Toyota Innova Fuel Consumption

For city driving in Metro Manila, horrible stop and go traffic even on EDSA Toyota Innova' fuel consumption is around 8 kilometers per liter, with my relaxed driving style and easy on the gas, stay on my lane but my Innova is realy new thus still under 'break in period.'

1. Isuzu Crosswind Fuel Consumption
2. Toyota Innova 2015 Fuel Consumption

Isuzu Crosswind Fuel Consumption

• The car has been praised for its drivability. Given the size of the vehicle, the Toyota Innova has considerable power and is known for its maneuverability. Its suspension handles large occupancies well, regardless of distribution. Toyota Innova Fuel Consumption. Considering the size of the vehicle, the Toyota Innova is surprisingly fuel efficient.
• Toyota Innova Technical Specs, Fuel consumption, Dimensions, Power, Maximum speed, Torque, Acceleration 0 - 100 km/h, Engine displacement, Drive wheel, Tire size.

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I think my car is consuming much more fuel than it should, I've compared it to other versions of the same model which have more powerful engines and mine seems to be on the higher end when is supposed to have the most economic engine of all. I have a Toyota Altezza (which is exactly the same as the Lexus IS200), it comes with a 1G-FE engine, which should be more economic than the 3S-GE and the 2JZ engines.

Toyota Innova 2015 Fuel Consumption

Things I've done so far:

1. Cleaned the air filter (the air filter is a cleanable one, not just dedusting a replaceable filter)
2. Replaced the spark plugs (got the original Iridium replacement part)
3. I have the original wheels and use the tires sizing and air-pressure specified by the manufacturer 215/45/17 @ 34 pounds (2.3).
4. All my engine indicators on the dashboard are off and the BSOD check showed no error code (they all turn on when I engage the switch).
5. I don't (usually) drive at high-accelerations/high-speeds.

I'd like to know what else can I check on my engine that might lead to a poor fuel efficiency.

Note: some time ago I had my engine serviced and they left the air sensor that goes after the intake filter unplugged and this didn't turn the check-engine indicator on, I didn't give it a BSOD check during the time the sensor was disconnected though.

Update 1

I'm getting around 22 MPG when I should be getting around 35... the 2JZ which is the most fuel-hungry version has 20-25 (in cars with similar mileage), I got the car like 6 months ago and is always been like that, the previous owner and the mechanics I took it to said the engine hasn't been mod (and knowing a bit on the subject as well, I think so too). The Altezza is produced for the Japanese Market (with high standards though) so all the average consumption I've inferred on how much all the other stock cars in my team consume.

6 Answers

I think you are right on track. Taking a look a Fuelly there are 5 other Altezza owners and they all seem to be getting about the same MPG as you do:http://www.fuelly.com/car/toyota/altezza

How much worse is the fuel usage you are experiencing? Have you talked to any other owners to see if you are getting way below their mileage? How did your last car perform compared to listed fuel mileage ratings?

In the U.S., the government posts the results of required fuel mileage tests. Most of the people I have talked to do not get the same fuel mileage as the test cars do. Some say the city mileage is worse than expected, and some say the highway mileage is better. Of course, this is anecdotal evidence, because no one drives the exact same way everyday. In addition, the government tests are performed under laboratory conditions, while for individuals there are many other variables, such as: the weight of the car (1/4 of a tank of fuel vs. a full tank), traffic, how long you idled at a red light, how many hills you climb, etc. The best you can get is a long term average.

In my area we use an ethanol blended gasoline. On a recent trip I noticed a 10% increase in mileage when the fuel I purchased was not an ethanol blend. While all the things that you have checked will have an effect on fuel usage, the biggest influence is the driver.

I'm not really familiar with your car, specifically, but I'm ready to speculate based on general knowledge of fuel injection.

