Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now

Now available from EcoModder: ScanGauge II fuel economy gauge.  Click for details.  

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-07-2012, 11:00 PM   #11 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Galveston, IN
Posts: 613

Pacifica3.5AWD - '04 Chrysler Pacifica Touring
Team Dodge
90 day: 20.74 mpg (US)

CTS 3.6 - '08 Cadillac CTS
Sports Cars
90 day: 26.58 mpg (US)
Thanks: 24
Thanked 84 Times in 65 Posts
The op has it right, just pull the connector for the transducer. It will make the system think there's no pressure and thus oil in the system so it wont turn on.

__________________

  Reply With Quote
Old 12-07-2012, 11:52 PM   #12 (permalink)
Master EcoModder
 
Ryland's Avatar
 
Join Date: Jan 2008
Location: Western Wisconsin
Posts: 3,828

honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
Thanks: 813
Thanked 397 Times in 329 Posts
Our work truck does the same thing only you can manually turn it off by hitting the button.
As I understand it, vehicles that have the A/C come on more often last longer because the oil is getting circulated and the seals aren't drying out.
  Reply With Quote
Old 12-09-2012, 08:21 AM   #13 (permalink)
EcoModding Lurker
 
Join Date: Oct 2012
Location: muskoka
Posts: 80

Speedy Gonzales - '11 Ford Fiesta SES
Thanks: 7
Thanked 10 Times in 6 Posts
I know on the Fords, if the temp is below a certain temp (4 degrees C. iirc) the compressor won't kick on with defrost...
In my Fiesta, I monitor the outside temp on the dash and stay away from defrost/feet-defrost if the temp is too warm.
With that said, I'd love to rig up a switch to the compressor.
On my Focus SVT, it was simply a matter of unplugging the two prong electrical connection behind the HVAC knob.
This way if I need the air dried out, I can simply switch on the AC myself.
__________________

  Reply With Quote
Old 12-09-2012, 09:13 AM   #14 (permalink)
Master EcoModder
 
Join Date: Jan 2012
Location: United States
Posts: 857

spyder - '00 Toyota MR2 Spyder
House of Tudor
90 day: 31.43 mpg (US)
Thanks: 52
Thanked 83 Times in 68 Posts
New car problems. I guess this is one of the few features of (sorta) old cars that's good for fuel economy, no automatic anything besides fuel injection and all However I think it's probably offset by my "dumb" alternator which runs at 14.6V at anything above idle at all times... :/ Probably should look into doing something about that when the battery decides to quit due to being abusively charged all the time like that.
  Reply With Quote
Old 12-09-2012, 12:24 PM   #15 (permalink)
wdb
lurker's apprentice
 
Join Date: May 2008
Location: the Perimeter
Posts: 459

PlainJane - '12 Toyota Tacoma Base 4WD Access Cab
90 day: 20.98 mpg (US)
Thanks: 117
Thanked 73 Times in 56 Posts
Quote:
Originally Posted by ConnClark View Post
Actually its a safety feature to keep the windows from fogging up. At times I wish my AC actually worked.
What he said. The feds have standards for the windshield defrosting capabilities in passenger vehicles, and turning the AC on when defrost is selected is an easy way for manufacturers to meet the standard. Cars I'm familiar with have been wired this way since the 70's.

Quote:
Originally Posted by Frank Lee View Post
My '84 Tempos had nice illuminated a/c compressor switches; too bad that feature went away.
Went where? I have that in my 2008, 2005, and 1994 cars, and my wife has it in her 2011 car. In my 2005 car, when I select defrost and the AC comes on, I just turn it back off again by pushing the button. My 2008 car was a bit more nefarious and I had to disconnect a wire to defeat the AC when defrost is on. I can still just push the AC button and turn it on though, and I often do because that car is not exactly great at defrosting or defogging.
  Reply With Quote
Old 12-09-2012, 01:42 PM   #16 (permalink)
Master EcoModder
 
Join Date: Sep 2009
Location: williamsburg, virginia
Posts: 4,508

GEEZEE - '04 Suzuki GZ250
90 day: 79.35 mpg (US)

Sinatra - '92 Nissan Sentra XE
90 day: 38.19 mpg (US)

Super Cub - '65 honda 50
90 day: 170.73 mpg (US)
Thanks: 530
Thanked 1,290 Times in 838 Posts
The defroster works great without any AC. Maybe I just keep the WINDOWS cleaner than the average new car owner, including my wife. I think when I get ready to hook it back up, I'll just put a toggle switch in the ground circuit and hide it under the dash. That way I can run it occasionally in the winter to keep the seals from drying out. I guess I like some humidity more than none, which dries out my sinuses, then they will swell up. Happens in the fall when we first turn on the heat, even with a heat pump.

regards
Mech
  Reply With Quote
Old 12-09-2012, 03:09 PM   #17 (permalink)
ron
Master EcoModder
 
Join Date: Nov 2011
Location: slo county ca.
Posts: 277

double eagles - '99 Dodge ram slt
Team Cummins
90 day: 19.48 mpg (US)
Thanks: 24
Thanked 17 Times in 16 Posts
my techoma does the same thing on defrost, Im not sure if the compressor engages when defrost/floor heat is selected I will go outside pop the hood and check
  Reply With Quote
Old 12-09-2012, 03:19 PM   #18 (permalink)
ron
Master EcoModder
 
Join Date: Nov 2011
Location: slo county ca.
Posts: 277

double eagles - '99 Dodge ram slt
Team Cummins
90 day: 19.48 mpg (US)
Thanks: 24
Thanked 17 Times in 16 Posts
OK here is the answer to my own Q. , the compressor comes on in both positions defrost and floor/defrost both turn off when you manually turn off the fan. that switch Old Mechanic is talking about seems like the fix I like. one more thing on the todolist.
  Reply With Quote
Old 12-09-2012, 03:35 PM   #19 (permalink)
EcoModding Lurker
 
Join Date: Aug 2009
Location: Hamburg, New York
Posts: 95

Samantha - '94 Ford Ranger XL
90 day: 20.79 mpg (US)

Cassidy - '12 Chevrolet Silverado W/T 4x4
90 day: 15.87 mpg (US)
Thanks: 3
Thanked 6 Times in 5 Posts
My 2011 taco kicks on only with the defroster. I pull the fuse every winter because with my little 4 banger I can feel the power loss every time it kicks on and it's extremely annoying. Plus I see my mpg drop by about 2 on the scangauge every time it happens. I'm sure you're fine, OP, pulling the plug in va, but here in buffalo if I did that the plug would get corroded from the salt and calcium they use on the roads all winter long.
  Reply With Quote
Old 12-09-2012, 05:31 PM   #20 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 10,311

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,036
Thanked 1,881 Times in 1,251 Posts
Quote:
Went where? I have that in my 2008, 2005, and 1994 cars...
My '84s have it but my '92s don't. Also my '94 F150 doesn't.

__________________


  Reply With Quote
Reply  Post New Thread

Thread Tools





Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com