RPM in neutral

I tried a little search and this topic but if I did read the answer, it must have gone right over my head.
My v6 6-spd idles at around 700~800 ish. if i put the gear in neutral (or step on clutch) while curising (say I see a red light ahead so instead of leaving in gear i'd jut slip into neutral and coast to the light), the RPM doesn't go any lower than 1100~ 1200 ish until i almost come to a complete stop. this does not make sense to me mechnically. For example, my old honda would drop its RPM down to idle within a second or two if i did the same. why is this? is it because of the computer and if so why?

 

Your throttle body is computer controlled, and that behavior is designed in. They all do it. Supposedly it is for emmissions.

 

What have done to your engine lately? Throttle body cleaning or MAF sensor cleaning?

I ask because I cleaned my throttle body and afterwards it drove very oddly, idled high and always felt like it was lunging, even when braking. Then I heard I needed to disconnect the battery for 10-15 minutes to let the computer reset. After that it drove perfectly.

 

Thanks Badger. Computer was what i expected to hear but couldn't imagine why.

Photonashville, the truck came this way when i bought it. i wasn't sure if this was normal with all Tacos or was just mine. It doesn't lunge or anything, just the RPM wouldn't drop as low as I expected it to.

 

Just now I noticed the threads on coasting in neutral and how it doens't save gas as one would expect. So this tells me that it doens't matter that my RPM doesn't drop as low as I expect it to because i am not saving any gas in neutral anyway. If anything i am using more gas. it is amazing how much is computer regulated nowadays.

 

I think my 6 speed does that too, but I'll have to actually pay attention to it to make sure. The only reason I can see would be to have the RPMs slightly higher than idle in case you do put it back into gear and the gear is too low for how fast you are going. Higher RPM makes engaging the clutch smoother and reduces jerk?

 

Actually it makes shifting harder for people used to conventional throttles. There are many discussions about it that can be searched up under throttle hang and RPM hang. One company has a black box that eliminates the lag in response, but last time I checked they didn't have one for the 6 speed yet.

 

one thing is certain in my mind now...when the aleins come to attack with their electromagnetic ray guns, I will have a better chance of making it far on a bicycle than my truck whose computers are going to go kaka

 

Great, we don't need to wait for aliens to mess with the computers. Boeing is already working on it.
http://www.smartplanet.com/blog/bulletin/meet-the-missile-that-wipes-out-everything-electric/3650

 

I have a brand new 2012 that does this. My old ford ranger used to do it too. It annoys the hell out of me. Whenever a mod becomes available to delete it I'm going to be all over it.