JeepinSC

Weird electrical/metal burning smell coming from all vents. 2012 3.6L v6 Jeep 150K miles. AC and Heat works perfect at all levels blowing. No strange sounds. Just a bad electrical type burning smell that is constant . I thought maybe I should try to replace the blower fan motor, but it seems to work fine? No leaking from underneath either... Anyone else have similar issue? Thanks in advance!!

Jay2013jk

Welcome to JKF.. A few questions: Constant as 100% of time you are operating your rig? With HVAC in OFF position? Any guesstimate on when or how long this has existed?

Creepy Neville

Heya JeepinSC -

Is the Jeep new to you ?

Any codes ?

Have you done any wiring anywhere on the jeep recently - or even just before the present season?

Of course the odor could be coming from any number of places and the fan just picking it up and sending into the cab.

First thing I would do is check the fuses - and make sure they are all appropriate for their position, then I would have a poke around under the dash for burnt and/or crunchy wires or connections.

Neville

JeepinSC

Thanks Jay. Constant as in only when it is "on". I don't smell anything when "off", or top off the jeep I would guestimate this has been going on for about 2-3 months.

JeepinSC

Thanks Neville. I've had the jeep for almost a year now, bought it at around 140K. I have not done any wiring. I'll check the wiring. Not getting any codes. Great recommendation, I'll check. thanks!!!!

thenomad

You sure it's not burnt oil smell? Mine was dripping tiny bit on pass manifold and it gets sucked in the vents at idle occasionally. I think egr valve replacement solves it

JeepinSC

Thanks Thenomad! I'll check that too. I actually replaced the blower motor to see if that might be it, it wasn't... Checked wires, no sign of burn... I'll check this next. so weird...

thenomad

Get in there and look for evidence of burt oil on the exhaust mani, top and bottom. Valve cover drip. There are cam sensors going into the cover with grommets too. I had no drips on the ground

JeepinSC

I may have found it. Removed engine cover and noticed some burning or wear to the inside insulation. Seems like a potential fire hazard. The insulation was hanging and touching the alternator, maybe heated up and cause smoke?? I removed cover and so far no more smell. Hope this hold up(no smell)


and maybe it will help someone else.

JeepinSC

Update. Smell came back. Engine locked up and died. Pentistar v6, go figure. Ugh.... New engine now. Same smell. Replaced blower and resister. Still bad smell. Now fan just stopped working. To say this is a project jeep is an understatement.