Hey guys,
Just bought a 2012 Accord coupe with the 2.4L 5 speed. Love the car except that engine revs drop very slowly between shifts. Is the throttle by wire causing this and can anything be done to rectify it??
Thank you for a reply.

 

Take it back to the dealer & ask to test-drive other manual trans cars. I suspect that it's programmed that way for emmissions. (Tons of emmissions happen during over-run so they program the TB to bahave that way.)

 

Hey Jim
Thanks for the reply. Stopped over at the dealer today and spoke with a tech. He said the drive by wire throttle does that. Its made to bring drop revs slowly and aids in matching downshifts. I think thats crap. Anyone who can drive a stick should be able to blip the throttle and match speeds. More freedom taken away I guess.

 

I call BS. It's not for rev-matching like you said, because if you know how to shift you don't need that. Holding the RPMs up is marginally useful for a beginner who takes an extra second or 3 during a shift.

I really think it's to minimize unburned HC during over-run. Carburators and less-sophisticated injection systems (like 1985) produce an absolutely HUGE amount of emmissions during the few seconds when the throttle is completely closed and the actual RPM is coasting down. Even worse during engine-braking.

One easy way to avoid that by software, is to program the throttle to hang open then close slowly. In the old days they did that by adding a dashpot to the throttle linkage.

BTW, I hate the throttle-hanging "feature" too.

 

Thanks again Jim. Your reply sounds more like it. I guess I'm gonna have to live with it.