odd question i know, but not sure where to look this one up. in many vehicles when engine breaking over a longer distance (such as down a hill) the ECU will simply cut out the injectors to save fuel. the forward momentum is used to keep the engine turning and everything working. very useful down a large hill, just gear down and you use zero fuel to get to the bottom.

not sure of accents have this feature or not - some refer to it as DFCO. its a 2004 accent for those interested, 1.6L DOHC.

for anyone wondering engine breaking is when you gear down to increase your rpm's without the accelerator to use the engine momentum to slow down. oh and i'm driving a manual too.

 

All modern cars do that.

 

If I'm reading the cells correctly;

* Anytime the VSS shows road speed above 30 mph and
* The engine RPM is above 2,000 and
* The TPS then shows throttle closed

The ECM will command the injectors to cut fuel flow until:

*The TPS shows throttle opening above idle or
* Engine RPM's drop below 1500 or
* VSS shows road speed at or close to 0 mph.

(This is true for most OBD-II vehicles).

 

thanks for the replies guys, appreciate it