ac question

[henry tanner]

when i get on the gas hard. my ac sometimes shut off or doesnot blow cold air. what`s upo with that/ any ideas? i am at a lost. :banghead::banghead:

thanks

:banana:

 

[Kevin Palmer]

That is designed that way to insure your engine has as much power available to itself when accelerating hard.



The A/C compressor takes a fair amount of energy to operate. So,,, under heavy acceleration it kicks the compressor off giving the engine as much power as possible to transfer power to the wheels..

 

[Gavin Allan]

I wish there was a way to override that. As I get older, I value cooling over accelleration. If I were really needing the power, the AC switch is not hard to push for extra power by turning it off.

 

[Tom Schindler]

I wish there was a way to override that. As I get older, I value cooling over accelleration. If I were really needing the power, the AC switch is not hard to push for extra power by turning it off.

You have a way to override it. Don't accelerate fast.:banana:





Tom

 

[henry tanner]

thanks. glad i don`t have to take to get fixed again.

:banana::driving::supercool:

 

[Gavin Allan]

Who can accellerate fast in a 6,000 lb vehicle with just a 300 hp V8 and very tall gearing? :boohoo:

 

[Dre L]

Shuts off as in it starts blowing warmer air, or shuts off as in it stops blowing all together?



There's a little tube with a 90 degree elbow in the passenger footwell, up under the glove box. It connects to a nipple on a round black cylinder. If your passengers have kicked it loose, the AC won't blow over 2000RPM except for in defroster mode.



Just reconnect it.



@Gavin: I don't know about your question but a 4700Lb vehicle with 205HP V6, 240TQ and a 4.10 gearing accelerates pretty fast for most purposes.

 

[Tom Schindler]

Shuts off as in it starts blowing warmer air, or shuts off as in it stops blowing all together?

When flooring it, the AC compressor shuts off to give the engine as much power as possible.





Tom

 

[Dre L]

Right, I know that part, the air gets warmer but the vents still blow air (normal).



OP indicated:

my ac sometimes shut off or doesnot blow cold air.

If the blower is shutting off, it may be what I described above. I can't remember what the reason was, but it was explained years ago when I brought it up and then found the stupid thing dangling in the passenger footwell. IIRC there is also a hissing noise when you shut off the engine, I think it was a vaccum of some kind.

 

[ZoNiE]

The AC shuts off at a certain RPM to prevent over-pressurization of the system. Not for more power. R134A systems run higher pressure than the old R12, so newer vehicles cut out sooner.