A/C makes my car run REALLY slow.

[dmontzsta]

I dont know why it does this, I have never had any other car do this. When my A/C is on the car is a complete dog. I can punch it and it sounds strong, but it just does not move like it does when it is off. It also is making a sound like a supercharger when it is on. The compressor is pretty loud at high rpm. My car would probably lose to a civic with the A/C on.

Any ideas?

 

[04gtdrop]

I've heard that you lose 20% of your power when the a/c is on. But its supposed to cut off at WOT.....maybe someone else with more knowledge will chime in.

 

[kid rock]

I've heard that you lose 20% of your power when the a/c is on. But its supposed to cut off at WOT.....maybe someone else with more knowledge will chime in.

that explains why when i boot it, the a/c stops blowing cold, thanks man

oh and sorry for taking over your thread, you can have it back now its used anyway lol

Si

P.S do you actually lose 20% then??

 

[streethorse]

Something I noticed after driving my 99 which had steeda UDP's, and
my 04 which doesnt have them yet. The air conditioner wont put as
big of a strain on the engine, seems like 50% less hp draw to me w/UDP's.
Anyone else notice that?

 

[nwapache]

A/C mine does the same thing, the compressor leeches mucho HP. If you wanna go fast leave the g/f at home and open the windows

 

[Yellow2002GT]

Yea....I have underdrive pulleys and a meizure electric water pump and don't notice much if any power loss!

"ED"

 

[Mike97gt]

with your a/c making that much noise and power loss I think you have a seized or partially seized up compressor..


So with the A/C off you don't have the noise you described but with the a/c engaged you do? if so then buy a new compressor.

 

[dmontzsta]

with your a/c making that much noise and power loss I think you have a seized or partially seized up compressor..


So with the A/C off you don't have the noise you described but with the a/c engaged you do? if so then buy a new compressor.

That is correct. Sometimes it does not feel that cold either, dont know if it is cause of the 100 degree temps outside though. I dont know if it is normal, but at an idle with the A/C on, it will kick my rpm up a little, then it backs down, you can hear the compressor kicking on and off.

 

[twogts4us]

Get gears - 4.10 or 4.30...that'll solve most of the loss of power issue.

 

[white-04]

My tuner did something that has made it rob less horsepower. It kicks on more frequently, just not as power robbing when it does.

 

[Mustang5L5]

The problem with the A/C is that it tends to heat soak the engine if you run it for a while in traffic. All the hot air from the condensor mixes with the hot air from the radiator and heatsoaks your engine bay and your car ends up a total dog.

Doesn't matter if it kicks out at WOT either, you lose a LOT of power.

If i sit in traffic for 20 mins on a hot 90+ degree day and then get to an area when i can floor it, my car is such a dog. It will bog off the line and then WOT feels like 1/4 throttle on a normal day.

I never notice such a dramatic loss in any other vehicles.

My A/C is ice cold though. I love it

 

[Cantslowdown]

Mine dosent lose much power at all..

 

[Pennywise2]

I agree with Mike your A/C compressor is probably bad
and needs to be replaced.My A/C compressor on my car
was not blowing out any cold air.I had my mechanic look
at it and it turned out that my seals in my A/C compressor had two holes in them and the clutches were
bad.I had to recharge the system too.I ended up installing a brand new Motorcraft A/C compressor and recharging the system and the problem was gone.

 

[COramprat]

Try a recharge first. Could just be you are low on refridgerant. If you have a mechanic you can trust have the system checked out.

 

[sgarlic]

Ever drive a 4 cylinder stick with the A/C on? Now THAT'S a dog.

 

[BurningRubber]

Yeah I can feel mine kick on and off, and when it kicks off it sucks alot of power out of the car. I can imagine it also kills MPG.