Man, the A/C really eats MPG
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 1,211
Likes: 2
From: Dumas Arkansas
Man, the A/C really eats MPG
I'm getting around 16-18mpg with the a/c on and with it off its back up to 22-24. She also feels like she's going to die at the light and now mixed in hard cranking with the a/c on. After two year's of ownership, it's my 2nd week with air so it could be worse. There’s no SES light just curious with the a/c being Pac Man.
Team Owner
Joined: Feb 2002
Posts: 29,702
Likes: 0
From: Sometimes I wonder... why is that frisbee getting bigger? Then it hits me.
Cruise-In X Veteran
St. Jude Donor '06
If the AC is causing the car to almost die at a light then I would be looking at the compressor. Sounds like it is binding a bit and causing the car to have to work harder to move the pulley.
Tech Contributor
Joined: Aug 2006
Posts: 9,933
Likes: 103
From: Peoria Arizona.. Resident Gold Cylon
I'm getting around 16-18mpg with the a/c on and with it off its back up to 22-24. She also feels like she's going to die at the light and now mixed in hard cranking with the a/c on. After two year's of ownership, it's my 2nd week with air so it could be worse. There’s no SES light just curious with the a/c being Pac Man.
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
mpg
I get 30 mpg on the freeway with the air on (according to the dash) and average with air running, part city, part freeway is 22 mpg.
check your compressor pressures to make sure the system is not over serviced. that could assist in compressor resistance.
maybe it's time to have the system evacuated, maybe you are making ice in the A/C system, and your freon has ice crystals and is making snow cones inside the hoses.
check your compressor pressures to make sure the system is not over serviced. that could assist in compressor resistance.
maybe it's time to have the system evacuated, maybe you are making ice in the A/C system, and your freon has ice crystals and is making snow cones inside the hoses.
Last edited by coupeguy2001; Jun 8, 2007 at 12:13 PM.
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
air conditioning
Hmmmmmm ................notice the ones responding to this thread need their air to survive? We are air conditioning event oriented.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 1,211
Likes: 2
From: Dumas Arkansas
Yes, around town. Every thing is fine going down the hwy it's only when stopping that the car starts shuddering. Now I did say that I was without a/c for two year's but it's really around 6 months ever since the shop guy installed a new a/c compressor clutch. He never put the freon back in because my blower motor wouldn't kick on. So in other words, the compressor was off completely for 6 months. I'll go check it out and the IAC too. Thanks
Tech Contributor
Joined: Aug 2006
Posts: 9,933
Likes: 103
From: Peoria Arizona.. Resident Gold Cylon
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Drifting
Joined: Aug 2006
Posts: 1,326
Likes: 18
From: Los Angeles California
I get 30 mpg on the freeway with the air on (according to the dash) and average with air running, part city, part freeway is 22 mpg.
check your compressor pressures to make sure the system is not over serviced. that could assist in compressor resistance.
maybe it's time to have the system evacuated, maybe you are making ice in the A/C system, and your freon has ice crystals and is making snow cones inside the hoses.
check your compressor pressures to make sure the system is not over serviced. that could assist in compressor resistance.
maybe it's time to have the system evacuated, maybe you are making ice in the A/C system, and your freon has ice crystals and is making snow cones inside the hoses.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Any chance that there's been too much refrigerant installed? This makes a compressor work harder and is also not good for it. If in doubt, have your pressures checked and compare them for the ambient temperature at that time. Even in town your mileage penalty should not be so severe.
