I have an '05 Toyota Corolla with a manual transmission. When the car is cold and I step on the clutch, the engine revs (RPMs jump to 2300). It only happens when the car is cold. Why is this happening?
You`re relieving a load from the engine when the cold start warm up (high idle) is in motion.
I recently test drove and bought a 2004 Matrix XR, and when I first started the engine (It is cold here) I watched the rpm gauge run up to 22-2300 rpms and questioned the tech I had been taking with, and he said all the Toyotas seem to do this (by design) for a fast warm up.
Reason being they believe a warm engine runs better and with less emissions. No doubt there.
My `00 Silhouette van V6 revs higher than idle (on a cold start) too, but only goes to 1500 then drops back down to 750 within a few seconds.
It warmed up to operating temp quickly though.
I`m not tuned to the idea of a very fast COLD start up.
BUT, who are we to argue with highly trained and schooled engineers who design these engines.