PULSATING ELECTRONIC HUM Coming from the Rear of My 392

wayoflife

wayoflife

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Staff member
There's a strange pulsating sound, kind of like a humming coming from the rear passenger side wheel well of my Jeep Wrangler Rubicon 392 and I have absolutely no idea what it is. If I could guess, it's coming from about where the EVAP is located and I should note, there is a smell of fuel in the area as well. If it matters, it's been going on for what I think might be about half an hour and if it matters, it's also been stupid hot today, maybe like 115-120 degrees. Check it out...


Any ideas what it might be? 🤪
 
Fuel pump stuck in the "On" position?

Disconnect the batteries and hard boot it.


Does the 392 recirculate gas to cool the pump?
 
kevman65 said:
Fuel pump stuck in the "On" position?

Disconnect the batteries and hard boot it.


Does the 392 recirculate gas to cool the pump?
Click to expand...
The pulsating hum has stopped but while it was on, I didn't get the impression it was coming from the sending unit. It was coming more from the passenger side rear tail light area.
 
wayoflife said:
There's a strange pulsating sound, kind of like a humming coming from the rear passenger side wheel well of my Jeep Wrangler Rubicon 392 and I have absolutely no idea what it is. If I could guess, it's coming from about where the EVAP is located and I should note, there is a smell of fuel in the area as well. If it matters, it's been going on for what I think might be about half an hour and if it matters, it's also been stupid hot today, maybe like 115-120 degrees. Check it out...


Any ideas what it might be? 🤪
Click to expand...
perfect, I'm in SLC right now, I can swing by, pick it up and drive it around for a bit to troubleshoot it.

I should get back this way around Thanksgiving.
 
wayoflife said:
The pulsating hum has stopped but while it was on, I didn't get the impression it was coming from the sending unit. It was coming more from the passenger side rear tail light area.
Click to expand...
I am thinking it may be an adult toy that someone has added to the back of your jeep, just like people like to duck jeeps.
 
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