I change the battery on my 2002 galant and after I finished, the car keeps shuting off if I let go my foot from the gas pedal. what can be causing this? before the car would stay around 1000 RPM's now the needle goes all the way to the bottom causing the car to shut off. help please

Check the idle position sensor.

check fuel pump pressure and fuel filter

Did you ever figure out what was wrong with your car? This exact thing happened to my car today.

sounds like you need to replace the temp sensor

ford has problem with idle air control valve
try to start the car next time and keep your foot on the gas pedal lightly
if it does not cut off then that's the problem

Yes, if the gas pedal is stuck fullt down the Throttle Sensor located in the throttle body will note the throttle position and shut down the fuel injectors. If in the future your fuel injected car becomes flooded, hold the gas pedal down and turn the engine over this will help free the engine of too much fuel.

I hope this may have assisted you,
Tom

try unhooking the battery and cleaning the throttle body. Open it up and clean it with an old tooth brush and carb cleaner, now hook up the battery. crank it up, hold the throttle halfway down until it clears up and runs smooth. now slowly let off the gas and it may idle ok. If not you may need to take it to a shop and have th e"adaptives and the Idle Air" rest using a scanner.

Check the EGR operation. If this valve is leaking it will cause your symptoms.

You're Iac is sticking because of carbon build up. The usual fix is a new one.

what generally happens with jeeps. is the idle air control valve loses memory of its idle position. try starting the vehicle with your foot slightly on the gas pedal. if it starts your going to have to keep it running by keeping your foot on the gas until it relearns its position and runs by itself. also there is a possibility that one of the modules locked up. if my first suggestion doesnt work then disconnect the negative batt cable for 30 seconds reconnect and then try to start it