Question about Hyundai Accent

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I get a huge amount of gery smoke while climbing uphill in my hyundai accent , fuel consumption is also very low , i did a sytem scan and it showed that it is the air flow sensor and the oxygen sensors , wat could cause the smoke ? is this due to the a/f sensor? pls help.

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When the airflow sensor goes it thinks that its cold,so it acts like the choke is out.replace the sensor,then see,you may find that thats all thats wrong..

Posted on Mar 22, 2011


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Hello all I have an accent 2005 CRDI. It starts in the morning After a little ride It stubborns to start and I can see lot of smoke and the mechanic says it is fuel injector problem. Please advice .

Venkata, According to "
Fuel injector symptoms for bad, faulty, dirty, clogged, or leaking injectors are :

  • Starting issues

  • Poor idle

  • Failed emissions

  • Poor Performance

  • Engine does not reach full RPM

  • Increased fuel consumption

  • Rough engine performance

  • Surging and bucking under various throttle loads

  • Smoke from the tail pipe

  • Engine Knock or Detonation which can lead to catastrophic engine failure

  • Pollution"

Venakta: I have had very good luck with a fuel injector cleaner sold by Advanced Auto called KX44 but some people like Seafoam. It is a cheaper place to start than with a mechanic.

Apr 14, 2015 | 2005 Hyundai Accent

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I am using accent CRDI 2005 model, and I find the black smoke coming from the exhaust and vehicle is taking pickup. when i asked the mechanic, they were asked to change the turbo which is not opening......

Black smoke indicates mild excess fuel conditions exist or inefficient combustion resulting in lots of carbon particles in the exhaust gas. This amounts to there being too much fuel for the amount of air or the fuel being injected at the wrong pressure or with a bad spray pattern.

The problem could be anything from a strangled intake to bad fuel injectors and lots of stuff in between. Generally there will be other symptoms as well as the smoke, such as poor performance and increased fuel consumption.

Beginning with a thorough underbonnet visual inspection and followed with a code read might provide a clue. Although the symptoms could be caused by something as simple as a displaced or split vacuum line to the turbo wastegate servo, it is as well to follow best practice and make certain the routine maintenance is up to date and correctly carried out before moving on to checking the correct turbo operation and pressures and egr system operation.

No one could tell you exactly what the problem is without first going through a diagnostic process. A turbo is too expensive to change unnecessarily which makes the systematic approach very desirable..

Feb 17, 2015 | 2005 Hyundai Accent

1 Answer


Do you have black smoke or what looks like soot coming out of the tail pipe. The check engine light monitors fuel pressure through the computer and pressure regulator. It will come on if the pump pressure is too high or too low. If the pressure regulator is faulty it could cause excessive fuel consumption,

Jan 19, 2015 | 1999 Hyundai Sonata

1 Answer

What to do, my petrol accent getting hot to fast......? and also giving very low mileage 10km/lt

could be a faulty thermostat for the overheating and a dirty air filter for the fuel consumption

May 02, 2011 | 2002 Hyundai Accent

1 Answer

I see a huge amount of grey smoke while climbing uphill in my hyundai accent , very low fuel consumption as well. i did a system scan and it showed the air flow sensor and the oxygen sensors giving...

most likely cause is worn pistons rings but again as with many of these questions if i head under the bonnet i could tell yuo straight away ,grey smoke is a signal of burning oil or antifreeze ,oil is more of a blue colour but whilst vehicle is moving then its difficult with the dispersal of the exhaust

Mar 22, 2011 | Hyundai Accent Cars & Trucks

2 Answers

Very low m.p.g.for hyundai accent 2004 only on a long journey suppose to be 45 ideas ? please fin.

weather is a factor
the age of the car is a factor
parts are wearing out slowly making the engine less efficient to run
a new fuel filter, air cleaner, tune up may help out more than likely too
take it to Auto Zone for a free scan of the computer if you like

Mar 07, 2010 | Hyundai Motor 2003 XG350

1 Answer

Hyundai coupe excessive fuel consumption

Unless the Check Engine Light is ON, there is no vehicle-related issue to fuel consumption. The computer will deliver the exact amount of fuel needed to satisfy the demands placed on the engine, using input from a large variety of sensors, including the accelerator pedal position sensor. Fuel economy estimates in the USA are just that, estimates, derived from a chemical analysis of emissions, and not actual driving. And no vehicle ever hits those numbers.

There are numerous outside factors that have a negative impact on fuel economy:
Vehicle maintenance, driving conditions (stop & go driving KILLS fuel economy), accelerator pedal usage, overall vehicle speeds, loads carried, etc.

Remember, the more you use the gas pedal, the more you use the gas station!

Feb 09, 2010 | 1999 Hyundai Accent

1 Answer

Using to much oil a 2002 accent with 76k. uses about a quart every 1k miles. dop i need to adjust the valves?

That's within acceptable limits according to Hyundai Motor America's standard: For a proper diagnosis, the amount of oil consumed over a known mileage should be checked three times and then averaged.The accumulated mileage divided by the total amount of oil added will give the consumption rate in miles per quart. If the oil consumption rate is greater than 1 quart per each 1000 miles, further diagnosis may be required.

May 18, 2009 | 2002 Hyundai Accent

1 Answer

Oil consumption, no smoke, no leaks

Oil consumption can be when the piston rings worn out, also valve gaides worn out.
means engine oil passes through the combustion chamber, you cant see smoke sometimes.but when condition of the piston ring is wost you can see smoke behind the exhaust.

Oct 12, 2008 | 2001 Hyundai Accent

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