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0
votes
1answer
39 views

2004 Audi TT 1.8 poor MPG

I have Audi TT 1.8 04 plate My average miles is 50/60 per week. However I don’t seem to get many miles for a fuel tank. Average 210 for £60 fill up. What could be the problem ?
0
votes
1answer
343 views

Calculating fuel flow rate through obd || sensor not supporting 015E and 0110 commands

I have been working on a project where i want to calulate fuel flow rate using data from the obd2 sensor. The car on which i was testing didn't support the pid 015E which is for fuel flow rate. Then i ...
1
vote
1answer
508 views

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 ...
2
votes
1answer
274 views

Diagnosing a p0420 code for 2005 nissan x-trail 2.5L

I own a 2005 nissan xtrail with a 2.5L engine (QR25DE). I have problems with my vehicle, too much fuel consumption ( 3.8km/L ) My car has a 60Liter tank , my last fuel up gave me 229KM until the ...
0
votes
1answer
56 views

Bajaj discover 125(2011model) runs like always giving reserve fuel warning even when fuel is sufficient

I have Bajaj Discover 125 (2011) model which has always been taken care by me. as i dont ride bike much it only ran upto 20,000 km till now in plains. (Punjab). Everything was fine and the bike ...
1
vote
1answer
88 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 ...
0
votes
1answer
35 views

Fuel Economy Calculation

There are 2 possible routes in the morning. A 19 Mile route (which is mainly motorway). Average speed is 60 Mph and the average mpg is 45. Or a 11 route, flat ground but it's mainly city so the ...
2
votes
0answers
96 views

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 ...
1
vote
0answers
122 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 ...
4
votes
2answers
105 views

Slightly low MPG - need help with my checklist

I own a '91 Ford Sierra 2.0 8V SOHC. Fairly simple engine, utilizes a Bosch L-jetronic fuel injection system. (EFI has following components: MAF, MAP, TPS, IAC, narrow-band o2 sensor, TFI module for ...
2
votes
1answer
184 views

Why Ride by wire when the fuel injector is there

I feel confused on understanding this system on 1. The difference between FI and Ride by Wire 2. how it improves the fuel efficiency when compared to the ride by wire system and conventional ...
8
votes
3answers
24k views

Best way to repair a rotten fuel line?

I believe the feed line in my fuel system has rotted. If I'm going to cut out the rusted areas and splice a new line in... Is it best to flare a hardline? Is steel the OEM material? How would I ...
4
votes
1answer
583 views

How to calculate fuel consumption and CO2 emission on flex fuel cars using OBDII data?

Here is the thing: I'm trying to estimate the fuel consumption of cars using OBDII data. It's quite simple if we can treat each fuel and its stoichiometric air fuel ratio separately, but when it turns ...
7
votes
3answers
536 views

Engine Size and Fuel Consumption (cost of driving Audi TTS)

My boyfriend drives an Audi TTS 08 and recently has told me that it costs £15 just for 22 miles in petrol to see me, that's why I apparently don't see him much. When I confronted him about it, he said ...
4
votes
1answer
120 views

Why does the engine have lesser pulling strength when the fuel in the tank is lesser?

I've noticed a difference that when the fuel in the tank is low, it takes a bit more time for the bike to accelerate to a higher speed than if the fuel tank is mid level or full. Same thing said by a ...
6
votes
2answers
177 views

How can vehicles run on E?

Sorry if this topic is too open ended I'm new to this site. I am studying engines and how they work and I keep wondering, how do cars with no gas still manage to run for a few extra miles? If you ...
28
votes
6answers
10k views

Do cars consume less fuel when in Neutral? [duplicate]

Imagine we're going down a hill and we're driving a manual car. There are two situations: If I put my car in neutral it will go downhill without any need for the injector to squirt fuel into the ...
3
votes
2answers
73 views

1980 Chrysler LeBaron Failed Emissions Test

My 1980 Chrysler LeBaron (V8 318ci) just failed an emissions test. I'm coming from a state without emissions testing to a state that requires it. Specifically, the only part that failed was the ...
16
votes
13answers
245k views

Is the ECON button just a placebo?

I recently bought a Honda Civic that had this in the car: I have no idea what it does, and how it's supposed to help. Even Honda's website is ambiguous, just using a lot of fuzzy words to describe ...
2
votes
1answer
4k views

Car stalling in the morning

I have been dealing with an elusive CE light and some shaking of my car for a while now. For a while it was just shaking occasionally, I thought it was a moisture problem, but that doesn't seem to ...
-3
votes
2answers
112 views

Fuel saving devices, working or not?

It is claimed that a small unit installed in the fuel tank can save fuel 20-30%. The basic principle is reducing loss of volatile compounds via negative charged air. I really doubt the principle. (1)...
2
votes
3answers
2k views

Is Petrol usage Proportional to Gas Pedal position

I was wondering about this the other day. Is the petrol usage in the car only influenced by the position of the gas pedal? So for example if I take my foot of the gas and coast for 30 seconds, would ...
0
votes
2answers
191 views

Can I install nano fuel economizer for carb type toyota 3A engine?

Can I install nano fuel economizer for carb type toyota 3A engine? Will it help to improve fuel consumption of my car without any issue?
0
votes
2answers
100 views

Most economical acceleration range

I am designing a GPS based acceleration meter for car. I'm planning to give user some scores based on his various acceleration practices. Not going to the electronics part of GPS, i want to know in ...
2
votes
0answers
2k views

Fuel Consumption and other Fuel related data from basic OBD-II parameters [duplicate]

I want to know how can i obtain the values of Fuel Consumption, Fuel Economy and other fuel related information from basic OBD-II parameters like Vehicle Speed, RPM, TPS etc. I have noticed that not ...
2
votes
3answers
104 views

Alternate fuel for motor cyce

In some countries, Government mixes ethanol with petrol & diesel and distributes it to their consumers. This will save some of their imports. My question is Can I blend petrol with Zatropha ...
7
votes
2answers
14k views

Why does my engine perform poorly and get bad gas mileage after using fuel injector cleaner?

At the advice of someone at a local auto parts shop, I poured a bottle of fuel injector cleaner into my gas tank. This happened around the same time that I had a brake job done and rotated my tires. ...
3
votes
4answers
2k views

How much efficiency is robbed from 'pumping loss,' if any?

I'm specifically referring to the loss due to the pistons pulling air through a mostly closed throttle while cruising at highway speeds in a gasoline engine. To give an example, I've always wondered ...
14
votes
6answers
27k views

How to improve fuel economy in high-mileage car?

I'm driving an 2003 Acura TL 3.2 with 177K miles on it. I bought the car with 110K miles on it. It seems to me that the car is not getting the same fuel economy that it did when I acquired it. I ...
6
votes
4answers
3k views

Does the tachometer provide any indication of fuel usage?

So, I'm driving along on the highway with the A/C blasting when I notice the price of gas. It makes me think, "what can I do to increase my fuel efficiency?" Some of the tips I've heard have included ...
11
votes
2answers
966 views

how can I measure the amount of fuel injected into a diesel engine in real time in a purely mechanic pre-OBD vehicle?

This is a Mercedes-Benz 308D van, year 1992, model 602.316. Pre-OBD, no electronics of any sort, everything is purely mechanical. I would like to retrofit a system which would measure the precise ...
17
votes
2answers
6k views

how to optimize fuel consumption by changing the rear differential ratio?

Is it possible to improve the fuel consumption (decrease it) in my van by changing the rear differential ratio? I would like to optimize it for low-speed driving about 40 km/h (25 mph). Is it true ...