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RPMs bounce when I put in neutral while coasting...

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Old 03-11-2005, 03:48 PM
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Default RPMs bounce when I put in neutral while coasting...

Noticed something strange yesterday. If I am just cruising down the road (didnt really seem to matter how fast as long as its over like 15mph) and I take it outta gear and just let it sit in neutral, my tach bounces from like 800rpm to 1300rpm. It just sits there bouncing if Im coasting - anybody else have this happen? It doesnt do it if you are going real slow or just sitting still idling though. Weird stuff...
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Old 03-11-2005, 03:55 PM
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happens to me too - wouldnt be that worried theres madd computers determining both idle and cruising rpms
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Old 03-11-2005, 03:56 PM
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is the engine still cold when ur doing it...I dont know where but someone told me not to put an auto car in neutral while driving...this really is not a problem though
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Old 03-11-2005, 04:24 PM
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Im not to worried about it, just though it was a little strange. My car is a manual BTW, not an auto.
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Old 03-11-2005, 04:29 PM
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Hmmm never noticed that. I will try it and see if it does it on mine. Mine is Manual aswell. I will let you know.
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Old 03-11-2005, 06:07 PM
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i noticed my 5speed did that the other day too. it doesn't do it all the time tho.
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Old 03-11-2005, 06:15 PM
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1) You should not take your car out of gear to coast. It's a safety concern and it is illegal in some states (Although not enforceable, it was made illegal for a reason).

2) My mx-6 does the same thing, just not quite as much. The car's ECU is probably trying to find the optimal RPM, slowly going down, to the point where it needs to go up a bit to prevent from stalling. Not sure on that and I'm not an educated opinion, however it makes sense.. but in any case, you shouldn't worry about such things!
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Old 03-12-2005, 02:33 AM
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Ive always drivin manual. Ive never heard of it being bad for the vehicle, or illegal for that matter. How could it be bad?

You mentioned saftey concerns. What are the saftey risks of neutral coasting exactly? Thats a new one on me.

thanx
-Rolled
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Old 03-12-2005, 02:35 AM
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^agree... its just like letting off the gas in a Auto. seriously. i did it all the time in my BMW and that NEVER happend.
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Old 03-12-2005, 02:56 AM
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aren't all car like this?
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Old 03-12-2005, 03:06 AM
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someone told me that putting it in neutral while coasting for an automatic transmission is bad because when you put it in neutral the tranmission fluid doesnt move around and lube the gears. I dont know how valid that statement is though because it doesnt really make sense to me.
edit: after i think about it, it must be true because tow truck drivers usually dont tow cars with the drive wheels on the ground. they say it will fry the transmission
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Old 03-12-2005, 03:47 AM
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you should never changed to Neutral and coast in a AUTO...but its perfectly fine in a Manual
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Old 03-13-2005, 04:37 AM
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It was made illegal to coast in neutral because if a car were to rear end you, you'd go flying forward, whereas in gear it might help, at least a little, to slow you down since the engine is loaded
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Old 03-13-2005, 05:03 AM
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I never had that problem in my mx 6...but mine was a 92 before the body style change and the v6 engine. never had trhat happen in my tc. maybe u got a ____ty one.
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Old 03-13-2005, 06:08 AM
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it's illegal becuase it may cause you to delay moving out of the way of an emergency vehicle....if one is speeding up behind you it will take longer to put the car back into gear and move out of the way than if you were down shifting to a stop.
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Old 03-13-2005, 08:20 AM
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thats recockulous. how are they going to enforce this. So it must be illegal to be in neutral when Im at a stop light too?
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Old 03-13-2005, 10:10 AM
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Yes. There are special cameras in the stop light monitoring your gear-shifts.

I don't know how they enforce laws like this.
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Old 03-13-2005, 12:22 PM
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I don't think they ever intended it to be enforcable....just something that they can tell you not to do cuz the gov't loves to do that
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Old 03-13-2005, 03:04 PM
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Originally Posted by Priory of Scion
I never had that problem in my mx 6...but mine was a 92 before the body style change and the v6 engine. never had trhat happen in my tc. maybe u got a ____ty one.
Well it only happens sometime - not all the time. Id say it is fine more times than not... it was just something I noticed. I dont really care all that much. As for the legal issue - they can never enforce it. Is there a list of states where this is supposedly illegal anyways? Sounds like bull____ to me.
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Old 03-13-2005, 04:13 PM
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wow...that much of a difference 800 to 1300, mine only like from 700 to 900 at most
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