Civinfo - View Single Post - MPG Fuel consumption skyrockets momentarily when stopping

Skaven252 · 14th November 2006, 07:41

There's this one thing I've been wondering about for a while. I approach red traffic lights at 40 km/h and switch to 2nd gear to engine brake a little. When the speed has dropped enough I press the clutch (to prevent the RPM from going too low and stalling the engine) and let the car glide into position. Almost every time I do this, the fuel consumption graph suddenly jumps over the top after the clutch is pressed, hogging something like 30 l / 100 km for a couple of seconds, then drops down to normal idle consumption. However, the RPM gauge doesn't jump up, nor I hear anything special.

Why does this happen?

Is it normal? Is it maybe just a glitch in the fuel usage meter?

14th November 2006, 07:41	#1 (permalink)
Skaven252 Triangular Exhaust Join Date: 1st June 2006 Location: Espoo, Finland Posts: 247 Thanks: 1 Thanked 0 Times in 0 Posts	Fuel consumption skyrockets momentarily when stopping There's this one thing I've been wondering about for a while. I approach red traffic lights at 40 km/h and switch to 2nd gear to engine brake a little. When the speed has dropped enough I press the clutch (to prevent the RPM from going too low and stalling the engine) and let the car glide into position. Almost every time I do this, the fuel consumption graph suddenly jumps over the top after the clutch is pressed, hogging something like 30 l / 100 km for a couple of seconds, then drops down to normal idle consumption. However, the RPM gauge doesn't jump up, nor I hear anything special. Why does this happen? Is it normal? Is it maybe just a glitch in the fuel usage meter? Last edited by Skaven252; 14th November 2006 at 09:45.