Dumb question or not?
Thread Starter
Registered User
Joined: Feb 2000
Posts: 122
From: Valdosta, GA
Dumb question or not?
Dumb question or not either way I dont know.
I have a '93Z w/M6 and when Im coasting to a stop with the car out of gear I notice that the RPM's stay a couple hundred RPM's higher then idle. When I come to a stop it comes down to the normal idle. Why does it do that? The car runs fine and there is nothing wrong with it. Just wondering what causes this. Thanks for your help.
Matt
I have a '93Z w/M6 and when Im coasting to a stop with the car out of gear I notice that the RPM's stay a couple hundred RPM's higher then idle. When I come to a stop it comes down to the normal idle. Why does it do that? The car runs fine and there is nothing wrong with it. Just wondering what causes this. Thanks for your help.
Matt
Registered User
Joined: Mar 2001
Posts: 165
From: arvada, colorado, USA
Originally posted by Dave88LX
No such thing as a dumb question, only stupid answers.
Unfortunately, I don't have the right one for you.
No such thing as a dumb question, only stupid answers.
Unfortunately, I don't have the right one for you.
yeah, no i was wondering the same thing. put in neutral on the highway and the rpms drop but not down to idle (1000). goes to like 2200 or something.
shouldnt it drop all the way down if the car is in neutral?
Registered User
Joined: Apr 2003
Posts: 2,628
From: Pgh, PA
Mine does the same thing, I donno why though. It will come down to like 1000, just a hiar above idle. Then if i stop, and push in the clutch to shift into 1st or whatever, it drops to where it should Idle, and its fine. Always has done this, think it is a normal thing ...
Registered User
Joined: Dec 2001
Posts: 41
From: Baumholder, Germany
mine does the same thing and I'm pretty sure the computer controls the RPMs based on the speed of the vehicle. I've noticed mine drops straight down to the computer programmed 850 rpm when I come to a hault at a red light.
Thread Starter
Registered User
Joined: Feb 2000
Posts: 122
From: Valdosta, GA
I have no doubt that its normal. The vaccum thing sounds good and makes sence seeing as how the brakes would still be needed. Does anyone know for sure with facts to back it up? Not knowing has been bugging me for years. Than guys for shedding some light on this for me.
Dave, surely yoju could have thought of some stupid answer...
Dave, surely yoju could have thought of some stupid answer...
Registered User
Joined: Mar 2001
Posts: 165
From: arvada, colorado, USA
yeah i agree, i am 99.9% sure that it is normal.
but what component needs vacuum at like 1500-2100 rpm? the STRONGEST vacuum occurs at DEceleration and idle. if it went back down to 1000 rpm the vacuum signal would be very similar.
but what component needs vacuum at like 1500-2100 rpm? the STRONGEST vacuum occurs at DEceleration and idle. if it went back down to 1000 rpm the vacuum signal would be very similar.
Thread
Thread Starter
Forum
Replies
Last Post
dbusch22
Forced Induction
6
Oct 31, 2016 11:09 AM
95z_28_camaro_4_Ivan
General 1967-2002 F-Body Tech
2
Dec 19, 2014 08:48 PM
Hurin
Suspension, Chassis, and Brakes
4
Dec 13, 2014 07:38 PM
donot_4get
Drag Racing Technique
5
Sep 14, 2002 08:03 AM