Elantra XD (2001-06) :: High Fuel Consumption And Preventive Maintenance

I have a 2002 Elantra GT, is consuming 22 miles per gallon, one of these days the car was alarmed with a check engine, the mechanic checks to see if he had a loose wire, then removed the battery, put it on again and check engine disappeared. Following this, the car is doing 30 miles per gallon. After 5 hours the alarm appeared again, we scan the car and gave the code P0420. These days the car has been decreasing again the miles per gallon.

I bought the car with 186.000 miles but the person who sold me the car said he had 68.000 miles, the board was stolen and damaged something, then had to buy a Yonker the board and that board came with the mileage, is this possible?

What is suggested to improve the fuel consumption?

It is possible to know how much mileage the car has traveled in reality?

With so many miles traveled, which recommended preventive maintenance?

This error code says that the catalyst has to be replaced but can also be a leak or may be some of the oxygen sensors.

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Elantra XD (2001-06) :: TPS Failure Symptoms And High Fuel Consumption

I'm experiencing some TPS failure symptoms and high fuel consumption.... I've unplugged the ecu harness to measure the voltages, measured a constant 6v on the return signal wire while it should be about 0v. While the input voltage is normal 5v. A strange reading as well is that signal reading with both battery terminals is 6v!!

Would this be a short on the ecu cable or is it a corrupted ECU? Also today I had tough hesitation in the morning while the engine was cold, after warm up it was normal! Is this related or its idle sensor?! ( Plugs and their cables are new)...

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Prius (2010-12) Fuel :: High Fuel Consumption While Coasting With Charge Available?

When I go out to do errands around town (I live right in town) I get horrendous gas mileage. Now, I understand gas mileage is high at the beginning of a trip, but for this long and this high and under these circumstances? I'm getting ABOVE 10l/100km when I have 80% charge available (for americans, that's disgustingly high MPG like, pick-up truck high), AND my foot is completely off the gas. Literally, coasting, or braking, and I'm still sucking up gas. What the heck?

Is this just because it takes a certain amount of time for the engine to run no matter what or something? I still don't see any reason for me to be eating up all that gas when my foot isn't even on the gas AND most importantly, I have charge available. Feels pointless for me to use my car for what I use it for 70% of the time, which is for quick errands around town at low speeds. Thought the prius was suppose to be a superstar for this kind of thing.

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Prius (2010-12) Fuel :: Display Consumption Bars Too High?

Just bought a 2012 Prius Three last Friday. The MFD (upper display) shows an average of about 53 mpg so far, and the corresponding 1 & 5 min bars seem to make sense (we have an 07 TCH so we're reasonably familiar).

But the Display Audio unit (6.1 inch) Car>Consumption graph seems to show 100mpg most of the time/most bars. That can't be right and it looks nothing like the MFD display. What am I missing?

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Accent MC (2006-11) :: No Power And High Fuel Consumption

I replace all my spark plugs but my car still has no power and its eating gas like crazy.

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Accent LC (2000-05) :: 2004 - Fuel Consumption High

My hyundai accent 2004 consumes fuel but does not bring out black smoke, what can i do?

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Golf IV / Jetta IV :: VW 1.6 SR (AKL Engine) Rough Running / High Fuel Consumption

Regarding my problem (outline below):

>> Went for a refueling stop, and thereafter proceeded onto the highway

>> Approx. 500m into the drive onto the highway the car started jerking and running rough with an initial puff of smoke (none thereafter)

>> Immediately after this initial jerking/shuddering there was a significant increase in fuel consumption i.e. from a familiar 8.2L/100km to 18L/100km in the cruise

>> We continued driving not knowing what it was (I suspected a spark plug may have stopped working)

>> Pulled up at the gas station to observe what went wrong inside the engine bay - no signs of any leaks, fuel sprays, etc. but only that the engine was shaking

>> I checked the rear of the car while the car was idling and observed a pulsating sound...some light smoke and a fuel-rich egg-like smell

