Originally Posted by MaDD-Myke

no mods on the car except for exhaust and CAI...stock fuel pump and injectors...i don't know wats wrong,something just doesn't feel right with it...

Originally Posted by ImEv0

rev hang goes something like this:
-idling at a light, you tap your gas (gently) and the rpm shoots up to like 3k and it's just hanging at 3k or coming down very slowly (3k is just an example, it can be whatever).

-it can also happen when you're driving. let's say you're cruising on the freeway doing 70mph in 5th gear. you let off the gas and instead of cutting fuel, the car will still shoot fuel in the engine. two ways of checking this. one is by looking at your mpg estimator. when you let off the gas, it should go all the way up to like 75mpg (whatever the top is) but instead it'll be stuck at 50mpg or 70mpg. two, if you have a a/f gauge and you let off throttle, it should read "---" instead it'll show something between 12-13 afr. the third method is by feel. not everybody is keen on this but i can def tell when my car is hanging the rev.

Originally Posted by Napalm_Enema

I notice the EVO I have, new, doesn't rev 'fast', so when I rev it, and let off the gas, it takes a while to spool down. I assumed it was normal, but my STi will rev much faster and settle back down faster as well.

Originally Posted by ImEv0

that's rev hang.

when i first revved my engine at a light, i was dumbfounded to see my rpm "stuck" at 3k. it stayed at 3k for a good 5-8 seconds before coming down.

Originally Posted by Napalm_Enema

Solution for this? It's not that severe with mine, but I don't feel like 'revving' at a light because it sounds funny and just kind of drones down slooooooowly.