A/C Woes - Opinons/Guidance Welcomed

[06YarisRS]

Originally Posted by tmontague

I will test put my pressure's down the road and let you know
I have a feeling mine is slightly low on r134, I'll probably top up at the same time. Only problem with mine is at idle ons crazy got day it is not that cold. Still cool bit not nearly as cold as when the car is moving and the revs are up

Thanks, I look forward to it.

No doubt your underdrive pulley is affecting that as you mentioned earlier. Practically every car I've owned drops cold air at idle and increased revs and more air through the condensor brings it back to life. Think I'll check out my other Yaris and minvan as well. Gotta make those gauges pay for themselves. LOL.

How much does your A/C affect idle on the 2ZR? Mine seemed to labour slightly, until I removed a bit of the refrigerant. It still slows a few rpm when I engage A/C. I'm getting the impression that A/C systems are more power-robbing than I had initially thought.

[tmontague]

Originally Posted by 06YarisRS

How much does your A/C affect idle on the 2ZR? Mine seemed to labour slightly, until I removed a bit of the refrigerant. It still slows a few rpm when I engage A/C. I'm getting the impression that A/C systems are more power-robbing than I had initially thought.

The engine definitely has a noticeable load difference on it. For a small 4 banger it is quite a bit of draw on its overall power. I know dyno's online have shown anywhere from 3-6hp draw iirc. On a low powered engine this is a large percentage of the overall power output so it is more noticeable.

I'd purge a bit of your r134 out but I dont think you need to release much

[06YarisRS]

Originally Posted by tmontague

The engine definitely has a noticeable load difference on it. For a small 4 banger it is quite a bit of draw on its overall power. I know dyno's online have shown anywhere from 3-6hp draw iirc. On a low powered engine this is a large percentage of the overall power output so it is more noticeable.

I'd purge a bit of your r134 out but I dont think you need to release much

Yeah, it's significant. When I removed my manifold gauge high side port today, I noticed a bit of refrigerant bubbling around the bottom of fitting. I think the schrader valve is in a little fitting that may have loosened a bit after opening and closing the ports. I tightened it a bit and the bubbling stopped but the little sight glass seemed to not be full as before. My low side is reading 40, but the system didn't kick in today. I may have lost a little charge but I don't think any air was introduced into the system as it's still under pressure. I'll keep the system in its current state and in the spring, test it. At least I know all the components are functioning properly now - or at least I think they are.