2004 chrysler pacifica gas gauge drops from half tank to empty

If you can't put much fuel in i's probably not empty! If there is not a big puddle of fuel underneath then your guage is broken.

It could be the gauge on the dash or the sending unit in the fuel tank is bad. If it is the sending unit ,the gas tank will most likely have to be taken out. And if the dash gauge the dash will have to be taken apart. Diagnosis of Stuck Fuel Gauge Is it Gauge or Sending Unit Here is a video how to test it.

you may have a problem with the fuel level sensor were the lower part of the sensor that indicates how much fuel there is below half a tank.the only way is to remove the unit from the tank and inspect for damage,it may have to be replaced.

just had to replace both sending unites in the tanks problem fixed

this problem is caused by a defective gas gage sending unit inside the gas tank

earth lead on gas tank loose /adrift,check fuses are clean and tight

The problem will get worse, to the point that it will leave you stranded, out of gas. The solution is simple but most dealers don't catch it. They try fuel pumps, computer updates, sensors and the problem persists. You can fix this problem yourself and without spending a nickel. Want to know how I know? I've owned two Pacifica's and both have done this. Here's why: The Pacifica has a very unique and poorly designed fuel storage system. It uses what is refered to as a saddle tank. This is so they can use the same tank in both the all wheel drive and the front wheel drive versions. If you look underneath you will see it actually looks like two tanks. The driver side is the fill side and the passenger side is the delivery side. There are actually two fuel pumps, a main pump (pumps gas to the engine) and a equalization pump (pumps fuel from the the fill side to the delivery side of the saddle tank. The problem that you are experiencing carries with it several symptoms; running out of gas when the tank is half full, the gas gauge dropping suddenly at half full, and the inability to pump more gas into the tank without shaking the car back and forth and/or pumping very slowly. This is because of the way the two sending units inside the tank send their signals to the gas gauge and the fact that only when the fill side of the tank is 100% full, can some of the gas flow over the top of the hump to the delivery side tank. You can replace pumps all day long and most likely still have the problem. So what's the fix? It's simple. Underneath the vehicle, inline with the emissions lines going to the gas tank, about middle of the vehicle, there is a small plastic air inlet filter about the size of 50 cent piece mounted to the floor of the vehicle. It is responsible for venting the tanks pressure, allowing fuel to flow into the delivery side tank. It get's full of dirt and debris. Replace it a cost of about $3.50 or just blow it out with compressed air. If you don't want to do it yourself, help those dealers out - point them in the right direction, or else they will be running in circles trying to fix the problem. NOTE: this is only a problem on Pacifica's, not other vehicles. More info on this issue here; http://www.dodgeboard.com/forums/index.php?threads/my-crazy-gas-gauge.6381/

r u sure? sounds like the float is sticking.

Check the vent on the filler tubes for bent or blocked areas.
As fuel goes in air must go out.
New fuel tank for $900! ouch!
It is not likely the tank.
But ......if the vents are OK and it is a defect in the tank ..... put a mint used one in.

My fan stopped blowing too!! I was worried that my compressor had went out. The mechanic said that the blower had burned out and he charged me 169.00 for the part and 50.00 for labor.

I have a 2004 Pacifica with 58K miles.