My A/C compressor goes Hurhrummmmpphhh

[Dereck]

Hi Guys

My A/C compressor goes hurhrummmmpphhh when I first start the car after it has sat overnight, for the rest of the day it is fine and the A/C blows 38 degrees, any ideas on the problem?

Regards

Dereck

[Bluerauder]

Hi Guys

My A/C compressor goes hurhrummmmpphhh when I first start the car after it has sat overnight, for the rest of the day it is fine and the A/C blows 38 degrees, any ideas on the problem?

Regards

Dereck
I think the sound that you are hearing is the compressor for the air suspension. Mine kicks on in the morning on the first start. Fix your eyes on a stationary point while looking in the rear view mirror and you can watch the rear end of the car lift. When the "hurhrummmmmpphhh" noise stops, you won't see it lifting anymore. :D This is normal --- no problem.

[fastblackmerc]

What he said.....

[Dereck]

Hi Guys

Nope it's definately the A/C compressor it makes an hurhrummmmpphhh noise a couple seconds after the engine starts, my air ride compressor makes a rumbling noise for 10 or 15 seconds while it pumps up the rear.

Regards

Dereck

[TooManyFords]

We need video, with audio. :D

[SC Cheesehead]

We need video, with audio. :D

http://www.youtube.com/watch?v=JN99jshaQbY

[ImpalaSlayer]

http://www.youtube.com/watch?v=JN99jshaQbY


:rofl: :drink:

[Vostok]

http://www.youtube.com/watch?v=JN99jshaQbY

LOL :bigcry::bigcry:

[Black_Out]

http://www.youtube.com/watch?v=JN99jshaQbY

that made me :D lol

[cruzer]

Dereck, I'm taking my '03 in Wednesday for warranty work for the same problem--if you can wait, I'll have the fix by Thursday--will post as soon as I get it. Maury

[Dereck]

Hi Guys

I posted this question to see if anyone knew the answer to the problem, obviously after 140 views and a moronic video link no one does.

Here is the requested (not overly clear as it's really difficult to film the A/C compressor, more light is needed I think) video, you can hear the compressor click in then half a second later hear a farting noise and see the belt tensioner twitch under the load.


4OWZNSZdnXg



Cruzer: I think the problem is caused by oil draining back into the compressor and believed I could fix the problem by fitting a relay so that the compressor engaged while cranking, this (It thought) would clear the oil from the compressor and stop the harumph noise, but I notice in the video the compressor does actually turn while cranking, then stop, then re-start a couple seconds later, I wonder if I used a timer and relay to keep the compressor engaged for a few seconds even after the key was released whether this would cure the problem.


I await the response from your dealer with eager anticipation.


Regards


Dereck

[LeoVampire]

Sounded like a high presure release of the clutch. It has low enough pressure for it to start enguaging the clutch then the pressure climbs to high right away and releases the clutch again.

Maybe a cloged orifise tube or dryer.

[BAD FIVE O]

Hey bud I have the same issue on my 03 it started around 78000 don't know what it is yet . if i find out ill post it .:mad2:

[YOCKIT]

Have a 03 82k with same thing on startup and sometimes after stop light taking off. Makes a burp vibration sound. Not the air pump.

[wilsoj6]

I have the exact same problem but it only does it shorlty after I start the car and turn on the A/C. It usally does it once and then I don't hear it anymore. Definately something to do witht the A/C.

[TooManyFords]

Sounded like a high presure release of the clutch. It has low enough pressure for it to start engaging the clutch then the pressure climbs too high right away and releases the clutch again.

Maybe a clogged orifice tube or dryer.

Yes, I had that problem In the upper hose that goes through the firewall there is a connector. Open that connector and there is a white plastic thing that goes inside with a fine wire screen as a filter. It is supposed to trap metal particles from the compressor. I bet it is plugged. Mine was and it finally kept the A/C from working. The replacement is cheap, but you have to take it to a service center so they can vacuum the system before cracking it open.

YMMV.

[Dereck]

Hi LeoVampire


Sounded like a high presure release of the clutch. It has low enough pressure for it to start enguaging the clutch then the pressure climbs to high right away and releases the clutch again.

Maybe a clogged orifice tube or dryer.

At the moment I am not subscribing to your theory about a blocked orifice tube/drier but thank-you for the suggestion. I am not dis-missing the posibility of maybe some crud blocking it intermittantly. When I took some pressure readings I had 65 -70psi static pressure, the low side cycling between 22 - 45psi and the high side at 150 - 175 psi all normal readings

Hi TooManyFord



The replacement is cheap, but you have to take it to a service center so they can vacuum the system before cracking it open.

YMMV.

Do you mean a service center with a machine like my Robinair sitting in my workshop ;)


http://www.superstitiongold.com/lincoln/pictures5/Air%20Con%20Machine%20008.jpg


Regards

Dereck

[LeoVampire]

Cool on the readings just went by what you started off with for a description and the video. Without further info it is always hard to say what might cause the issue.

[Dereck]

Hi Guys

Anyone ever find out what causes the A/C compressor to make a "Harummph" noise on initial start up after sitting overnight? Mine is still doing it, sometimes louder than others and the A/C is still blowing ice cold air

Regards

Dereck

[fastblackmerc]

Hi Guys

Anyone ever find out what causes the A/C compressor to make a "Harummph" noise on initial start up after sitting overnight? Mine is still doing it, sometimes louder than others and the A/C is still blowing ice cold air

Regards

Dereck

:dunno: We were waiting for you to figure it out.

