Hello, about 3 weeks ago my engine start to do something strange! i need your knowledge to find what is the source of my problem... it begin when the engine is warm and i use full power from it, i explain one of the circumstance the problem happen; like 1,2,3 shift at 8200 rpm comes approx 145kmh and after i want to slow down because there is traffic in front, so i release the gas pedal and start to push break, put the engine wont stop it stick at 2500rpm,(like the choke when its cold outside and the engine is cold) even if i down shift in 2 gear the engine wont compress it actually accelerate, maybe its the gas pedal or the gas cable that stick somewhere, i find a way to stop my problem, i kick 1 or to time very fast the gas pedal and its return back to normal at 1000 rpm. put as soon as i start again to use the gas pedal the problem come back put the method of kicking 1 or 2 time work again! somebody told me that this was because i use 91 octane instead of 94 but i have this engine for about 1 year and always using 91 and that problem only have 3 week lol If somebody have an idea ill take it !!, anyway i will change the gas cable this weekend i tell you back if that solve my problem or not!
Thanks

 

That was kind of hard to read, but it sounds like either the throttle cable or throttle body is sticking.

 

could be your throttle body spring...