Air Con Power Drain

Air Con Power Drain Rate Topic:

#1 Puma_Naan

Group: Members
Posts: 115
Joined: 15-December 05

Posted 15 December 2005 - 03:46 PM

Hello, Does anyone suffer from power loss whilst the air con is on? its nuttin serious but when i try and pull away it pulls off like a morris minor, then bang...powerrrrrrr, then runs ok but it defo loses power, is this common or have i got ellecy problems, other than that it hasn`t put a foot wrong in

10 months.....

#2 Guest_Matt and Tiggr_*

Group: Guests

Posted 15 December 2005 - 03:48 PM

Yip, its around 8%

On wide open throttle, the ECU cuts the power to the Aircon pump, hence why you get power.

Most noticeable when driving steady and you switch the aircon off.

Run aircon at least once a month, else the pump seals dry out

#3 MikePass

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Joined: 25-January 04
Location:North London

Posted 15 December 2005 - 03:49 PM

This question always gets asked, it should be in the FAQ.

But it's not, yet.

Nope, not a problem, just one of the (very few) Puma annoyances.

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#4 Puma_Naan

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Joined: 15-December 05

Posted 15 December 2005 - 03:55 PM

Thanks dudes! i shall rest easy and attend to my bald tyres instead lol

#5 spenspuma

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Posted 15 December 2005 - 06:25 PM

yep i get it too....but even worse, some times the engine will cut out when the aircon is on, for instance when im approaching a junction and the revs are low...cant be arsed to take it in...specially now its winter!!

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#6 LiamPurcell

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Posts: 251
Joined: 06-July 04

Posted 15 December 2005 - 06:38 PM

matt when you say 8%, i presume you mean 8% of total power (so about 10hp) which when pootling around town (say pulling away at 1800rpm the engine develops about 30hp). thats a good third of the power being sapped by the air con. is that how it works?

#7 Puma_Naan

Group: Members
Posts: 115
Joined: 15-December 05

Posted 16 December 2005 - 01:02 PM

I was gonna get it looked at but now i just g

ive it 7 grand before droppping the clutch to "pull away" safely...

#8 Guest_Matt and Tiggr_*

Group: Guests

Posted 16 December 2005 - 01:07 PM

QUOTE (LiamPurcell @ Dec 15 2005, 06:38 PM) <{POST_SNAPBACK}>

Yip.

Aircon pump requires same amount of power to work regardless of how much power the engine is producing.

to show this. with car at stand still, air con on, try going for full steering lock, you may actually stall the engine.

What should happen is the ECU allows extra fuel in to compensate and ups the revs.

Therefore at lower speeds, the brain will either cut the aircon electrical power to the pump thereby disengaging it from the aux belt drive, or increase the fueling to the engine.

Either way, aircon in traffic is a good way of burning a lot of extra fuel.

#9 happy-kat

Group: Admin
Posts: 21813
Joined: 10-February 03

Posted 16 December 2005 - 05:45 PM

QUOTE (MikePass @ Dec 15 2005, 03:49 PM) <{POST_SNAPBACK}>

This question always gets asked, it should be in the FAQ.

But it's not, yet.

Nope, not a problem, just one of the (very few) Puma annoyances.

Mike you could add it yourself to the Knowledge Base

please

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