[AlmostStock]

On my 2005 Blazer 4.3 V-6 with 5 speed manual transmission it takes several seconds for the engine to return to the normal idle after the throttle is released while driving. This limits the engine braking effect somewhat and I find it annoying.

Because I have noticed this on many other computer controlled vehicles I believe it is a normal trait of some on board management systems and technically not a problem. My question is why do they do this and is there any way to make these FI pcm controlled engines deliver instant engine braking on throttle release like the old carburetors did? Thanks.