This issue started a few months ago shortly after coming home from Charlotte NC, I live in South Carolina on the Georgia border. This was around 10/17.I took it to the dealer I bought the car from and they could not find anything. I had just broke 30,000 miles at the time and I found that it was time for plugs and an air filter so I changed those out on 11/20 before another trip to Charlotte NC. My MPGs was about 5 less this trip then it was the last one. Also every trip to and from work is about 5 mpg lower then normal. I know winter gas can lower the MPG but it has not in past years. I tend to stop using my AC round the same time the winter gas is put out so I think that balances my MPGs. Putting in new plugs and air filter has not helped. I have also checked the fuses and my hoses to make sure I didn't have any leaks. When I go up hills I can feel the loss of power and a lot of hesitation. I have a mopar 13 version of the dart. I tend to do about 80 (10 over the speed limit) every day to and from work. The way I drive has not changed. I did run seafoam gas treatment through the car with my 2nd charlotte trip to see if that would help. It did not. Here’s something that I found out recently. It finally started getting cold here last week. Last Monday Tuesday and Wednesday it was in the high 20's low 30's in the am and would warm up through the day, then Thursday and Friday was in the 40's. Anyway long story short on the cold mornings my MPG's were back to where they should be(around 30) Thursday and Friday they were back down into the 25 MPG range so I thought it was a fluke. Also when my MPGs are low my car also hesitates a lot more than it does when the weather is cold. This morning it was 29 outside when i left the house and my MPGs coming to work today was 30.5...so after all that does anybody know why would my MPG's go up when it’s cold? I am so tired of my car running bad that I am trying this website, I have posted in a dart forum with no help, I have also taken it to a 2nd dealer who did a few system updates but that did not help either. Since its not throwing any codes they are no able to find anything. IS there anything else that i can check or have checked at another dealership? Would the Fuel filter or ECM anything that comes to mind that will drop the MPGs that much?
This is my fuelly link if you would like to look at the chart of my MPG, I have logged every fill up since buying the car.
http://www.fuelly.com/car/dodge/dart/2013/theblueghost/203567
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Monday, January 11th, 2016 AT 12:10 PM
