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Symptoms bad fuel injector

Does the fuel injector affects the mileage of the vehicle?

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  • 111 Answers

Yes it can, it can be partly clogged ,or can be leaking,or just plain weak

Posted on Mar 27, 2014

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Posted on Jan 02, 2017

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SOURCE: symptoms bad fuel injector,

If your fuel injection system has a fuel rail to deliver fuel to the injectors, you will have to remove it before you can remove the injectors.
First disconnect the fuel line at the end of the fuel rail. If there is another lune at the other end remove it too. (always be careful, some of these lines are under pressure).
Remove the screws or bolts which ever is holding the rail in place, if the wiring travels over the rail disconnect it first.
With everything disconnected, pull the rail away from the injectors. Most of the rails are just pressed on to the top of the injector tops, once you've removed the screws the rail should come off easily.
If your vehicle doesn't have a fuel rail then you have to disconnect the clips to each injector. Each injector will have a clip either at the top or at the top on the side that connects to the wire harness. Most fuel injector wiring plugs are held in place by a springy wir. To remove this wire, put a flat head screwdriver between the wire spring and the clip and CAREFULLY pull it away (don't loose it).
With everything off, you are are ready to remove the injectors (it is recommended that you use an injector puller) it is important that you don't break anything or let dirt and debri fall inside of the port wholes of the engine.
With the injector puller you just slide it under the injector and pop it right out.
To put the new injectors in just do the same as removing the in reverse. Remember to be careful and don't force anything.

I hope this helps for you.
Sorry if all thre pictures don't show.
5_11_2013_9_19_22_pm.jpg

Posted on May 11, 2013

airjer995
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SOURCE: what are the symptoms when the ignition coil of a

There will be a check engine light on, possibly flashing, and a code for a specific cylinder(s) misfire. The engine will also usually run really rough.

Posted on Oct 13, 2010

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SOURCE: does the fuel filter affect gas mileage

there are lots of things that can affect gas mileage. if the spark plugs and wires are worn out, the air filter being dirty, dirty fuel filter, proper inflation of the tires, O2 sensors that are contaminated and performing poorly. the first thing to do would be that the engine is in good working order, as in no check engine light, no misfire, etc. a poorly running engine will put out terrible gas mileage. then you can start with the things i listed.

Posted on Feb 21, 2010

SOURCE: bad fuel mileage

We all are. Its called obsurd gas prices! But really, get your oil changed and replace your air filter and possibly go all the way and pay for a tune up. You will see the increase in power performance and gas mileage.

Posted on Aug 28, 2012

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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

Plugs get wet of petrol and car smoke a dark smoke and smell petrol


bad fuel injectors. they are supposed to spray a fine mist of fuel when they are working properly, but when they go bad they can sometimes pour large amounts of fuel in the cylinders. are you getting horrible gas mileage? that is also one of the symptoms of a bad fuel injector.

Sep 18, 2016 | Cars & Trucks

1 Answer

I have a 2000 ranger xlt extended cab 2wd v6 3.0


Depending on your mxt schedule (air filter, oil change, fluids) and the miles on the vehicle here are the things I recommend: (1) check the air filter (if clogged it will affect the performance) and plugs for gap, foiling and burnt tips - replace as required, (2) have a compression test (dry/wet) done to see if there is a problem with the cylinders, (3) fuel system check - could be clogged injectors or bad gas.

Sep 16, 2014 | Cars & Trucks

1 Answer

Misfire p0303


Check wiring harness around and including plug to the coil pack. Also check fuel pressure with vehicle running. I'm not sure of the specs but, Iit should be around 35 to 40 psi. at idle, and 50 to 75 at higher RPM's. I've seen Fords run with a bad fuel pump and demonstrate these exact symptoms

Mar 06, 2014 | Ford 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

Where is the fuel pump located at. My car won't turn over, I don't hear a whine from the rear either. Electrical amd anti theft all work. It cranks but won't get juice. Also where are the coils at? I...


these vehicles have COPs (Coil over plug) type ignition coils. Each cylinder/spark-plug has a single coil on top (4cyl=4coils/6cyl=6coils) They usually dont all fail at the same time. Check the spark plugs if you are getting no fuel or no spark. Also these vehicles are known for crankshaft position sensor failure. This sensor controls the fuel injectors, if faulty here are the typical symptoms: Hard/long starts, random stalls, bad gas mileage, no start (but cranking), misfire, random misfire. Fuel pump is within the fuel tank below the rear seats

Sep 16, 2010 | 2005 Nissan Altima

1 Answer

My 2006 jetta is getting horrible gas mileage for the past two months. What could be causing this?


