- Apr 14, 2015
- 11
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My 4.6 2002 GT when I let off of the gas pedal, the engine slowly returns to idle. It does this even when I am shifting gears. Is this normal for the injection system to do this? This is my first injected car. I do not know if a larger throttle body has been installed. I know larger injectors were replaced with stock ones to pass Calif smog test. Or could it be a weak throttle return spring (I haven't dared to look yet). When I drive the car normally, it takes time for the engine to lower it's rev's before I shift. Any and all info is appreciated .