 OT: Problem with the Wife, 's AC in her SUV |
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| Grimstead |
  Jun 20 2006, 10:18 PM
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#1
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Cheaky Monkey  Group: Members Posts: 835 Joined: 20-March 05 From: Corona, Ca Member No.: 3,789 Region Association: Southern California  |
I'm betting one of you geniuses can help me out so here it is.... (IMG:style_emoticons/default/smiley_notworthy.gif)
My Wife (IMG:style_emoticons/default/wub.gif) has a 1998 Ford Explorer (IMG:style_emoticons/default/icon8.gif) with the Electronic Automatic Temperature Control (EATC) that started having problems lately. With the AC on and the car medium to hard accelerating (IMG:style_emoticons/default/driving-girl.gif) the air from the front vents switches to the top defrost vents. As soon as she releases the accelerator the air switches back. I’m assuming it is a problem with either some sensor or one of the controls vacuum lines but everything looks plugged in and operating. She also noticed around the same time, that the fan does not blow as hard & the AC isn’t as cold. (IMG:style_emoticons/default/confused24.gif) Thanks in advance, Bill (IMG:style_emoticons/default/popcorn[1].gif) |
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Replies(1 - 8)
| Aaron Cox |
Jun 20 2006, 10:24 PM
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#2
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
problem is......
its a ford (IMG:style_emoticons/default/smile.gif) sorry bill. someone else can heeelp (IMG:style_emoticons/default/smile.gif) |
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| drive-ability |
Jun 20 2006, 11:15 PM
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#3
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Senior Member Group: Members Posts: 1,169 Joined: 18-March 05 From: Orange County, California Member No.: 3,782 |
QUOTE(Grimstead @ Jun 20 2006, 09:18 PM)  I'm betting one of you geniuses can help me out so here it is.... (IMG:style_emoticons/default/smiley_notworthy.gif) My Wife (IMG:style_emoticons/default/wub.gif) has a 1998 Ford Explorer (IMG:style_emoticons/default/icon8.gif) with the Electronic Automatic Temperature Control (EATC) that started having problems lately. With the AC on and the car medium to hard accelerating (IMG:style_emoticons/default/driving-girl.gif) the air from the front vents switches to the top defrost vents. As soon as she releases the accelerator the air switches back. I’m assuming it is a problem with either some sensor or one of the controls vacuum lines but everything looks plugged in and operating. She also noticed around the same time, that the fan does not blow as hard & the AC isn’t as cold. (IMG:style_emoticons/default/confused24.gif) Thanks in advance, Bill (IMG:style_emoticons/default/popcorn[1].gif) The vent controls are powered by engine vacuum. Most all cars/trucks set up this way need a vacuum reservoir to handle extended loads where engine vacuum is concerned. In short you have a vacuum leak where the system feeds the vent controls. It is likely under the hood or in a fender well. A vacuum line off / damaged directly in line with the vent feed. The amount of vacuum needed is small, so its likely the engine still idles smooth. The leak could be under the dash but not as likely as under the hood. |
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| Grimstead |
Jun 21 2006, 09:01 AM
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#4
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Cheaky Monkey Group: Members Posts: 835 Joined: 20-March 05 From: Corona, Ca Member No.: 3,789 Region Association: Southern California |
Thanks for the advice, that makes sense. Now my next question would be how best to check for a vacuum leak?
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| SLITS |
Jun 21 2006, 10:50 AM
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#5
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
1st check the vacuum canister with ****gasp**** a vacuum pump...Avaliable at your local Flaps and many fine tool stores.
If it holds, the start checking the colorful little plastic lines that run to it with ****GASP**** a vacuum pump...Available at Sears, Harbor Freight and many other fine stores. In the end, tell her to stop having Soccer Mommy Races with the other mommies in their SUVs. Her ego will get over it. And if you didn't drink such shitty beer that kills your grey cells you would have already figured this out............ |
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| ptravnic |
Jun 21 2006, 11:22 AM
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#6
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Senior Member Group: Members Posts: 1,231 Joined: 27-May 03 From: Chicago, IL Member No.: 747 Region Association: None 
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On my 914, I check for vacuum leaks using handheld propane (camping type). Spray the stuff all around the hoses that might be cracked/leaking/etc... The engine will stumble (but not stall) if propane gets in the air/fuel mixture.
-pt |
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| maf914 |
Jun 21 2006, 11:56 AM
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#7
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Not a Guru! Group: Members Posts: 3,049 Joined: 30-April 03 From: Central Florida Member No.: 632 Region Association: None
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QUOTE(ptravnic @ Jun 21 2006, 09:22 AM) On my 914, I check for vacuum leaks using handheld propane (camping type). Spray the stuff all around the hoses that might be cracked/leaking/etc... The engine will stumble (but not stall) if propane gets in the air/fuel mixture. -pt That makes me wonder what the LEL is for propane. You know, the lower explosive limit or the the percentage mixture required for an explosion. (IMG:style_emoticons/default/ohmy.gif) (IMG:style_emoticons/default/laugh.gif) |
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| Grimstead |
Jun 21 2006, 02:09 PM
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#8
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Cheaky Monkey Group: Members Posts: 835 Joined: 20-March 05 From: Corona, Ca Member No.: 3,789 Region Association: Southern California |
QUOTE(SLITS @ Jun 21 2006, 09:50 AM) 1st check the vacuum canister with ****gasp**** a vacuum pump...Avaliable at your local Flaps and many fine tool stores. If it holds, the start checking the colorful little plastic lines that run to it with ****GASP**** a vacuum pump...Available at Sears, Harbor Freight and many other fine stores. In the end, tell her to stop having Soccer Mommy Races with the other mommies in their SUVs. Her ego will get over it. And if you didn't drink such shitty beer that kills your grey cells you would have already figured this out............ Damn, I so hate going to Harbor Freight (IMG:style_emoticons/default/happy11.gif) While I'm there do you need me to stop by the fabric store next door and pick you up some denim for another pair of those daisy dukes you love soo much? (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/whack_3.gif) |
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| Joe Ricard |
Jun 21 2006, 02:24 PM
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#9
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
I think the lower volume of air from the fan is also associated with said vacuum leak.
One of them shitty little plastic manifolds my have a crack. My dad had this problem with one of his Fords. Ended up selling it instead of fixing it. Bought a Dodge now he just shovels gas dollars at it. My teener says "What's vacuum line"? |
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