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Late 2015 Edge Sport tapping


ktp1598

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I have a strange issue with the Edge. There's a tapping sound coming from behind the firewall in the drivers area. It's loudest in the car with the doors closed and the air off at idle but frequency increases with engine RPM. It sounds like something is rubbing, or bouncing off of the firewall. Goes away completely above 2000 RPM. A little research pointed to a fuel rail damper (mechanical, not foam). I felt the fuel rail and it was tapping pretty hard so I took it to the dealer and he said it was a piece of foam that wasn't there. After a day or so we got the car back quiet as new but after 30 miles the sound is coming back again. Anyone else have this issue? My wife HATES odd noises and vibrations and this can get pretty loud if it comes back like it did before. Thanks!

* Built on 11/12/2015

Edited by ktp1598
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Maybe the fuel pump itself/FDM (fuel delivery module) is faulty if dampening the fuel rail isn't enough to quite the pulses. have them check the pump and all electrical connections as well. Assuming the pulse is traveling from the low pressure fuel pump to the rail (more the usual case) and not from the high pressure fuel pump back to the rail.

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I wonder if the tapping noise that you are referring to is the direct injection high pressure fuel pump.

Ā 

Most Direct Injection engines have a loud tapping sound, almost sounds like a diesel engine.

Ā 

I would fill it up with premium fuel (93) and see if at least the tapping sound isn't quite so loud.

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It's a fairly simple repair. A good mechanic can replace the pump and line in a couple of hours. The pump showed on the receipt to be only a bit over $180 so a repair out of warranty later on won't be too bad. Still quiet over 400 miles later!

Edited by ktp1598
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  • 3 months later...

I stopped the ticking. If you grab the high pressure fuel line and the plastic line directly underneath it and pull the close to each other the tapping stops. You can feel the tapping in the high pressure line and it goes away when the 2 lines are squeezed together. I think there might have been a missing clip somewhere. I put a zip tie around the 2 lines and brought them about an inch closer and the noise stopped. Made sure to put the tie around the protective sheath and not the lines themselves. I didn't have to make it tight to stop the noise. I'm sure it just moved them off of something below.

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Good you found it :thumbsup: They use a lot of noise dampeners nowadays, so there could actually be a foam block missing somewhere from the last time they tried to fix. On the 3.5EB, there is a a foam/rubber block underneath the intake manifold, might be something similar on the 2.7EB.

Ā 

If you could post detailed pics of the engine bay (sans appearance cover), we could compare with other Sport owners to see what might be visually indicated. TIA.

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  • 2 weeks later...

I'll post a few pics by this weekend. The area I zip tied was actually behind the engine, not far from the firewall.

When you have a chance id like to see those pics as well as I went to the dealer with this information and they have still yet to fix the noise. You could also email them over to me if possible, gigi121009@gmail.com

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