Did the ac repair include any compressor work? compressor load can have a big impact if failing or having issues. I had a whining compressor once that was almost seizing and putting heavy load on the engine. The car is old so I just took the compressor out of the loop.
Significant drop in MPG with AC on. Normal or something wrong?
- Thread starter Jonas
- Start date
I have had some 4-cyl cars in the past that had a noticeable power drop when the AC was in use. I never bothered to try and determine the impact to fuel economy, but I am sure it would have been noticeable. For something like my Ram 2500, the AC does not seem to have an impact at all.
If the AC is blowing cold and the engine seems to run well I would just run it and see how it does over the next few tanks.
If the AC is blowing cold and the engine seems to run well I would just run it and see how it does over the next few tanks.
Sound like small fuel injector leak?
The bearings will be damaged.
Yes, I doubt it with an automatic tensioner.
I think there are too many variables in your all city, lots of idling driving to attribute all of the observed MPG change to just the new compressor.
But fix your tire inflation while you get more data points.
But fix your tire inflation while you get more data points.
You're probably right. I'll report back if a trend develops.
AC uses a lot of gas and that’s a fact
The fact people don’t notice is Because they don’t pay much attention.
Penny pinchers don’t run AC for a reason
ecomodder.com
The fact people don’t notice is Because they don’t pay much attention.
Penny pinchers don’t run AC for a reason
ecomodder.com
Could it be overcharged? It's not very cold. My mechanic said it wasn't very cold when he fixed it and said it was because I used cheap r-134a. I don't know if I buy that. If overcharged, it would explain the tank in MPG and the noticeable lack of power. Also, my new cabin air filter is bent up in there, but the always do that (this is my third one). Could that have anything to do with it not being cold? It was 90 today and my AC was just slightly better than nothing. Any thoughts?
In old days, most 4-cyl cars didn't come with factory air.
if you wanted air, you buy a 6 or 8-cyl.
I can't tell. Seems like it's running all the time. It has a control valve rather than a standard clutch. I can't see if it's running because the pulley is one piece and spins all the time.
I asked because my experience with Japanese cars is that they cycle on and off rather than just being on all the time. That obviously helps with fuel economy.
I’m just wondering if something didn’t get connected properly?
There are only two (electrical) connections I know of. I'm sure they're fine, or it wouldn't work. How cold should AC be? I feel like it should be capable of being so cold, I'd need to turn it down sometimes, but on max for an hour, my cabin is maybe 15 degrees cooler than outside.
That depends on the vehicle. I would think the AC mechanic can test the temperature coming out of the vents. It’s a good question too because if your car has auto climate control then you will have a temperature sensor inside somewhere.
I set mine to 66F year round unless it gets really cold. If your AC is dropping the temp inside by 15 degrees that sounds warm, especially if it’s 90 or more outside.
My car only measures outside temp. I'll put a thermometer in the vent and see what I get.
1.8 engine? My wife's 2010 non-GT would average about 22 with almost all city driving in the summer.
If this is a 1.8, do check the belt. Ours didn't have a tensioner--it was tightened the old school way at the alternator bracket.
If this is a 1.8, do check the belt. Ours didn't have a tensioner--it was tightened the old school way at the alternator bracket.
