Hy, some timesafter i stop in a traffic light, the car start hestate or delay, even when applaid "Full Throttle" gas pedal. rare time happens when the car are running in normal speed (e.g. 45). the last time the engine turn-off in the middle of the street. thanks in advanced.
You should take it to a mechanic to diagnose the problem, because there are 10+ things that could cause your car to have these symptoms...They all range from the fuel delivery to a bad transmission. i hope you find out the problem.
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It could be the Electronic Stability Control (ESC) is inappropriately kicking in. Another possibility is the throttle position sensor. In any case, have it checked out soon so you don't ending up stopping with traffic behind/across that isn't going to stop!
try cleaning the throttle body right where this flap is carbon will build up and not let it close properly and that's telling the car the throttle is pressed its cheap to clean just get some throttle body cleaner spray it down and wipe good with a rag
Believe it or not pumping the fuel pedal is no help. This is a fuel injection system not the old carburetor type. the throttle position sensor is a sensor to tell the computer were the fuel pedal is at it is sensing how much you are pushing it to send fuel to the throttle body.
does sound like you have a leak down problem after sitting a while you may still have a fuel pump concern
It may be the cruise control cable - I had a vehicle do this to me before. The engine raced as soon as I started it, even in park. A couple of times, it stopped racing - then I pressed the gas pedal, and the RPMs did not drop when I released the pedal. If it acts somewhat like that, check under the hood and find the cruise control system - it is most likely a 3-4" diameter, 5-6" long cylinder-like object mounted on top of the engine with a long cable coming out of it going toward the back of the engine. Check all of the clips on the cable and make sure they are intact, then make sure the cable is fully attached to the throttle body at the end. My cable came loose and got itself wedged in the throttle body, preventing the throttle from closing. If the cable seems fine, check for other obstructions on the throttle body - there may be something else holding it. It may help to have somebody inside the car pressing and releasing the gas pedal (engine off), so you can see whether it fully opens and closes.