My wife has a 2007 Pontiac G5 Base model Coupe, and if you're driving down the highway at times with your foot almost half-way down on the gas pedal, it sticks. When this happens, I have to put my foot underneath the gas pedal to try and pry it from being stuck, or slight braking so that the gas pedal eventually pops back out..what causes that to happen? Would this be a common defect in other G5s?
Check the pivot point of the accelerator pedal and lubricate if possible. Check for freyed (broken) wires at the cable ends and check for kinks if you have a cable
SOURCE: Brake lights stick while driving but turn off when pressing brake
CHECK YOUR BRAKE LIGHT SWITCH THAT IS ON YOUR BRAKE PEDAL UNDER THE DASH
SOURCE: why does my gas pedal stick while driving. 1995
The throttle-body (or throttle plate inside the throttle-body) is probably gunked-up with carbon deposits and needs a good cleaning.
Take the air snorkel off of the throttle body and look inside while holding the throttle plate open. If you have thick black deposits on the back side of the throttle plate, you can clean it by spraying some throttle body cleaner (Available at any parts store) onto a rag and using an old tooth brush to push the rag, clean all the black gunk out of the area.
I recommend an old tooth brush because using something hard like a screwdriver can scratch the inside of the aluminum throttle body and actually make the throttle stick worse. I don't recommend spraying the throttle body cleaner directly into the throttle body because it can end up in the air plenum where it may loosen some deposits that can cause severe engine damage.
SOURCE: Renault laguna 1999 1.9TDi When I put my foot
probable cause would be a blocked E.G.R valve you will need to clean it but be carefull they break easy.
SOURCE: clutch pedal sticks to the floor; the brake reservoir was low
We had the same problem with ours. Its the clutch master cylinder.
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