[Dereck]

:dunno: We were waiting for you to figure it out.

Hi Fastblackmerc

Oh! :D

I suppose first I had better get to experimenting with the refridgerant charge reducing it a couple ounces or so see if that makes a difference.

This might take a while so don't hold you breath.

Regards

Dereck

[ImpalaSlayer]

my Bronco does this if i leave the ac on and shut it off. if i dont drive it for a few days it will make a similar noise.

[Krytin]

Hi Dereck,
I think ToManyFords might be right. I've had this problem on one of my older FoMoCo products before and replacing the inline screen/filter was the fix.
Good luck,
Paul

[Dereck]

Hi Guys

I am quietly confident I have cured my A/C compressor harumph on start up :)

Monday I recovered four ounces of refrigerant from the system so I now have only thirty six ounces in there as opposed to Ford's specified forty ounces and for the last three mornings I have had no harumph on start up.

The air temperature from my center registars is still ~ 38 degrees (ambient temperature 72 degrees) and the compressor doesn't seem to be cycling any more often than before.

Have Ford altered the A/C refrigerant charge and not told me?

Regards

Dereck

[Marauderjack]

Mine says 38 ounces of refrigerant??:confused:

My dealer overcharged it once and it not only made the Harrruuummmph noise but the belt also slipped and squealed too!!:eek:

You probably have it!!:beer:

[Dereck]

Mine says 38 ounces of refrigerant??:confused:

My dealer overcharged it once and it not only made the Harrruuummmph noise but the belt also slipped and squealed too!!:eek:

You probably have it!!:beer:

Hi MarauderJack

Definately says forty ounces on my sticker under the hood

http://superstitiongold.com/lincoln/2003MercuryMarauder/Marauder%20Air%20Con%20Sticker %20002.jpg

Regards

Dereck

[Joe Walsh]

http://www.youtube.com/watch?v=JN99jshaQbY

OMG!....:rofl:
I was thinking of posting the exact same video...I almost fell out of my chair when I clicked on the link!



Hi Guys

I posted this question to see if anyone knew the answer to the problem, obviously after 140 views and a moronic video link no one does.


Yes, but you have to admit that the video link was funny....

[Horsepower]

Hi Guys

Nope it's definately the A/C compressor it makes an hurhrummmmpphhh noise a couple seconds after the engine starts, my air ride compressor makes a rumbling noise for 10 or 15 seconds while it pumps up the rear.

Regards

Dereck

I know exactly what your hearing. Trust me bro, it's only gonna get worst. Mines makes the noise everystartup. I'm taking it in for service this weekend to fix this annoying ass issue.

[Dereck]

Hi Guys

Well it's been over a week now and no A/C harumph on start up even after sitting all weekend so I reckon this one is fixed :)

Regards

Dereck

[Krytin]

Very good!

[JCMM]

Mind you I am not a techie, but I just had to add 134a this evening and was surfing through the shop mannual page 412-00-4 talks about a Compressor Anti-slugging Stragtegy (CASS). Basically, the compressor is supposed to come on for 2 seconds prior to cranking the engine. By "cranking" I guess Fomoco means no spark, since the starter is needed to spin the compressor.

The point of this pre-start is to allow liquid refrigerant to be pushed from the compressor. Liquid does not compress, and could damage the compressor. The entire system is supposed to be in a gassous state. If your system is overfilled, some liquid refrigerant might condense in the compressor and cause damage on start up.

The CASS is only supposed to happen when ignigiton is off for 8+ hours, ambient temp is above 25 deg F, and the battery is above 8.5 volts. I guess that means every morning except during Feburary.

The PCM initiates this CASS process regardless of EATC settings.

This may or may not be the source of your noise on startup.

[PeteSzerszen]

Hey gang,

I've got an '03 300B (Silver Birch) and I can tell you that from my experience, the burping noise is not a good thing. My compressor seized around 60,000 miles and $1400 later I had a new A/C system, but the darn thing started burping. I took it back to the dealer that performed the work and of course, they could not replicate it. Well, 50,000 miles later, I am staring down the barrel of another seized compressor with no help from FoMoCo. My theory is that when the compressor seized before, the techs failed to fully flush out the debris and maybe charged it to the wrong amount.

I do live in Arizona and use the A/C year-round pretty much, but this will be my third A/C "system" in 110,000 miles, completely unacceptable to me.

If anyone else has had problems with their compressors seizing, please let me know. Also, if anyone has any contacts in Dearborn where I might be able to get some assistance with the repairs, that would be fantastic.

Thanks all, and rock on!

-Pete

[PeteSzerszen]

Hi again gang,

Well another $1250 later and yet another A/C system. When these compressors go, they cause catastrophic contamination to the rest of the system, so the only "right" way to take care of it is a firewall-forward component replacement. Rather than going to the "stealership", I took her to a local independent shop who was able to complete the job in one day. I'd have done the work myself, but flushing the system is not something I am equipped to do.

Now with the new system, the air blows colder and there is no Hurhrummmmpphhh sound.

Also, did anyone have any odor associated with the sound? I did... it smelled sort of like rubber cement. Anyway, that's gone now too.

The bottom line is, these A/C systems are expensive and prone to "black death", so if in doubt, have it checked out. I know I will now be making it a habit to flush my system out every now and again and probably replace the orifice tube at the same time. The technician said he's never seen such large metal particles, and the orifice tube was soot black with metal shavings everywhere.

I wish everyone the best of luck and drive on!

-Pete

[babbage]

Can the dealer do a flush of the AC system? How much $$$ are we talking?