>> Asked around and I was led to think the catalytic converter was ruined, so the next day I had the catalytic converter cut out

>> After removing the catalytic converter the problem persisted...although the engine operated with slightly less flow resistance

Attempt at diagnosing the problem

>> My wife called in a technician from BMW at Canal Walk to come have a look and what errors were flagged

>> The tech ran the diagnostic and no fault codes were indicated, except a few short circuit faults due to my incorrectly placing -ve on +ve when I tried to charge my cars battery with jumper cables

>> He proceeded to ask if we changed the spark plugs, I said yes. He then looked at the oil on the intake manifold and said there could be a torn valve on the intake manifold and that air that is not measured by the air mass flow sensor is entering the engine, which is causing the car to rev hunt (this problem of rev hunting has been with us for a while). The engine also shuts down uncommanded at stops and sometimes between shifting gears with the subsequent loss of power steering (very dangerous!!)

>> We also had the O2 sensor replaced a month before this occurence

The images attached (#1- #3) are marked up to indicate the component I am referring to.

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Went to Cape City VW in Cape Town and the part number for that orange thing/diaphragm is 06A 198 205A 'Repair kit for valve'. Is this significant? The car sounds as strange at idle...as if has noisy valves. I can upload (if there is an option) a sound clip of how the car sounds if this assists.

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Accent LC (2000-05) :: Transmission Reluctant To Downshift From 3rd And High Fuel Consumption?

I recently bought my new car through a family friend.2000 Hyundai accent auto owned by a 90yr old grandpa since new with only 45k on the clock. im used to driving a manual so I don't know if its just me not used to it but when I slow for a corner to say 15-20km/hr and accelerate out the transmission remains in 3rd gear unless I give it a really good prod then it changes to 2nd or 1st. the acceleration when It does this and stays in 3rd is ok but I just wonder if its normal or is it just burning out the torque converter. also im only getting about 380-400kms out of a tank when driving the same route my old 96 pulsar used to get 550kms from the same fuel. is this normal I would have thought this new car to be using if anything a little less.

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Ford Excursion :: Knocking When Full Throttle - High Fuel Consumption?

It's time to do some oil change and is using 10w30 synthetic but the truck is eating fuel like crazy and I can hear some kind of knocking when full throttle .

Sparks , boots and fuel filter is new . The mechanic said I should put some lighter velocity oil . truck odo 130k v10 hot hot weather .

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Prius (2010-12) :: Oil Consumption At 136k Miles - Too High

The oil consumption started around 90-100k miles. My wife mostly drives the car so I just check it and fill it without keeping track of mileage. Last week I had a lot of driving to do so I topped off the oil before starting my trip and put a 5 qt 5-20w bottle in the back. I've been through two liters in 2100 miles! Sheesh - I'm ticked off. I do my own oil changes at least every 10k miles, always use 0-20w or 5-20w full synthetic oil (usually Mobil 1). I replaced the spark plugs at 119k miles per maintenance schedule.

Besides the oil consumption, since 115k miles the engine can get into a mode where it misses a little bit at low power once it is completely warmed up. I have a good code reader and nothing ever shows up. I expected the new spark plugs would fix it, but they didn't change anything about how it runs. It is slowly getting worse. I'm going to wait until a code in the ECU is set before fixing it. It could be an ignition coil. I suspect it is an O2 sensor which causes the AFR to be too lean which makes the mix hard to ignite. Time will tell. It runs fine when cruising at highway speeds.

We bought this 2010 Prius III, not 3, new in October 2010. The only out-of-the-ordinary thing we do is live in northern Wyoming where it can be very cold for a long time. We drive 85 mph for long distances to go shopping and visit friends. The gas mileage is the same as it has always been. It varies between 42 and 50 mpg in the summer and 35 and 45 in the winter.

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Lexus RX 2010-15 :: How To Reset Fuel Consumption

In Menu -> Info Phone -> Fuel Consumption

How can I reset the fuel consumption?

