. The problem is that I remote start my car like 95% of the time. Anyway, today I checked. After unlocking the door from a distance I opened the door and no noise. Pressing the brake pedal braught up the noise. Though it is less obvious then the parking brake. And on another drive I did not hear it. So it seems it is not consistent. Or my hearing is weakening ?. Edit: Found SSM 48007 (attached) about a similar noise from the rear that as per Ford is from the RDU, but it is for the 2019 Edge/Nautilus. The 2019 models use a different AWD system than the 2015-2018 models, but as per this parts listing the RDU is the same for all 2015-2019 models. So maybe you have a similar issue as described. MC-10160946-0001.pdf Edited October 5, 2019 by omar302 2 Quote Link to comment Share on other sites More sharing options...
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