I have an automatic and when I drive really slowly with the "D", the rpm seems to hang when the car shifts. I think it goes up to around 4000 rpm before it shifts. It doesn't shift right away either. It seems to be stuck on 4000rpm for like a second and then changes. Is there something wrong with the car? My 2000 Honda Accord didn't do that.

So now, I try to use the manual mode as much as possible. I can shift around 2000~3000 rpm and it'll shift right away if the speed is right.

Does anyone else experience this?

 

yes, the car "hangs" at RPM to cut back on emissions/fuel. Gotta love VVEL and Rev-matching

 

sounds like downshift rev matching?

 

How about an explanation of what rev-matching is all about, anyone?

 

VVEL? did someone time warp and have that installed in the sedan? doesn't exist yet.

 

this is not rev-matching. the rev-matching feature is for downshifts. the OP is talking about upshifts. i, too, have noticed this phenomenon and it's more than average for an AT car.

it is indeed for emissions reasons. it's intentional DBW and ECM programming to reduce NOx emissions, and it works. on manual cars, this is augmented through the IAC Valve.

 

yeah, got a bit ahead of myself. was reading an article about it while i was surfing driver, and i didnt notice the mistake at work

 

Doesn't higher rpm mean more gas consumption though?

Well, I'm glad it's not a bad thing.

 

not on its own, no.... and not necessarily anyway (even with throttle).

first of all, overrev is what we are talking about here... low load condition, so any overrev is not caused by a lot of fuel being dumped.

second, even when "on the gas" high RPM does not automatically mean high fuel consumption, because your throttle position for the same torque output at a higher RPM is usually lower. you want to balance torque output with throttle position and fuel being dumped. think of it as a near-bell curve. very low RPM + high throttle position == low mileage. very high RPM with moderate throttle position (needed to overcome frictional losses) == low mileage also. somewhere in the middle is the most fuel-efficient solution.