I just bought a MY07 WRX and live on the equator, i.e. never cold weather (daily ~30C average).
In the morning, when I start my engine, its idling rpm is around 1500~1600 in neutral gear. However, after a few minutes of driving, the idling rpm drops to around 700 in neutral. Is the high rpm at start normal? I try to let the engine warm up without stepping on the throttle till it drops to around 1250 rpm (takes a couple of minute) before I start driving. Is this pointless?
Also, there are times when driving and I want to accelerate, I floor the throttle and the engine then "chokes", i.e. it stops firing for a fraction of a second a few times, till I instinctively ease off on the throttle and it fires smoothly then. Can happen from gear 2 up to 5. Am I doing something wrong, e.g. pumping in too much air till ignition does not take place, or is it just my spark plugs need replacement, just too foot heavy or something like that?
Note I use 97~98 octane gas and I also try to remember to let the engine warm down for a minute in neutral after I park before I switch off the engine. I don't have a turbo timer, just using the countdown timer on my Android cell phone Gives me a chance to check for any messages that came in while I was driving, or look busy doing that, rather than staring into empty space like a nut ;P Is there something I need to check or just some bad driving habit I need to change?
Any suggestions are welcome.