Delay when letting go of throttle of car?

[Edgar R. Zakarian]

So I'm driving a Daewoo Nubira 1.6 2002 Petrol. Manual/stick gear

When releasing the throttle there is about 1-1.5 second delay before the engine actually reacts to it.

You can feel it if you run about 80km/h /50mph? - in third gear at about 4000 rpm, then let go, it'll react after 1-1.5 seoncds..
I've tested it also by releasing the throttle then instantly pressing the clutch. Sure enough RPM's start to drop after 1-1.5 seconds.

Before that the RPM's pretty much stay where they are.

 

So what gives? it makes it hard to time gear switches with RPM's if you wanna do it fast.

 

[Levent]

That sounds like rev hang (a "feature" added by manufacturer to reduce emissions)

[Bitter]

If the car has electronic throttle that's exactly what it is. If the car has cable throttle there could be something else awry.

[circeseye]

rev hang? um no and especially that year and its a stick
that sounds like your throttle is sticking slightly...might be gunked up at the throttle body

[Edgar R. Zakarian]

8 minutes ago, Bitter said:

If the car has electronic throttle that's exactly what it is. If the car has cable throttle there could be something else awry.

 

55 minutes ago, Levent said:

That sounds like rev hang (a "feature" added by manufacturer to reduce emissions)

I saw the video about rev hang here:

https://www.carthrottle.com/post/rev-hang-explained-and-why-petrolheads-hate-it/

 

Definitely not reacting as fast as this guys car. The revs stay constant for about a second, don't drop at all on mine. It's only after a second they start to drop.

6 minutes ago, circeseye said:

rev hang? um no and especially that year and its a stick
that sounds like your throttle is sticking slightly...might be gunked up at the throttle body

So basically try cleaning the throttle body? (the flipping lid thingy)

[circeseye]

yea...basically. all the moving parts. also check the throttle cable. (corrosion and such)....your year car doesnt have rev hang symptoms (those are newer cars hense why that page has a 2015 car video)