Re: RPM'S jump when clutch is pushed????? (OC98Golf4dr)
On the early OBD1 cars(93-some 95s) there is a feature bolted into the top of the throttlebody that allows this to happen exactly for reasons already mentioned, to completely burn the fuel. It's basically a little damper. They unbolt quite easily, problem solved. Not sure about newer cars with OBD2, though, I don't recognize anything on the tb that looks like it would do the same job, in these cases it's probably a matter of software.