Question about 1994 Mazda 2WD B Series Pickup

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Hi I have a 94 mazda B2300 4 cylinder, Why very poor gas mileage

Hi I have a 94 mazda B2300 4 cylinder, Its got a fesh tune up, oxygen sensor, coolent tempreture sensor, smogs okay, timing is correct, new air filter correct tire pressure, canged auto trans modulator. operating temp stays at 160 even with the correct thermastat. I get 13 mpg, this truck should get at least 20.any ideas? Thanks

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Check the fuel filter or a possible leak in the fuel line or vacuum lines.your exhaust could be clogged causing too much back pressure

Posted on Mar 15, 2009

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Posted on Jan 02, 2017

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My Mazda Demio. 1.3 is using too much petrol


Okay- thanks for the public announcement;...just kidding!
Mike it sounds like you have a heavy foot on the gas pedal- speeding around town- Ohhh, I gotcha' again! Or someone is pilfering your gas by siphoning it out; LOL

Okay, all kidding aside, the following issues can cause poor fuel economy:
  1. Incorrect tire pressure
  2. a bad or malfunctioning oxygen sensor
  3. dirty or plugged air filter
  4. dirty or malfunctioning fuel injectors
  5. improperly working spark plug(s) e,g. misfires or improper gap
  6. poor driving habits, like sudden accelerations
  7. engine idling for inordinate or extensive amounts of time
  8. and as silly or unbelievable as it might sound, the type of motor oil...the viscosity that is used can affect gas mileage by up to 10-12%; regular oil changes using synthetic or manufacturer recommended oil that reduces friction should be employed.
  9. Defective coolant sensor
  10. Defective thermostat
  11. a leak in the intake manifold or EGR
  12. Poor compression- If you are driving a car that has high mileage, over 100,000 miles, affects fuel economy
  13. clogged catalytic converter or some other restriction in the exhaust system
  14. Dragging brakes
  15. slipping clutch or transmission
  16. Lugging around excess weight in the car
Any single one of...or combination of the above, could greatly reduce engine performance and affect gas mileage.

Feb 04, 2017 | Mazda Cars & Trucks

1 Answer

Just bought ford fiesta finesse 16 valve 03 1.2 am doing roughly 21mpg no leaks or drips this is round town and on motor way have not taken it above 65


Hi


As far as the review says the mileage should not falter since it is new as you said. However

These are the causes of a poor mileage in a car:-


Poorly Inflated Car Tires

Car tires that are improperly inflated create significant road resistance and drag on a moving car. A car engine has to work harder to propel a car forward due to this increased tire/road resistance. This resistance chips away at a car's gas mileage.


Dirty Air Filter

A dirty air filter impedes air flow into a car's engine, a process that disrupts normal engine combustion and makes it less efficient. This causes a reduction in both engine performance and gas mileage.


Bad Spark Plugs

Spark plugs are responsible for igniting a car's air/fuel mixture, an event that causes a mini explosion inside a car's engine cylinders. Bad or dysfunctional spark plugs don't fire, or ignite, properly; thus, they affect engine combustion negatively, which in turn negatively affects gas mileage.


Bad Oxygen Sensors

For a car to be at its most fuel efficient, its oxygen sensors, small and electronically operated, automatically adjust a car's air/fuel mixture and have to be functioning properly. Bad oxygen sensors cause abnormal air/fuel mixture ratios, a condition that results in poor gas mileage and poor vehicle performance.


Leaky Fuel Injectors

A car's fuel injection system is responsible for injecting precise amounts of fuel into a car's engine cylinders, where it is combined with air and ignited. For a car to perform properly, a specific amount of fuel has to be injected by each fuel injector into each engine cylinder. A leaky fuel injector wastes fuel by leaking it outside the engine and reducing the amount of fuel that makes it into the engine. This results in wasted fuel and reduced gas mileage.
It is suggested to start with a code scanner to find out if there are any stored fault codes in your car.

Also check this link for some helpful tips:-


http://www.wikihow.com/Increase-Fuel-Mileage-on-a-Car


Please get back to us if you have further query else please accept the suggestion.
Thank you for contacting fixya.com

Jul 18, 2011 | Ford Fiesta Cars & Trucks

1 Answer

Burn to much gas.


Do a tune-up. this could cause your gas mileage to be extremely poor. And check your oxygen sensors. Hope this helps, James Booth

May 17, 2011 | 2004 Chevrolet Cavalier

3 Answers

I'm getting trouble code p1174 on a 2008 chevy uplander and bad mileage


i have an 2007 chevy uplander flexfuel i keep getting p1174 also i have replaced the the o2 sensors and the light keeps coming on
i belive it has something to do with the fuel injection system

Aug 07, 2010 | 2008 Chevrolet Uplander

1 Answer

1987 Dodge Caravan getting poor gas milage


If you suddenly are getting poor gas mileage your O2 (oxygen) sensor may have failed. The O2 sensor helps dictate how rich or lean the fuel mixture is. If it fails the engine's computer defaults to a rich mixture so not to burn a valve or run too hit. This can be checked and if need be easily replaced. And yes if the van is over-do for a routine tune-up this is always a good investment. Make sure to check the air filter too, if she's dirty the engine will starve for air and get poor mileage.

I hope this may have assited you,
Tom

Apr 15, 2010 | 1987 Dodge Caravan

2 Answers

Buick regal 92 3.8L Horrible fuel mileage


Sounds like you might have an oxygen sensor problem. Your catalytic converter(s) maybe defective or dirty. That in turn can dirty up the oxygen sensor. A defective oxygen sensor will send faulty info to the computer, interpreting the fumes as cold (even when the engine warms up). That causes the computer to adjust the fuel mixture to very rich, giving you poor gas mileage and the fuel smell. Hope it helps.

Mar 16, 2010 | 1992 Buick Regal

1 Answer

Poor gas mileage after tune up


change the air charge sensor on the back of the intake

Jan 19, 2010 | 1994 Jeep Grand Cherokee

1 Answer

My car has poor acceleration and it shakes when stop also smells


Sounds like you're missing on a cylinder or two. Tune it up, first. That might very well fix your problem. Tell the part store guy you need a COMPLETE tune up kit and replace everything that he gives you parts for. Not just plugs and wires, although they would be better than nothing. I'm pretty sure this will fix you up. The symptoms you're describing are classic for a tune up.

Nov 30, 2009 | 1994 Nissan Maxima

2 Answers

I've owned two 1997 Jeep Wranglers and eventually they both shared a common problem of rough idle, low fuel mileage, check engine light and and rough acceleration. Sometimes it would run fine but sometimes...


Hi,
This is a broad spectrum of possibilities. I would first start with a simple approach of insuring good gas.
When these symptoms occur, get a bottle of fuel additive and add to your tank. Possibly you have some condensation issues. This could be just the ticket... I hope so. Good luck.

Oct 23, 2009 | 1997 Jeep Wrangler

3 Answers

1995 GMC JIMMY Runs rouph, P0306 stored rich condition, blck smoke out tailpipe


Prob needs a o2 sensor or oxygen sensor they are called

Sep 17, 2009 | 1995 GMC Jimmy

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