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97 buick lesabre, going uphill a/c switches from vent to defrost and a loss of engine power

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Posted on Jan 02, 2017

  • 41 Answers

SOURCE: Loss of power uphills and shifting improperly.

It sounds very much like your clutch is slipping. If the engine revs continue to rise when in gear and the car does not increase it's speed accordingly then if it is a manual car then you need a new clutch.

Posted on Mar 20, 2009

  • 37 Answers

SOURCE: Blower motor vent selection switch not working

the hvac selector switch in the dash may be the problem.You need to remove the switch and look at the connector on the back of switch,see if there are any burnt wires at the connector or switch.It's all electronic and the switches have been known to burn out on this and other model.

Posted on May 26, 2009

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SOURCE: why does my car loose power going uphill

YOU COULD HAVE CLOGGED FUEL FILTER AND FUEL INJECTORS.ALSO CHECK TRANSMISSION FLUID.IF LOW TRANSMISSION WILL SLIP GOING UP HILL.NOT ENOUGH FLUID TO BUILD UP PRESSURE FOR OVER DRIVE.

Posted on Oct 06, 2009

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1 Answer

2000 buick lesabre blows A/C air out of defrost vents only. No air coming out of dash vents.


The mode door actuator is not switching. Most of the time it's the actuator that has went bad.

Jun 21, 2017 | 2000 Buick LeSabre

1 Answer

AC BLOWING THROUGH DEFROSTER VENTS


on the controls for you AC there is settings that send it where you want, floor, dash, vent, defrost. choose vent. Also notorious for vent doors getting stuck from dirt, leaves etc going down the breather under your hood on top the rear fire wall down the holes and clogging the louvers so they cant switch over. check the setting but if not, this is really a job for buick. pretty complicated and risky to mess with for the novice machanic.

Apr 04, 2014 | 1997 Buick LeSabre

1 Answer

1995 buick lesabre-no air thruvents regardless of setting


u have loss of vavum going to the climet coltroler look for bent or broken lines behind the dash

Apr 10, 2013 | 1995 Buick LeSabre

1 Answer

Buick lesabre 97 car alarm goes off for no reason why?


Most likely, you have a vacuum leak if steam is coming from your defrost vent in a 1997 Buick LeSabre. There are approximately 600 million passenger cars worldwide (roughly one car per eleven people). --------------------------------------------------------------------------------------
ZED-Bull

Jan 28, 2013 | 1997 Buick LeSabre

1 Answer

2003 Grand Marquis LS Ultimate ac switches from blowing in dash vents to defroster vents on its own. What controls the valve and where is it located?


Does it only change when going uphill, or under heavy acceleration? Or is it just when ever it feels like it? Generally, it's vacuum controlled and on a Ford, loss of vacuum when accelerating or pulling a grade under heavy loads can be normal, causing the air to come out of the defrost. To answer your question, the blower door is located in the dash, generally behind the radio area.

Good luck!

May 22, 2010 | 2003 Mercury Grand Marquis

1 Answer

I have a 1993 buick lesabre and i was wanting to know if the fact that it has dirty antifreeze is that why my defroster doesnt work very well?


defrost and heat come from same place .if your heat is good but defrost is not then i think you might have defrost vent doors half stuck check them for good flow should be the same flow as to floor vents.

Jan 05, 2010 | 1993 Buick LeSabre

1 Answer

1999 Buick LeSabre - A/C blows only on windshield


Inside the heater box (under the dashboard) there are actuators that are similar to the ones that open your power door locks, they do go bad especially if any water leaks in from a bad heater core or windshield leak.(down the defrost vent grate). Also old age, my truck is a 2000 and I have replaced a couple of actuators.

Sep 03, 2009 | 1999 Buick LeSabre

1 Answer

Air won't switch to defrost vents


This system works with vacuum control doors. If you have a vacuum hose off under your hood it will cause this problem. Look on the passenger side near the evaporator - there should be a little round plastic bulb looking device - make sure it has vacuum to it. Also, check for other vacuum leaks in that area.

Dec 17, 2008 | 1989 Buick LeSabre

1 Answer

Buick LeSabre 2000 has hesitation uphills


It could be the fuel filter. Check fuel pressure and volume.

Jul 08, 2008 | 2000 Buick LeSabre

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