Electronic Fuel Injection or EFI uses 'closed loop air/fuel ratio control'. What this means is that it has a way to 'see' how completely the oxygen has been used up by the fuel delivered. If there's too much fuel, there will be no oxygen left. The car's computer then reduces the amount of fuel used until it sees too much oxygen in the exhaust, and increases fuel again.

The sensor used to do this is the oxygen sensor, or O2 sensor. Though the check engine light should come on if this sensor isn't giving good enough feedback, it might be worth measuring its output. The best way to do this is with a graphing voltmeter which can show a plot of the sensor's voltage.

Once the car is warmed up the o2 sensor voltage should oscillate maybe 30-60x per second, passing through 0.5v. If you just have a multimeter with a digital display, you would look to see around 0.5v constant DC. Steady 1v or 0v indicates a problem either with the sensor or with fuel delivery... but it's a place to start. The sensor will have a few wires on it, and the relevant signal is usually on the black one. YMMV, it might be worth looking at a wiring diagram to be sure.

It's interesting that leaving the airflow sensor disconnected did not trigger a check engine light, too. That sensor is also responsible for giving the computer a baseline fuel quantity before it's adjusted by oxygen sensor feedback. Almost every car I've ever touched will throw a code and illuminate the check engine light if this sensor is disconnected.

I wonder if the car's ECU has been modified by a previous owner. Is this a possibility? Has someone 'chip tuned' it and F'd it up? Chip tuners frequently attempt to change the fuel table referenced by the airflow sensor's input.

Lastly, I have found that re-usable air filters typically require that they are oiled lightly to catch small particles of dust. If any of this oil ends up on the element of the airflow sensor it can make it report the air mass incorrectly, which can affect fuel consumption. There are cleaners available for the MAF, you could try that out.

Apparently there's one more thing you can check to see if you're engine is consuming too much, and that is the composition of the exhaust gas. I took my engine to a dyno before swapping it for a 2JZ ('cuz hey, if I'm gonna the 2JZ mileage anyways, might as well get power) and they told me the engine was getting more fuel than it should.

Apparently the engine fuel intake regulator wasn't regulating properly but still 'working' so no engine issue was detected.

I would still recommend to go through the steps in the original question, and if that all fails then take it to the dyno and measure the air/fuel ratio through the exhaust gasses.

Good day I am from Trinidad and own an Altezza with a 1G- FE engine. I couldn't help but notice you mentioned that you washed your air filter. I previously used a K&N air filter in it and purchased a regular replaceable Sakura air filter for it . The Sakura was supposed to be used for periods when the K & N needed to be cleaned since proper drying is necessary for proper and safe function of the k & n . Anyway, when I did start this practice of using the sakura, I realised a significant increase in fuel economy. Personally, without any research being done, I believe this is as a result of the k&n filter having a thinner filter media which allows more air into the intake manifold which causes the brain to increase the amount of fuel it sends to the engine to compensate for the increase in air. This is my personal experience and may be subject to correction but it happened with me . I hope it may have helped.

Regards

For ordinary street driving, poor mileage almost always boils down to two particular components. Each of them has five toes.

Driving is very ego-based, so a scoldy exposition of what one might be doing 'wrong' would be totally unproductive. Instead I'd refer you to the unique craft of hypermiling, scientifically altering normal driving habits to maximize MPG. Even if you don't want to spend your life driving slow, knowing all aspects of the craft means you only waste fuel or brake disc when you choose to.

I thought I caught a hint (the word 'team') that you might be doing this in a racing context. there, you are forced into a very narrow pattern of driving, and are unable to waste fuel. It's thermodynamically impossible for a fleet of the same car running the same course with halfway competent drivers getting not-comically-different lap times, to get more than maybe 5-10% different fuel economy tops. 30%? Impossible. Either you are comparing apples and oranges, or the driver is running the A/C lol, or I'd be real interested to see Infrared-camera images of each of the cars going by, because there'd have to be like a 10kw hotspot on one of them!

protected by Community♦Dec 11 '18 at 21:13

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