Question about 2003 Saturn VUE

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Check engine light staying on, fuel consumption is greater than usual

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First get the car scanned, you need to know why the light is on

Posted on May 04, 2010

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Posted on Jan 02, 2017

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My Hyundai 1999 model CHECK ENGINE LIGHT IS ALWAYS ON AND THE FUEL CONSUMPTION IS HIGH.


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

2 Answers

How can we achieve fuel efficiency while driving my car?


Do these these things
-Inflate your tyres to correct pressure or a little over, when cold
-Don't accelerate quickly or rev the engine up , most especially when cold
-Try to drive smoothly in traffic with a light foot, not jerkily
-In cars with small engines A/C will consume more fuel
-Fill up with the least ethanol that is legal, and that your car will tolerate. Consult your driver handbook. Efuel gives less economy
-Don't cart heavy loads around in the car for convenience' sake. Take them out till you need them.
-Don't put roof racks and travel pods on when not needed. These create drag
-On the highway travel at 10% under the limit. Less and you will irritate others, but high speeds increase fuel consumption greatly

Oct 30, 2013 | Cars & Trucks

1 Answer

High fuel consumption noticed


Hi Samuel, Have a diagnostic scan carried out on the vehicle. If it does not record any faults have a service carried out, making sure to replace the fuel filter, air filter, oil filter and to use a good quality engine oil. Have the spark plugs replaced and a full tune up carried out. Your problem has no easy answer. An increase in fuel consumption can be for many different reasons. If the fuel filter has become partially blocked you will press your foot harder to get the required performance. It can be related to brakes binding, or worn wheel bearings. An increased fuel consumption can be related to different tyres with different tread patterns having been fitted or even incorrect tyre pressures. It can be related to bad wheel alignment. It can be related to a greater load of out put on the alternator or AC compressor output load. Let me have some more details and we'll see what we can check and hopefully solve the problem. Regards John

Jan 19, 2013 | 2003 Toyota Camry

1 Answer

Black smoke and high gas comsumption


This sure sounds like a "rich" condition. Meaning the engine is receiving too much fuel from the fuel injection system or the carburetor, depending what type of fuel delivery system you have and the year of the vehicle. A rich condition most always causes excess carbon (black smoke) and high gas consumption. A common cause of this on later model vehicles with fuel injection is a bad fuel pressure regulator allowing too much fuel to enter the throttle body. Many pressure regulators are connected directly to the fuel rail running along the topside of the engine. It's about 2-3 inchs round and has a vacuum port on top of it. If it is easliy accessable, pull the vacuum hose off of it and see if the engine idle speed stays the same, also check for any unwanted fuel inside the vacuum hose. If those 2 conditions exsist, chances are you have a bad fuel regulator.

Carbureted vehicles are another story. They have a float and a needle & seat assembly inside which sometimes get stuck or dirty, allowing too much fuel to enter the engine. Both of these parts are deep inside carburetor and are best left to a professional technician to diagnose. One last thought. A bad oxygen sensor (O2 sensor) will sometimes cause a rich condition. But if an O2 sensor goes bad, it is usually accompanied by a "check engine" light coming on.
If your check engine light is not on, it's probably is not the sensor. Hope this helps some, good luck..

Sep 29, 2011 | Cars & Trucks

1 Answer

I ave a 1996 tacoma and the check engine light stays on and its burning too much gas


Hi Dv,
If the engine check light is being displayed, you have a problem with the electronic management system and you should have it diagnosed and rectified. A number of problems could result in high fuel consumption the most likely being a defective mapping sensor.
Regards Johngee10

Mar 02, 2011 | Toyota Tacoma Cars & Trucks

1 Answer

Emission light stays on and uses more petrol than before,car still runs fine except the fuel consumption. i have a clio extreme 04 plate. is it the lambda sensor or am i barking up wrong tree please advise...


perhaps a tune up is in order as well as check all vacuum lines for dry-rot causing it to ****-air it will contribute to fuel consumption as it takes more fuel to stay running as well it may be a hi idle or choke sensor Midas and a few parts stores offer a free scan if your ck engine light stays on

Nov 04, 2009 | 2004 Renault 181

2 Answers

My 2001 Suzuki XL 7 is consumming excessive fuel 1litre for 4 km


Poor fuel consumption can be caused by a few things. One being the O2 sensor. You should also check your spark plugs, fuel filter, air filter, and try to find out whens the last time the vehicle had a tune up. Check your tires and make sure they are properly inflated as underinflated tires can make the engine work harder and consume more fuel. A little preventive maintanence goes a long way. Check engine light usually means the computer has detected a problem with the emission control for your vehicle. Have that checked ASAP because the longer you drive with the light on the greater the chances of permanent damage to the ECS.

Mar 19, 2009 | 2002 Suzuki XL-7

4 Answers

Continous check engine soon light


I have engine light on mine as well. The car is not used daily or even weekly and finally tracked it to a low charge/faulty battery. 

Dec 27, 2008 | 2002 Bentley Arnage

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