Questions tagged [fuel-consumption]

Use for questions related to fuel economy.

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Integrating Fast OBD Readings and GPS

I'm working on a project to look at fuel consumption on different roads and I need the OBD reader to log the GPS coordinates every time it takes a reading. I'm looking at instantaneous fuel ...
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Runing a lot of gas

I have a 2006 Dodge Durango 175,000 miles I had a fuel pump put in Feb of this year, but now I am burning a lot of gas. I have to fill up my truck every four days now. Before I could ride on a full ...
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What's the most efficient way to manually hold a specific speed?

I noticed that my new car is by activated cruise controll at lets say 50 km/h handling this speed by displaying an current consume of 1.8~2.4 l/100km, while when I'm trying to find the required ...
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Decreased MPG, clicking sound when pressing accelerator

Over the past week, the MPG on my car has gone down significantly, about 3-4 MPG. My driving habits have not changed. In the meantime, there is a distinct "pneumatic" clicking sound whenever I press ...
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Suspected slow leak in carb, mileage low only when time taken to consume fuel

I have a weird mileage issue in my CB Honda Hornet motorcycle. This is a version specific to India, https://auto.ndtv.com/honda-bikes/cb-hornet-160r It has a 160cc engine. During the first 1000 Kms, ...
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07 Camry Engine slow RPM and excessive fuel consumption reading

I have 2007 Camry manual made in Australia for Arabic gulf. The engine sometimes go to 500 rpm and suddenly stops. Or it also goes to 1500 rpm and doesn't return to 1000 rpm (which is the normal as ...
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2 votes
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117 views

Emissions per mile of high MPG lean-burn gas-powered cars versus standard gas-powered cars

I am wondering if there have been studies or calculations of the NOx emissions per mile of high MPG lean-burn gas-powered cars versus standard gas-powered cars. Honda made some great lean-burn cars ...
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2 votes
1 answer
106 views

Wheel covers for '95 Honda Civic EG with drum brakes

I have a 1995 Honda Civic hatchback with drum brakes. I am thinking of adding wheel covers (also called moon disks). Would this affect the drum brakes the same way it can sometimes affect disk ...
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Rav4 2015 Limited Edition high fuel consumption

I bought a Toyota Rav4 AWD 2015 Limited edition since 1 month and it's consuming a lot of fuel: about 17L/100Km in the city which is a high number for 4 cylinder SUV no? What could be the issue?
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1 vote
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125 views

Why Long Term Fuel Trims Remains in Negative?

Dear Experts here im attaching log of 1SZ-FE, 1.0L engine for your kind consideration, please advice why my LTFT remains in -ive though MAF, Intake Air Temp sensor, ECT sensor and O2 sensor is working ...
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MAF sensor problem?

i have a 2012 vauxhall Zafira 1.7cdti ecoflex motor which has low mpg, i have tested for obd2 codes but there are none,live tests show MAF sensor readings fluctuating from 7.9 to 15.11 g/S on tick ...
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LTFT zero on mazda cx7 2008 + high fuel consumption

I have this Mazda CX7 2008 2.3L turbo, and am experiencing the following: LTFT is zero, no matter what conditions I drive the car on. Gas consumption is high: ~22L/100km (10.6 MPG) DTC P2006: Intake ...
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Trucks fuel economy dependence on weather

I am searching scientific data and studies on the link between weather and fuel consumption in HDV (heavy duty trucks). For now I have found almost nothing. Can anyone help?
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Mitsubishi Montero limited Have EXCESS FUEL consumption

My Fairly used Mitsubishi Montero limited 2000 model has excess fuel consumption like 30litrs per 100km Accompany with very hot interior under the feet even with a c on though vehicle not doing ...
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Sudden Oil consumption increase

There is increased oil consumption in a 2009 chrysler 300c that has the 5.7 Hemi motor .There are no oil stains on the garage floor .There is an apparent fuel consumption increase which we ...
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New plugs, but problems starting (not firing on all cylinders) and poor fuel economy?

Car is a '93 Mk1 VW Cabriolet, 1.8lt injected. The car has had trouble starting - feels like only some of the cylinders are firing. If I rev the engine a little the problem goes away after a few ...
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Short term fuel trim shows -9% (Rich)

Honda Civic 2007 90km odometer Problem- Fuel consumption I have scanned my car and it shows STFT -9% along with below parameters. Coolant temp -> 64 LTFT -> -7.03 Oxygen sensor voltage -> .55v EGR ...
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Which value should takes to show Gauge value, Fuel pressure or Intake Manifold Pressure?

