2004 chevy impala solenoid stuck open

SOURCE: ENGINE LACKS POWER (4AGE) 1600 CC, 4 CYL, TWIN CAM

I had the fuel pump recently replaced i just assumed the fuel filter was replaced also cause my fuel pump is in the gas tank. My air filter is clean and I have 4 fuel injectors, no carburetor. A friend of mine who has looked at my car for me says it sounds like there is some kind of air leak but can't figure out where it is coming from?

SOURCE: check engine light, power steering indicator on,

sounds like you have a problem with your vehicle speed sensor this sensor is essential for the correct operation of many control units on your vehicle best get a diagnostic test on your vehicle to confirm this

SOURCE: Transmission hesitates shifting into second and perhaps third gear when driving slow. When acceleration is positive transmission shifts smoothly. Reference "99 Mercury Transmission" as Subject when

Several things could be causing your problem:

1. Auto transmission fluid is low
2. Auto transmission fluid needs changing; this is an area that gets neglected by a lot of people;check the fluid and if its brown or gives off a burning smell, it needs changing. Very old transmission fluid will cause slipping in the transmission; if this is the case, it should be changed along with the filter

SOURCE: the transmission wont shift out of 2nd gear again.

i can answer part of your question. the front wheel speed sensors are for abs and trac control only. these will not affect the speedo your problem is some where else. sorry i have not had this prob yet good luck. you could have to replace the rear wheel speed sensor again. they are not that good. and after market are even worse.

SOURCE: had down shifting

1,change the oil - original vw is light brown ( NOT red )
-reprogram the throttle body
- adapting the kick down position