Several things can contribute - dirty air filter, cheap gasoline (summer gasolines are manufactured with an ethanol component that typically reduces mileage as much as 15 %), dirty fuel injectors, etc. Not like bad plugs unless you have unusually high mileage on your vehicle.

First - check the air filter, then add some Gumout Fuel Injector Cleaner, and then switch to Shell or Marathon gasoline. No real good way to get around the ethanol issue.

Jun 23, 2010 | 2006 Volkswagen Jetta

1 Answer

I have fuel siting on top of the pistons car wont start . turns by hand but acts froze up with starter


1999 Mercury COUGAR Recall ID from NHTSA: 04V421000 Auto Recall Date: 08/30/2004
Vehicle Component: FUEL SYSTEM, GASOLINE
Estimated Vehicles Affected: 88600
1999 MERCURY COUGAR Defect Summary:
ON CERTAIN PASSENGER VEHICLES, CONTAMINATION OF THE FILTER IN THE FUEL DELIVERY MODULE (FDM) CAN REDUCE, AND EVENTUALLY BLOCK, THE FLOW OF FUEL TO THE ENGINE.
Defect Consequence:
THIS MAY CAUSE ENGINE HESITATION, LOSS OF POWER, SURGING, AND OTHER SIMILAR SYMPTOMS. OVER TIME, THE FILTER MAY BECOME SUFFICIENTLY BLOCKED TO CAUSE THE ENGINE TO STALL, WHICH COULD RESULT IN A CRASH.
Remedy:
THIS ACTION IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN AND IS NOT BEING CONDUCTED UNDER THE SAFETY ACT. ALL OWNERS WILL BE NOTIFIED OF THE PROBLEM, AND DEALERS WILL REPLACE THE FDM WITH A NEW DESIGN AT NO CHARGE IF THE OWNER REPORTS THAT THE VEHICLE EXHIBITS ANY OF THE IDENTIFIED SYMPTOMS. THE FREE REPLACEMENT WILL BE AVAILABLE FOR A PERIOD OF 10 YEARS FOLLOWING THE ORIGINAL PURCHASE OF THE VEHICLE, WITH NO MILEAGE LIMIT. THE CAMPAIGN BEGAN ON APRIL 16, 2004. OWNERS SHOULD CONTACT FORD AT 1-800-392-3673.
Notes: FORD MOTOR COMPANY, 04N02

Jul 06, 2009 | 1999 Mercury Cougar

1 Answer

Jeep liberty gas mileage


when was the last time you put in fuel injector cleaner? I put in Lucas Oil Injector cleaner every other or every oil change.

There are alot of factors affecting your gas mileage. Tire wear, tire pressure, wheel alignment, air filter, fuel filter, spark plugs, oxygen sensors, just to name a few. So to say what you need is just shooting in the dark without more information. I would probably start with your oxygen sensors, and then perform a tuneup. If your vehicle pulls to one side or the other when driving on the highway you need to stop into the shop for a wheel alignment.

Nov 24, 2008 | 2005 Jeep Liberty

1 Answer

Gas consumption


Is this a new problem? If so, I'd check/replace the catalytic converter. They clog if bad gas gets into them. Performance is usually affected. If the car has alot of mileage, replace all the oxygen sensors...they affect fuel mix. Change your oil to a 5-20 oil. Change your air filter. Change your plugs if more than 70K miles. Check tire pressure (Mr. Obama is right!) Check wheel alignment by looking at tire wear. Repair any loose front end parts. Check brakes for excessive drag...does the vehicle stop straight???? Use Techron additive to clean fuel injectors following instructions. Finally, do you use your brakes alot? Fast starts? On/off the gas alot? Drive smoothly!

Jul 01, 2008 | 2001 Kia Sportage

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