Engine Performance problem 4 cyl Two Wheel Drive Automatic 130000 miles
Symptoms: Car bogs (If I could call it something) down when I floor the accelerator to merge into the freeway or pass.
Troubleshooting: Replaced Spark Plugs, Wires, Coil, TPS, MAP, had injectors professionally cleaned, had pressure pump and regulator checked, no egr that I know and no leaks in the manifold that I could find. The engine has 180 lbs on 3 cylinders and 200 on one. I had the transmission oil emptied including converter and filter replaced. Did find the hose going from intake manifold to Brake booster insanely loose. Looked like it expanded or like there was something between the intake manifold spicket and the hose. Because the hose hole was way larger than the manifold spicket it was attached to. I placed a hose clamp on it and tightened very tight. The improvement was significant but the acceleration lag is still there. Mileage is very poor when I try and accelerate gives me 22 mpg. A great leap from 36 mpg when accelerate slowly.
Have already cleaned the Mass Air Flow sensor. New air filter. Recently bought the car and it passed smog. Passing smog should eliminate a clogged Catalytic Converter or muffler? For safe measure I also replaced the muffler with a high flow muffler.
Connected it to an OBD and found no codes and there is no engine light on.
The 2002 dodge neon does not have a fuel filter that can be replaced like the common car. It is built into the fuel pump and is inside the gas tank. Replacing it entails replacing the fuel pump or so I read.
To dismiss the suspicion of a bad fuel pump I had the fuel line pressure and pressure valve tested by a mechanic. He said they were fine. Is it correct to assume the fuel filter in the pump is not plugged?
However, I don't know if the mechanic tested the fuel line under a SUDDEN load or even just at high rpm were my troubles begin "On sudden take off to pass."
Is there a test I could do on my own to check the fuel pump and filter without the use of pressure valve?
Please help me the mystery is crazy
have the same problem?
Sunday, January 4th, 2009 AT 7:20 PM