Currently, I'm working on an app which should show Gauge value (inHg) of the vehicle using OBD reader. Which values should I use to show the Gauge? Is there any formula?
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Car sometimes starts rough, almost stalls when coming to a stop, poor fuel mileage

I have a 2013 Chrysler 200 LX 2.4L 4speed automatic. Last summer it occasionally had difficulty starting. One in every few starts it would start rough. Now I've noticed recently it seems like it's ...
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1 vote
1 answer
235 views

2001 VW Beetle 02 sensor car will not go over 65mph

I have a 2001 VW Beetle 2.0 engine with 171,000 miles on it. I have a check engine light on saying that bank 1 lean. It has been like this for years and I have had no problem with it. Yesterday I ...
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1 vote
1 answer
2k views

My Toyota Corolla 2009 Le 1.8l fuel consumption too high

I run my car in normal use in highway and no traffic I spend $20 full tank 90 miles I replace my tires,spark plugs Oem ,Transmission fluid with filter,Engine oil with filter,Thermostat,antifreeze,Air ...
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475 views

Valves calibration vs fuel economy

My new hobby car (Fiat 126p, 2 cyls air cooled, rear mounted) is not doing correct fuel economy. Spark plugs looks ok. Fumes, at cold start are black but as it warms up, it looks ok. The only ...
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467 views

Cars with single fuel type how retrieve tank level to dashboard?

I see that BiFuel cars had fuel level and type readable from ECU by using pid 0151 and 012F. Cars with monofuel don't have this pids sensors, so how the dashboard retrive the fuel level? Maybe the ...
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140 views

Fuel consumption problem

Morning I have a Toyota Corolla LE 2004 model, it consumption level is very high as in 50lt can finish in 2 day from my office to back home with is a 15 minute drive. I have scanned the vehicle ...
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275 views

Truck burning through a lot of gas

Vehicle Information: 2006 Ford F150 4WD with the 5.4L Problem: On the way to work I noticed that the truck was "burning" a lot of gas. As I drove, (at a normal speed - 60 mph) I noticed that the ...
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1 vote
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206 views

Opel Corsa lite 1.4 2002

After reconditioning cylinder head and skimming. Fitting new hydraulic lifters and rockers, find no compression on engine once oil reaches the lifters compression disappears. Tried reducing length ...
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498 views

fuel consumption in CR-V 2007

lately I found my car consuming more fuel than usual,it was doing 8 liters per 100km,then it raised to 12 liters per 100km,I asked its agency to check for the problem,they found nothing unusual,after ...
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1 answer
30 views

Toyota CH-R fuel consumption confusion

I have a Toyota C-HR Hybride Edition 1.8L 2020. I see in the specification that the fuel tank is 43L. With every trip, when I turn off the car, I get fuel consumption statistics for the current trip. ...
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1 answer
66 views

How to measure engine's fuel consumption?

I know this question might not be new, but I am still asking this question as I haven't yet got any satisfactory answer to this. I have done quite a research on this topic and will sum up it here: To ...
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0 votes
1 answer
64 views

Camshaft valve clearance and fuel consumption

Does the clearance between the camshaft and the top of valve tappets (AKA lifters AKA shims) affect fuel consumption? I am asking because it seems to me like the lesser the spacing, the more the cam ...
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Do you need a car's manual to determine the size of its tank?

What is an easy way to compare car models for the longest trip length that can be taken on a full tank? Electric cars are highlighting the biggest advantage of gasoline-engine cars: most electric cars ...
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How does engine braking mapping work?

Some recent cars and a lot of bikes can change engine mapping and change engine braking electronically. For instance, my bike is not an automatic bike, so it has mechanical gears and I am able to ...
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42 views

Speedometer and Odometer not reading, bad fuel consumption

I have a 1995 model Toyota RAV4 automatic transmission. The speedometer and Odometer sometimes works, sometimes doesn't. What could be the problem causing this erratic behaviour. The same car consumes ...
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0 votes
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458 views

Can transmission replacement affect fuel economy?

I recently had the transmission replaced in my 2009 Dodge Grand Caravan. This is my third Dodge minivan, and all of them averaged around 17 mpg in mostly city driving. However, when I got this van ...
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fuel consumption and high ravs

I changed the sub assembly for my toyota altezza but now its consuming too much fuel and now the rav count will at 2000rpm at low speeds 20-60km/h, it had an engine check light for knock sensor and ...
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Seeking information on the accuracy of average Fuel Consumption shown in Instrument Console?

If the speed shown in a motorcycle's instrument cluster is off by let's say ~5 km/h relative to the actual speed, can we say that the average fuel consumption it shows is also prone to show wrong ...
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  • 101
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750 views

OBDLink Settings for Fuel Economy

Specs: App: OBDLink v5.4.1.1072 (iOS) Adaptor: OBDLink MX+ (bluetooth) Vehicle: 1999 Ford F250 7.3 turbo diesel (Aug 98 Production) Have been working with this Scantool for a couple weeks now, by ...
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