Bouncing idle

[JAZ32*PD*]

For the past couple weeks ive noticed that if im driving 40+ mph and i throw it into neutral the idle it bounces from 300rpm-1100rpm until i come to a complete stop, then it maintains proper idle, i havent noticed any problems in performance or mechanical it is just wierd why it is doing this, it seems like a vacuum problem but not certain, I was just wondering if anyone has had the same problem or kno what it is???


[Street Racing portion removed.]

(squinty)

 

[Mistersix]

hmmm. thats crazy stuff. i've never put the car in neutral when rolling at highway speed. i'm gonna try it and see it my idle bounces.

mods?

 

[JAZ32*PD*]

mods?

All i have is COBB SRI, Forge BPV, & NRG grounding kit

 

[Mistersix]

i have not got to try it yet since my cars been on jackstands. still installing my dp.

 

[zinger002]

my car does this if i vent my bov. and that loss of metered air at idle causes it for me. not waying its your problem.