down shifting and not coasting

[pennystocks]

Bad news, the yaris doesn't "en-lean" when engine breaking. All the GMs i'v owned you could really feel it kick the fuel flow down when engine breaking. My aurora you could see then MPG increase when engine breaking, it auctually got less MPG when in neutral vs drive for coasting.

My scan gauge shows 0.2 Gallons Per Hour when costing in neutral for the Yaris. I did some engine breaking in 2nd and it was around 0.5 GPH. Also when you feel that slight engine break when coasting (you can slightly feel it kick in and out on my auto) is putting the PCM into open loop for a couple of seconds and the GPH is the same as in neutral. Also coasting it reads about 200-250 MPG and when downshifting it drops to 60-100.

I dont think there's a need for the yaris to enlean tho. I just did a trouble code test on a chicks car at work and her 2000 or so neon 4 banger showed 0.6 GPH at idle. I cant imagine what my aurora was at at idle. So thats round 5 hours for the car to idle out a gallon of gas. and 2 days to idle out a tank, not too shabby :)

So coasting in neutral is the best way in the yaris for MPG. BTW full throttle is around 6-7 GPH and normal driving is 1-3 ish and idle w/ the AC on is 0.3 and auctually shutting the car off while long coasting can add 1 or 2 MPG as long as its done on a normal basis. I have an auto so it kinda sucks to crank the starter 50 times a day. Just think of them as free miles that dotn cost you $$$ :)