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What causes a engine to burn fuel - 1995 Nissan Sentra

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Well Depend On Many Factor ...Exemple Bad Tune-UP like spark-plug issue.. Carburator or Injector issue, Tire pressure to low,
Engine mal functionning Brake and Hand brake defect..may cause your car very hard on gaz..

Posted on Oct 01, 2010

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Why the spark plug keeps burning after a couple of days.Then i renew it and it will happen again.


does it start every time
check list
running hot
too much revs and load
fuel mixture too rich /lean
coil problem
burnt valve
burning oil




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Jun 30, 2016 | Cars & Trucks

1 Answer

What is wrong with my 2004 mazda rx8. Cat. Converter was glowing red,running poorly & louder than normal. Changed cat & resinatorpipe but problem persists.


RAW FUEL IS ENTERING THE EXHAUST AND BURNING IN THE CAT. YOU MUST HAVE AN ENGINE MISFIRE ON ONE OR MORE CYLINDERS CAUSING THE SUPPLIED FUEL TO THE ENGINE NOT TO GET BURNED. I WOULD SUSPECT A BAD SPARK PLUG OR PLUG WIRE GIVING YOU TROUBLE AND CAUSING THE ENGINE TO RUN ROUGH AND ALSO CAUSING THE FUEL TO NOT GET BURNED IN THE CYLINDER

May 03, 2015 | 2004 Mazda RX-8

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My 1999 chevy blazer is running rich where I smell fuel fumes can this cause the truck to loose power and not go over 30 but the engine runs smooth


Most likely, A good "burn" is the right Fuel-air mixture. Too much fuel bad burn lots of black smoke. Not enough fuel It may not burn at all. Any emission codes? I will bet it won't pass an emissions test, so get it fixed. Probably affects mileage. Do you smell fuel in the engine compartment? you have a dangerous leak. Or do you smell at exhaust? Do you smell in the cab?
Probably leak in engine bay, or even under the truck's fuel line, filter, pump. or tank.

Mar 09, 2015 | Cars & Trucks

1 Answer

Burning much gas


A lot of things can cause a car to burn more gas. A clogged fuel filter, bad spark plugs and spark plug wires. Also a clogged O2 sensor will cause the engine to work harder reducing fuel mileage. Perform a complete tune up, replace the spark plugs and wires, replace the fuel filter and air filter.

Nov 10, 2013 | Toyota Cars & Trucks

1 Answer

My 1997 town car is burning to much fuel not leaking it but burning it i can smell the gas when driving it


It can be several things. The engine automatically sets to a RICH mode for cold starts. It will stay in RICH until a temperature sensor warms up. There are sometimes 2 sensors with one for the dash and the other for the engine controls.
Next would be a faulty fuel pressure regulator keeping the pressure too high. Or dirty fuel injectors failing to close properly.
Finally, air leaks in the intake manifold will make the O2 sensors dump fuel to restore the fuel ratio. Check with water spray bottle on intake seams while engine is running.

Apr 25, 2013 | 1997 Lincoln Town Car

1 Answer

1987 nissian maxima The car is getting way to much fuel replaced the egr,fuel pressure reg,spark plugs and wire, check fuel pressure,checked for vac leak


engine miss caused by many things,weak ignition from bad ignition coil, ignition timing off if you have high mileage engine low compression from worn burned valves.could have something minor like stopped up air filter, clogged dirty fuel injectors, through the years i have seen many things cause engine to miss.

Nov 26, 2012 | 1987 Nissan Maxima

1 Answer

Can i drive my rodeo with a stuck open thermostat whats down fall


YOU WILL LOT OF FUEL CONSUMPTION. A OPEN OR MISSING THERMOSTAT WILL CAUSE VECHICLE STAY IN OPEN LOOP.ENGINE WILL BURN RICH BURN MORE FUEL.YOUR THERMOSTAT ALLOWS COOLANT TEMPERATURE TO GET AT A SET POINT WHERE ECM OR PCM ADJUST FUEL SYSTEM FROM OPEN LOOP RICH MIXTURE FOR COLD ENGINE TO CLOSED LOOP TO LEAN OUT FUEL SYSTEM AS ENGINE COOLANT TEMPERATURE GET HOT.YOU NEED TO REPLACE THERMOSTAT.OPEN THERMOSTAT WILL CAUSE NO HEAT PROBLEMS ALSO.

Aug 16, 2011 | 2000 Isuzu Rodeo

1 Answer

My car's fuel consuption has suddenly gone up, from 9-10km/L to hardly 6-7km/L. Engine type is 1G-FE. What are the possible solutions?


There is fuel leaking outside the engine. Possible areas are the tank itself, fuel lines and fittings, and the fuel filter. These usually cause puddling under the vehicle. However, if fuel is leaking onto hot exhaust system parts, it will vaporize and leave no puddle. Find and fix the leak.

There is fuel leaking inside the engine. This is usually from a fuel injector that is leaking fuel into one of the cylinders. The engine will run rich and burn extra fuel. The fuel leaking past the rings of the piston in the cylinder involved will contaminate the engine oil and give it a fuel odor. The contaminated oil will not lubricate the bearings properly and more engine troubles will develop. Find and replace the leaking injector.

Fuel may be being burned due to an unnecessary rich mixture caused by a malfunctioning oxygen sensor. Oxygen sensors are usually designed to fail to the rich mixture side. Failing to the lean side would cause engine damage. On the rich side, the engine is protected from damage although fuel mileage will suffer. You may see black smoke while accelerating and a sooty carbon buildup on the inside of the exhaust tailpipe. Test the oxygen sensor and if it fails, replace it.

Jan 17, 2011 | Toyota MR2 Cars & Trucks

2 Answers

I've changed the oxygen sensor and the O2 sensor and new plugs on my 97 dondge 3.9 van and it still blowen black smoke (rich) seems to run real good on top end but theres is a flat spot where theres no...


Black smoke indicates no air, check your air filter, if you have done that and it is ok, check the PCV valve. Thats about all that I can suggest. Hope that helps.

Dec 07, 2010 | 1996 Dodge Dakota

2 Answers

Why engine exhausted blue,black and white smoke


ENGINE SMOKES BLUE THE ENGINE BURNING OIL DUE TO WORN PISTON RINGS , WORN VALVE GUIDES AND SEAL./ ENGINE SMOKE BLACK ENGINE GETTING RICH FUEL MIXTURE CAUSED BY DIRTY AIR FILTER, WEAK IGNITION SPARK, FAULTY FUEL PRESSURE REGULATOR OR LEAKING FUEL INJECTOR, EVAP CANISTER GAS SOAKED./ ENGINE SMOKING WHITE ENGINE BURNING ANTIFREEZE DUE LEAKING INTAKE GASKET OR BLOWN HEAD GASKET. IF ENGINE HAS A LIGHT WHITE BLUE SMOKE ENGINE BURNING TRANSMISSION FLUID DUE TO A RUPTURE VACUUM MODULATOR DIAPHRAM ON TRANSMISSION.

Nov 20, 2010 | 2003 Hyundai Accent

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