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Posted on Mar 20, 2017
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Fuel consumption problem

Engine Performance problem 
1998 Nissan Sentra 4 cyl Front Wheel Drive Automatic 131000 miles 

Hi i just want to know how i can improve the fuel economy of my car. i changed the muffler for a sport one and i also had an oil change ls month. My car's engine is a 1.6L 16valve DOHC. intake filter is stock. i am just wondering if i should tinker with the carburetor-looking mechanism where the air filter is atached, coz it seem to have idle control, air control and others, my cousin made adjustments to it some time ago setting the rpm to about 8500/ 9500 with AC. but on my calculations the car is doing like 8km to a liter. please help me out sirs. please inform me if you need more details on my problem. would really appreciate any hel

  • Marvin
    Marvin May 11, 2010

    if there where any fuel control issues the check engine light would be on, the muffler may have made the fuel consumption worse as it changes the system back pressure and flow through the engine, this could cause fuel control issues.

  • Marvin
    Marvin May 11, 2010

    do u have any OBD 2 trouble codes?

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1 Answer

rgbypoet

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  • Expert 166 Answers
  • Posted on Mar 20, 2017
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Change your air filter if it hasn't been changed recently. Spark plugs, plug wires and fuel filter can also make a difference.

5 Related Answers

Anonymous

  • 1263 Answers
  • Posted on Sep 25, 2008

SOURCE: 2000 Nissan Sentra rough idle

a rough idle/high idle is indicative of a malfunctioning TPS(throttle position sensor) this is located on the throttle body ,is attached with (2) screws/bolts to the throttle body housing right off the butterfly shaft. it has either 2 wire or 4 wire plug. the replacement part can be purchased at locale auto parts store. I would also agree that a full service and tuneup be done. this will help with performance and will increase the fuel efficiency. please rate this...thanks

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autodr

autodr

  • 260 Answers
  • Posted on Nov 16, 2008

SOURCE: 2005 nissan sentra fuel filter location ....

the fuel filter is located in the fuel tank and is not serviceable as maintenance. only when fuel pump is serviced

Anonymous

  • 1 Answer
  • Posted on Feb 28, 2009

SOURCE: weired sound in engine arround 2100 rpm, pathfinder 2005

Take a look at Nissan Technical Service Bulletin NTB05-15b. Title = "Rattle Noise From Vias Power Valve Actuator / Intake Manifold Collector" This appears to describe your problem exactly. I have the same problem with my 2005 Xterra and I am going to try the recommended fix myself at home.

regards,
Willyswan

Anonymous

  • 70 Answers
  • Posted on Apr 25, 2009

SOURCE: locate fuel filter on 2007 nissan sentra 2.0 liter engine

its in the gas tank but it doesnt have to be changed!!!YAY

Anonymous

  • 8 Answers
  • Posted on Jun 16, 2009

SOURCE: Nissan Altima 2000 - Engine oil leaking problem.

replace the front oil seal. first i would clean the engine with purple power (degrease etc.) then look at the engine and make sure the leak is not coming from above like possibly the valve cover gasket or from the oil sending unit. try to tighten the bolts on the valve cover and even the oil pan. you never know, you may get lucky. i don't know where you are but front seals are cheap but the labor on the job is what costs you.

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