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Join Date: Feb 2009
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Re: Bogging Down when pressing the gas pedal
I have a similar problem on my 05 Convertible 5 speed but not as bad. When I down shift to go around a corner it doesn't want to pick up speed again, or if I down shift to go up a hill on the hiway it will do the same thing. For about 2-3 seconds then it will go ahead and pick up speed and be okay.
On your problem, it sounds like it is running lean. It doesn't have the fuel to make the power. Two causes for this, one the fuel pump is weak and not getting enough fuel to the injectors. This will not throw a code, there is not pressure gauge on the fuel for the computer to check. I have a separate fuel pump with a long hose on it and speaker wire I can put in the passenger floor in a gallon container of fuel. Refrigerator jugs from Wal-Mart work great, small hole in top, gallon capacity. You can hose clamp the line to the fuel rail, be sure to take the fuel pump relay out so you don't spray fuel everywhere. I then connect the speaker wire to the battery to run the fuel pump. It works great to check fuel pumps and to get cars home or move them around when the fuel pump does go bad. You could take the car for a test drive and see if it fixes the problem. The kind and make of the fuel pump doesn't matter. I don't use the whole assembly, I just use the pump inside the assembly. It is about 1 1/4" in diameter and about 6" long with battery leads and a 5/16" hose barb on one end. They are pretty much the same on all Chrysler cars. I got mine out of a salvage yard. Works great.
Item #2 is that the O2 sensor, especially the one in the manifold is stuck rich. This makes the computer try to lean the system out when it really isn't lean to start with. You might try unplugging it and see if it makes a difference. It will still run, just throw a code. I think if it doesn't get a reading it will fault to rich to keep from damaging the engine. Which, should make it run incredibly better than it is now.