iratic idle on deceleration - Maintenance and Repair Forum

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iratic idle on deceleration
Tuesday, August 29, 2006 10:12 AM
Ok I have a problem with my car jumping the idle from about 450-2000 RPM when decelerating. Could it be the map sensor doing this? seems kinda like a vaccum leak.



2009 Ford Mustang V6

Re: iratic idle on deceleration
Tuesday, August 29, 2006 10:53 AM
Automatic transmission? Does it jump around or go up and progressively drop over and over again. Just asking could be a locked up torque converter sticking.


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'96 Cavalier Good ol' Pushrod 2.2
-24X,000 miles on factory build
-Some oil loss between changes, me thinks it be rings.
Re: iratic idle on deceleration
Tuesday, August 29, 2006 12:24 PM
It's not the torque converter doing it. it does it even in I drive it in low 1 and low 2 on decel it will constantly bounce from 450-2000 until I stop the car then it idles fine.



2009 Ford Mustang V6
Re: iratic idle on deceleration
Tuesday, August 29, 2006 2:00 PM
If you doing even 20 in low decelerating the tach shouldn't be reading anywhere near 450rpm. does it feel bad or just read that?


--------------------------------------------------
'96 Cavalier Good ol' Pushrod 2.2
-24X,000 miles on factory build
-Some oil loss between changes, me thinks it be rings.
Re: iratic idle on deceleration
Tuesday, August 29, 2006 5:54 PM
It drops down to it like it's goin down to idle but then jumps back up.



2009 Ford Mustang V6
Re: iratic idle on deceleration
Tuesday, August 29, 2006 7:59 PM
If you feel it lessen on the engine braking then gain it again when the tach drops then your transmission needs work. If you don't feel a difference but the tach falls it's electrical.


--------------------------------------------------
'96 Cavalier Good ol' Pushrod 2.2
-24X,000 miles on factory build
-Some oil loss between changes, me thinks it be rings.
Re: iratic idle on deceleration
Wednesday, August 30, 2006 4:16 PM
David Jones wrote:Automatic transmission? Does it jump around or go up and progressively drop over and over again. Just asking could be a locked up torque converter sticking.


I have an 2000 Auto and it's done that jumping when decelerating now and then. Is it normal? Is there a fix?




Ryan1



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