I've cleaned the throttle body around 5,000 miles ago. My car ran well. It still runs well. But when i turn the AC on the car seems somewhat sluggish even more then before. NY was up in the 90s the last two days and this was when it seemed the worst. Any other day performance is fine. Should i be worried?
Car seems a little slow or sluggish with AC on.
- Thread starter kjkim93
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Wooluf1952
Member
I was just thinking the same thing this week...I live in NY too and ran the A/C hard. I got too used to driving it with no A/C and now that I need it...powerloss. I usually cruise with windows down on the hwy, but this week I needed the TB around town and the loss of acceleration is quite noticeable. It dogs thru first and until upper end of 2nd gear and then takes off, shifts, then dogs until the mid range of 3rd gear and takes off again, shifts and has no noticeable loss afterwards until it drops a gear or two with traffic and lights. I'm assuming that's just the way it is...nothing to be done. I'm still getting 14.5-15mpg mixed driving with A/C on and being slightly heavy on the gas pedal.
MacMan
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- Mar 3, 2012
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pejeeper said:
Correct. The torque curve starts to pick up at approx. 3600 RPM....that's the power "surge" you feel.
It's one of the things that I think the engineers should have fixed....more low end torque. 3600 is pretty high for a "grocery getter" vehicle.
Simon01
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- Dec 5, 2011
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I don't think you have anything to worry about. AC robs upwards of 20 hp from your engine. Combine that with the high temps, making the AC run more often. It probably seems worse when you are driving around town at lower speeds. The AC works best when the engine is above 1,000 RPM's at least and when you are moving at a good speed to air is flowing through the condensor.
Through our little serpentine belt? Wouldn't have thought it was capable of transmitting that much HP.Simon01 said:
Muffler shops can test the backpressure generated by the cat by drilling a hole upstream from it, or removing the O2 sensor from the exhaust manifold, and then installing a gauge temporarily.
Sparky
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Mine always is more doggish when the AC is on. I think it is a combined effect from the compressor and the fan. Sometimes if I know I'll need more power (like a really short entrance ramp) I'll kick off the AC for a moment. I don't think it is that abnormal, and I'm pretty sure my cat is OK as it runs normally otherwise and mpg is where it belongs.
I have been thinking lately about retrofitting an electric fan onto the front of the A/C condenser so it works a little more efficiently and works better in slow traffic or stop n go spots.
Also, the cooler you can get the condenser the lower the pressure will drop on the high side, making your compressor not work so hard and cooling off your evaporator more efficiently lowering the amount of time the compressor runs to cool the interior.
Also, the cooler you can get the condenser the lower the pressure will drop on the high side, making your compressor not work so hard and cooling off your evaporator more efficiently lowering the amount of time the compressor runs to cool the interior.
I was thinking of doing the same thing, just in case I see that temp getting hot past 210 from using the ac or just sitting in traffic during a summer heat wave