When i start the car, the idle is perfect.. when its warmed up its fine..

BUT whenever i slow down from driving to come to a stop, the idle stays up high until i completely stop, then it drops to normal after being stoped for a lil more than 5 seconds or so...

also if im coasting at around 40-60 mph, and then just let go of the gas without pressing the brake, it will slowly decelerate, but it will slow down to only about 25mph and then just coast there like if it was on cruise control...

I was thinking there was a vacume leak with the TB gasget or some other gasget that i didnt replace when i cleaned out the Intake manifold, btw, while i did that i also replaced all the vacum hoses (i checked them all and they are fine, non are loose or anything)

could there be any other things i can look at?

 

am also interested in the solution to this... my car does similar things... very annoying...

 

What is your idle in neutal?

 

I'll stay in the background for now don't want to hijack XeroX's thread!...

 

in nuetral its about 700-800 RPMS...same in park, and same in drive.. it used to fluctuate but then i reset the ECU and its settled all around now..