You must understand that you haven't provided any useful information that could help us figure out the problem.
"Then put full tank in it". I assume you mean you filled the fuel tank with gas. The fuel pump is inside the tank, so I don't know what they could have broken off, unless you're referring to the connectors for the filter. It's common for those to get corroded and not release properly from the filter. Inexpensive repair kits are availalbe for them.
Except for the diesel trucks, you will never solve a running problem on a Chrysler product by replacing the fuel filter. The air filter doesn't fit the description of the problem either, and changing the oil surely won't have any effect.
"Engine control thingy"? Come on. That could apply to dozens of different components, sensors, relays, or other parts. There is no chemical you're going to stick in the fuel tank to magically fix some problem. If you don't understand how to diagnose the problem, it is best left to a professional. Blindly throwing parts at it, then not understanding why the problem still exists, is the least effective, most costly way to solve it. In addition, every time you replace something or change something, you add another variable the could impede your mechanic's ability to use logic and other diagnostic clues to quickly come up with a solution.
"What else can it be?" There are hundreds of parts that have to work together to make the engine run right. The best thing you can do is to be very observant of any clues, observations, or symptoms that might help your mechanic figure out the problem.
Does the engine always have to warm up before the problem occurs or could it occur right away? Does the problem occur at any speed, just on the highway, or just at low speeds? Is it more likely to occur when you're holding the gas pedal steady, pushing it down, or releasing it? Does it run better when the fuel tank gets near empty? Is there anything you can do to make it act up or run worse? Your mechanic is your ally in finding the cause of the problem. Any hints you can provide will save him the time, (and you the money), that it takes to come up with the diagnosis. You should be aware too that people who are often convinced that mechanics are ripping them off usually are unable to assist the repair process by supplying these clues. The better understanding a person has about providing information, the more likely the person is to understand the difficulty that can be involved in finding some of these problems.
Tuesday, February 9th, 2010 AT 2:21 AM