I couldn't find it on Owner Manual...

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Prius (2010-12) :: When Braking Engine Would Sound And MPG Indicates Fuel Consumption

Yesterday we were on a 10 hour trip and the engine was acting oddly; when braking, the engine sounded just like the engine brake, but the MPG indicated that it was consuming fuel (engine brake does not consume fuel). When braking, the engine would sound, and the MPG indicator indicates fuel consumption, it would go down to 50, with the heavier braking, like when stopping... then at a certain point it would suddenly stop

It seemed to happen most times but not always. This issue didn't happen before.

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Prius (2010-12) Fuel :: Consumption Display Misleading / Getting 480 Miles Before Running On Empty?

Just bought a used 2010 prius II about 2 weeks ago with 10000 miles on it. As I've been driving I feel the consumption display is misleading. It averages around 52-53 mpg, but I'm only getting about 480 miles before I'm running on empty. The tank capacity is 12 gallons right? If so I should be getting at least low-mid 500's before I need to fill up again. Hopefully I'm calculating something wrong and its not the car itself.

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Prius (2010-12) Fuel :: High Temps Dropping Fuel Economy?

While most of the emphasis I've seen on improving fuel economy seems to focus on warming the car up quickly in cool/cold weather, I seem to be experiencing significant mpg drops at the other end of the spectrum.

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Prius (Gen 2) Fuel :: 2005 - Fuel Consumption Increase After Service And New Brakes

So, my 2005 Gen II Prius went for a scheduled service on Wednesday, 70k miles, Toyota main dealer. They called and said it needed new front brake pads and disks, I was surprised but gave the go ahead. There would occasionally have been a mild squealing sound from the brakes at very low speed so I accepted the pads might need replacing, I was surprised the disks needed replacing but it hard to argue about brakes, especially as I only have the car a year (I'm the second owner and it has a full Toyota service history). It had a "major" service, new spark plugs, new front brake pads and disks.

Since collecting it I've noticed that the engine seems to kick in more often and needs higher revs. The fuel consumption seems higher, normally mid 50's MPG (imperial gallon) now 35MPG. However it hasn't been driven many miles since its been serviced so its a low distance for calculating MPG. I've also noticed that the car seems to slow more quickly without applying the brakes, a regularly driven hill that I coast down at 48kph now only gives 35kph. Also, if I drive on a flat road for a mile or 2 and coast to a stop the front brake disks feel VERY hot, way too hot to touch, drivers side more so that passenger side.

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Elantra GD (2013+) :: Revs Suddenly Increase From 2200 To 2700 Rpm - No Accelerator Pedal Movement

I've noticed when encountering a moderate hill at 60 mph in cruise the revs might suddenly increase from 2200 to 2700 rpm, then back down slowly as I crest the hill. If I'm in manual mode it stays in 6th gear, but almost feels like a downshift. I also feel no accelerator pedal movement. Is this a two stage intake at work?

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Prius (Gen 3) Fuel :: Hourly Fuel Consumption At Idle?

What is the hourly fuel consumption for a Toyota Prius at idle? Purpose is keep cabin warm for 8 hours. Would this damage engine?

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Elantra XD (2001-06) :: Fuel And Temp Gauge Would Either Be High Then Go Low

I replaced my battery. Once I connected my new battery, my fuel and temperature gauge started working strangely. They would either be high, then go low, then go back high. My interior lights, clock, and radio stopped working. Could it be a relay? I checked all the fuses with a test light and they all looked good.

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Elantra XD (2001-06) :: High Pitch Noise By Fuel Injectors

When the car is cold & first started, the high pitch noise by the fuel injectors is the loudest. When it warms up the noise is reduced quit a bit.

I thought maybe the fuel injector O-rings are bad, but the car idles and runs fine ( no error codes). Maybe the intake manifold gasket, but the car idles and runs fine. It is a weird noise.

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