Hang Time: Exploiting ECU Fuel Maps for Fuel Efficiency - Page 2 - Toyota Yaris Forums

Sedan · 03-15-2013, 05:42 AM

Quote:

Originally Posted by libra23

Hello Friends!
i have a problem, can you solve this?
I want to know the specs of my Yaris, since I am not sure if my engine is VVT/VVT-i or VTEC/VTEC-E .. is there anywhere I can see my car specs? I bought it new in Jan 2010 if that helps...

Toyota has VVT-i technology. Only type of Yaris not having VVT-i are the ones that can be run on leaded petrol. But I dont suppose you get leaded petrol in the US. Check the owners manual. It should be there. You also might see a sticky on the fuel tank cap reading "Unleaded fuel only". (Not sure if this is pasted in your country, but it is there in my Yaris)

ardvark2175 · 10-29-2013, 04:09 AM

Bought a 2012 Yaris LE automatic. I was pretty much getting the advertised fuel economy of 32 / 35. The following service was done to the vehicle. 50 miles at purchase, installed K&N washable air filter. 500 miles, oil change standard Valvoline 5w30. 2500 miles, oil change with standard Valvoline 5w30. 5000 miles, oil change with Semi synthetic Valvoline 5W30, cleaned air filter. 10000 miles oil chance with full synthetic Valvoline 5W30, transmission flush with AMSOIL Signature Series Fuel-Efficient Synthetic Automatic Transmission Fluid. Immediately after going full synthetic I gained 5 mpg. I get 40 mpg regularly now driving the same 180 mile route driving 60 and 65.

dj92 · 11-13-2013, 08:11 AM

I think this trick is based on the acceleration enrichment.
It's used to let the engine pull stronger when you want to accelerate, and by releasing the pedal a bit, the ECU stops this enrichment which results in a better MPG.
It did not really work for me, shifting to the 5th gear from 18MPH on improved my in-town MPG this morning from 47 to 49.
However, my record on a level road outside the city was 58 :)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fuel Efficiency and the Yaris	BailOut	Fuel Economy Forum	325	05-12-2024 01:43 AM

10-29-2013, 04:09 AM	#2
ardvark2175 ardvark Drives: 2012 Yaris LE Join Date: Aug 2012 Location: Missouri Posts: 14	Bought a 2012 Yaris LE automatic. I was pretty much getting the advertised fuel economy of 32 / 35. The following service was done to the vehicle. 50 miles at purchase, installed K&N washable air filter. 500 miles, oil change standard Valvoline 5w30. 2500 miles, oil change with standard Valvoline 5w30. 5000 miles, oil change with Semi synthetic Valvoline 5W30, cleaned air filter. 10000 miles oil chance with full synthetic Valvoline 5W30, transmission flush with AMSOIL Signature Series Fuel-Efficient Synthetic Automatic Transmission Fluid. Immediately after going full synthetic I gained 5 mpg. I get 40 mpg regularly now driving the same 180 mile route driving 60 and 65.

11-13-2013, 08:11 AM	#3
dj92 Embracing Curves View User's Garage Drives: '14 Prius Executive Join Date: Aug 2013 Location: mid-western Germany Posts: 256	I think this trick is based on the acceleration enrichment. It's used to let the engine pull stronger when you want to accelerate, and by releasing the pedal a bit, the ECU stops this enrichment which results in a better MPG. It did not really work for me, shifting to the 5th gear from 18MPH on improved my in-town MPG this morning from 47 to 49. However, my record on a level road outside the city was 58 :)