Four problems related to other fuel system tank filling/charging have been reported for the 2005 Ford Mustang. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Ford Mustang based on all problems reported for the 2005 Mustang.
Since about a year ago, November 2013, this vehicle has shown multiple issues. To start, it is an automatic 05 Mustang which, the more I read online, the more that I seem to find that many have these exact same or very similar issues. Initially the dash cluster (everything besides the tachometer) was not functioning properly. The speedometer would get stuck at 20 mph but still move acting as though the 20 mph was the 0 mph mark (so 35 mph = 15 mph). More recently the gas gauge has stopped working, it sits at empty even after plenty of gas has been put into it. The temperature gauge also gets stuck often, still moving as the speedometer does. Not too long after these issues started occurring, when I went to fill up the gas tank it wouldn't take the gas as it normally would. Sometimes only a couple dollars worth would be in before it clicked off. After paying closer attention I have also noticed sometimes gas actually splashes out when filling it up even though it is definitely not full. Much more recently the vehicle has has worrying issues. At one point while driving on the freeway at 70 mph the vehicle suddenly started to decelerate on its own, even while I was pressing on the gas pedal. I pulled it off to the side, shut it off completely, started it up and it was as though nothing happened. Ever since that incident though it has been running a bit louder and now it seems a possible misfire is happening with one of the cylinders occasionally. The vehicle has a delayed and very hard shift from third to fourth gear. It is not as though the vehicle has not been taken care of, and for a 2005 the mileage is pretty low still. At least one or two of these issues seem to be a safety concern, and it is very obvious after researching online that these issues are prevalent in tons of these exact same vehicles.
I got the car @42,500 or so miles. There was a bad puddle of water after it rained. Near the Smart junction box is where it appears to be getting in. I have read alot of complaints online about this issue. For sure a defect that Ford should fix. . . As another person on this site mentioned, I am sure that major electrical damage could potentially take place (I forced myself to cover the car at all times). The gas tank is difficult to fill up all the way. I cannot simply pull the gas pump "trigger" and lock it. The pump stops, due to the trigger being "tripped" (as if the tank was full). So I have to hold down the trigger again (the fuel pump usually gets "triggered" 20 times per every filling of the tank). Super annoying and a known defect that needs a new gas tank to be corrected. How does Ford not correct this?.
Over time, the vehicle gas tank has developed a condition where filling up the tank prematurely causes the gas pump to shut off prior to the tank being full of gas. Typically after only a few seconds. If you try to engage the pump again, a buildup of pressure can cause gasoline to shoot back out of the tank and all over the ground and the person pumping gas. The only way around this is to fill the tank with the nozzle upside down. Somehow this disengages whatever safety mechanism the gas pump has, and allows the user to pump a full tank of gas. Ford even has a TSB related to this issue. It states something to the point of a design flaw in the gas tank. It's only remedy is to replace the tank, or they literally suggest going to a different gas station. Some pumps are different and that used to work, but at this point there is not pump that I do not encounter this issue with.
Takata recall as well as problems filling the gas tank. While stationary trying to pump gas in to the gas tank the gas pump will shut off after pumping no ore than 1/16 of a tank then requiring you to dribble gas in to the tank with the pump regularly shutting off every few seconds and never filling the tank with out the pump shutting off completely, and this happens at all pumps in every state and every brand of gas. Once you pump as much gas as the pump will allow you have to hold te throttle pedal down to the floor to get the car to start and then you have to feather the pedal to keep the engine running which causes the engine to race and is very dangerous.