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

2 Answers

1991 Toyota Camry running rich after cleaning the throttle body and replaced the throttle positioning sensor. Checked for vacumm leaks but cant find any


92 camry failed smog because running rich. Why? - Toyota Nation ...

www.toyotanation.com/.../411132-92-camry-failed-smog-because-runni...

Apr 26, 2012 - 15 posts - ‎9 authors
off ignition timing, and the car was running to rich. the timing i will get fixed tomorrow but the rich .... Our 93 camry le with 4 cly engine failed agin a few weeks ago, both our toyotas always fail.. they are .... 1991 Toyota MR2 V6 91 MR2 N/A Rough Idle, Running Rich, No Accelleration
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Toyota Camry running rich Questions & Answers - Fixya

www.fixya.com > Forum > Tags > running rich > Cars & Trucks > Toyota
... running rich I have a 1991 Camry that is running rich. I just replaced the O2 sensor and a new cat, oil change, new spark plugs. The car wont pass smog. it is ...

1992 Toyota Camry XLE V6 Excessive Running Rich ...

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1992 Toyota Camry XLE V6 Excessive Running Rich ... 1997Toyota Camry V6 forward Oxygen (O2) Sensors .

Jan 11, 2016 | Toyota Cars & Trucks

1 Answer

Burning smell from engine, poor gas mileage


run the fault codes and check for problem heated oxygen sensors(HO2S) and blocked cat converters

Nov 10, 2017 | Hyundai Elantra Cars & Trucks

1 Answer

I have a 1990 chey truck with a 5.0L failed smog the the max on HC's is 118 and mine read 178 ?? what do i need to do


first tune up. spark plug,wire,cap and rotor,fuel filter,and second catalytic converter saturated.oxygen sensor . you might find and correct your problem

Aug 14, 2013 | 1990 Chevrolet K1500

2 Answers

Idling problem


need to adjust idle speed by turning air adjusting screw on throttle body idle should be 750 - 790 RPM. make sure spark plugs and wires okay. make sure distributor cap and rotor good.replace fuel filter do a little tune because if engine not fine tuned one bad cylinder will cause engine not to idle if you have fuel injection system clean fuel injectors by filling gas tank full add a can of seafoam to fuel tank see what happens.

Jul 29, 2013 | 1988 Mazda B2200

1 Answer

HC were high on smog on 1998 deville


Replace the exhaust converter if it is 15 years old

New Spark Plugs

New Air Filter

New Clean Engine Oil --Full Synthetic 5W-30

New Upstream Oxygen Sensors

Clean MAF Sensor

Feb 08, 2013 | 1998 Cadillac DeVille

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

2 Answers

Will not pass smog. what could be the problem


It is burning to much gas, could be that it needs a tune up.

Mar 13, 2011 | 1988 Chevrolet Nova

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