Vent and a/c air smells like a$$ - 2003-04 Mach 1 Registry Owners Club

laffstang · 08-02-2020, 12:29 PM

I spent a lot of time wondering if I should ask this question, but here goes: Has anyone experienced their a/c or vent air smelling like crap- literally? Ever since I got the Mach out of storage this spring, every time I turn the fan on, it smells like I'm driving by a cattle farm. It doesn't matter if it's vent, a/c or max a/c. Does anyone have a clue as to what it might be?

bristol16 · 08-02-2020, 01:22 PM

Quote:

Originally Posted by laffstang

I spent a lot of time wondering if I should ask this question, but here goes: Has anyone experienced their a/c or vent air smelling like crap- literally? Ever since I got the Mach out of storage this spring, every time I turn the fan on, it smells like I'm driving by a cattle farm. It doesn't matter if it's vent, a/c or max a/c. Does anyone have a clue as to what it might be?

sounds like maybe something nested and/or died in the HVAC system? i'd say replace the cabin air filter but i'm pretty sure the mustangs didn't have one until 2005. you can drop the blower motor out of the box and check for any foreign weirdness up in there as well...it's held in with a few screws above the front passengers feet (there are videos on youtube for a quick guide if you are unfamiliar). fresh air is pulled through the wiper cowl, but the max a/c setting should put the hvac system into recirculate mode so if you are still experiencing the smell it may not be the source. i would recommend setting the hvac for recirc (or max a/c) before shutting it off to store it for the winter to keep anything from getting in through the fresh air blend door in the future.

laffstang · 08-02-2020, 03:33 PM

Thanks for the advice. I'll check out the blower motor. I couldn't find any info for a cabin filter for 2004.

falcongtho3 · 08-02-2020, 08:20 PM

Quote:

Originally Posted by laffstang

Thanks for the advice. I'll check out the blower motor. I couldn't find any info for a cabin filter for 2004.

No cabin air filter on our cars. Started in 2005.

311-420 · 08-02-2020, 10:12 PM

A cat pooped on the windshield cowl of my honda when I was at work a couple years ago. As soon as the air started coming over the hood, it was unbearable. I made it to about the first gas station and pulled over and found it. I'd check down in those slots in the cowl and everywhere under the hood for evidence of rodents. Since you stored the car, there's a good chance that's what it is.

67bigblock · 08-08-2020, 09:21 PM

Mouse

Stormin Norman · 08-02-2020, 04:50 PM

Quote:

Originally Posted by laffstang

I spent a lot of time wondering if I should ask this question, but here goes: Has anyone experienced their a/c or vent air smelling like crap- literally? Ever since I got the Mach out of storage this spring, every time I turn the fan on, it smells like I'm driving by a cattle farm. It doesn't matter if it's vent, a/c or max a/c. Does anyone have a clue as to what it might be?

RATS!!!!!! Look for droppings in the engine compartment and the a/c intake plenum in the cowl area. Been there done that!

08-02-2020, 12:29 PM	#1
laffstang Registered User Join Date: Jun 2004 Location: Forest City, Ia Posts: 127	Vent and a/c air smells like a$$ I spent a lot of time wondering if I should ask this question, but here goes: Has anyone experienced their a/c or vent air smelling like crap- literally? Ever since I got the Mach out of storage this spring, every time I turn the fan on, it smells like I'm driving by a cattle farm. It doesn't matter if it's vent, a/c or max a/c. Does anyone have a clue as to what it might be? __________________ 04 Mach 1, Azure Blue, 5-speed, K&N drop-in, Pypes off-road x & cat-back, MGW shifter, 4.10's, Bama tune, bought 12/30/07 90 LX 5.0, Bright Red, Hatch, 5-speed, Usual bolt-ons, bought new 04/15/90 85 GT, Burgandy, t-tops, traded for the '90, but not forgotten

08-02-2020, 03:33 PM	#3
laffstang Registered User Join Date: Jun 2004 Location: Forest City, Ia Posts: 127	Re: Vent and a/c air smells like a$$ Thanks for the advice. I'll check out the blower motor. I couldn't find any info for a cabin filter for 2004. __________________ 04 Mach 1, Azure Blue, 5-speed, K&N drop-in, Pypes off-road x & cat-back, MGW shifter, 4.10's, Bama tune, bought 12/30/07 90 LX 5.0, Bright Red, Hatch, 5-speed, Usual bolt-ons, bought new 04/15/90 85 GT, Burgandy, t-tops, traded for the '90, but not forgotten

08-02-2020, 10:12 PM	#5
311-420 Can't be bridled Join Date: Sep 2007 Location: Texas Posts: 7,006	Re: Vent and a/c air smells like a$$ A cat pooped on the windshield cowl of my honda when I was at work a couple years ago. As soon as the air started coming over the hood, it was unbearable. I made it to about the first gas station and pulled over and found it. I'd check down in those slots in the cowl and everywhere under the hood for evidence of rodents. Since you stored the car, there's a good chance that's what it is. __________________ 2004 Mach 1 #6956 5spd w/IUP Eaton swap, longtubes, built 3.73 SRA 452hp/409tq dynojet🏁

08-08-2020, 09:21 PM	#6
67bigblock Registered User Join Date: Oct 2007 Location: Northeast Posts: 163	Re: Vent and a/c air smells like a$$ Mouse __________________ 00 R 03 Mach1 DSG 04 Mach1 Red 04 F250 Harley Edition Orange/Black 04 F350 Harley Edition Black/Black

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