Question about 1998 Toyota 4Runner

15 Answers

What is there to tune-up?

Around 11mpg, 124,000 miles. How much of this could be the spark plugs, and what else would you check?

Thank you.

Posted by on

  • 8 more comments 
  • Superboy60 Jun 24, 2008

    Battery has been fine.

  • Superboy60 Jun 24, 2008

    Can you be more specific?

  • Superboy60 Jun 24, 2008

    How would shutting off the O/D and engaging the ECT help mileage? Why not just do it now without trying anything else? What would the vehicle's CPU do to improve things after a tuneup that it can't do now?

  • Superboy60 Jun 24, 2008

    Thanks for the info, but it doesn't address the original question.

  • Superboy60 Jun 24, 2008

    It is an automatic. Earlier someone sugg that I turn OFF the O/D and ENGAGE the ECT.

  • Superboy60 Jun 24, 2008

    The air cleaner and fuel filter were prev replaced. There are no wires because the plugs connect dir to the coils. When you rec an intake cleaner, do you mean something like "Seafoam?"

  • Superboy60 Jun 24, 2008

    Any other opin?

  • Superboy60 Jun 24, 2008

    What would you have included in a tuneup for this vehicle, if you had done it?

  • Superboy60 Jun 24, 2008

    Original question...

  • Superboy60 Jun 24, 2008

    Yes, the key word is "acceptable."

×

15 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 54 Answers

Its may be due to your driving problem

Posted on Jun 24, 2008

  • ashish mittal
    ashish mittal Jun 24, 2008

    www.essortment.com/all/howtotuneaca_revt.htm

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 2,028 Answers

If you're looking to get better gas mileage purchase a different vehicle. The 4runnner is only going to get 22-24 mpg at best for highway. If most of your drive is in town then 11-13 mpg is about right. There are a multitude of things to consider when trying to get better gas mileage from your vehicle, especially a 4 wheel drive. Besides the running performance of the engine, you have to consider tire size, weight, type of driving, driving conditions, front drive shaft. Most importantly keep in mind it's a 4 wheel drive SUV that isn't made for optimum mpg performance.

Posted on Jun 24, 2008

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 44 Answers

It may be becoz of ur drivin conditions the mileage s dropped down...... Can you be more specific?

Posted on Jun 24, 2008

×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 243 Answers

A typical tune up includes spark plugs, air filter, fuel filter, spark plug wires, distributor cap and ignition rotor. That is what id go with typically.

Posted on Jun 24, 2008

  • 4 more comments 
  • Nathan Ayers
    Nathan Ayers Jun 24, 2008

    wait do you think somethings wrong cause of your gas mileage?

  • Nathan Ayers
    Nathan Ayers Jun 24, 2008

    i can further assist you if need be.


    thanks,
    Nate


  • Nathan Ayers
    Nathan Ayers Jun 24, 2008

    A tune up should involve replacing the air filter, replacing or cleaning the spark plugs, and replacing the distributor cap and rotor. A tune up can also include replacement of the spark plug wires, fuel filter, PCV valve, and oxygen sensor.
    That is everything you would change in a tune up. you can also change the egr. Even get some brake clean and clean the sensors. I mean there are alot of factors even the gas you use. Your injectors could be clogged. Try some injector cleaner. I mean theres a million and one things that could effect your gas mileage. Like have you checked the compression of your pistons.
    If you have any other questions please let me know.


  • Nathan Ayers
    Nathan Ayers Jun 24, 2008

    As a ASE certified mechanic Theres no magic tip someone can give unless you check everything and have the information to narrow it down. If you've already done a full tuneup then your problem could be more internal. Also if your taking someone else's words for something being previously fixed. I have a saying Receipts or it didn't happen.

  • Nathan Ayers
    Nathan Ayers Jun 24, 2008

    Have you....
    checked your exhaust for leaks? also check the manifolds.
    Checked your transmission fluid?
    Changed the transmission fluid and filter?
    Reset the computer?
    Cleaned the O2 sensor?
    Cleaned the throttle body and sensor?
    Checked your egr valve?
    Checked your PCV valve?
    Checked for proper Compression?
    Adjusted your timing to proper timing?

    If not start at the top and let me know...


  • Nathan Ayers
    Nathan Ayers Jun 24, 2008

    from what im seeing on google you should be happy your +10 with the formulated gas.....
    now if you see that link and take off a few MPG cause those are
    statistics of a car sitting in a building spinning its tires. Factor in
    wind and everything else your down to 11 mpg. 11-14 mpg seems to be good
    average on google. Dont blame the car, blame the corn. If that dont help get one of 100 aftermarket chip to downtune your car and give you better gas mileage.


    I think you have more then attequate information from all the information that is posted and you have more then a full plate to start with. glad i could provide you all the available options to start with.


    Thanks,
    Nate


×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Toyota Master
  • 2,039 Answers

Lock at our tail pipe is it clean pass our finger in it if it black you have too mush fuel not burning it good but if you did a full tune up that the first step in the morning do you have hesitation maybe dirty injector the stuff some people put in the gaz tank is ok but nothing running the engine with fuel injection cleaner good luck p.s iread some the expert personnelly i hate when customer ask a question like our and get redirect to a web site how to drive our car sorry about that from montreal cheers .pierre

Posted on Jun 24, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,665 Answers
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 198 Answers

Mmay be becoz of ur drivin conditions the mileage s dropped down.... did u chk out the tyre pressure.... is ur car overloaded....r u drivin in top gear or not.... mileage depends on everythin... so please chk everythin properly

Posted on Jun 24, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 121 Answers

If you have already done a turne up and have not noticed any difference in mileage make sure the EGR valve is working and the EGR valve passage is not clogged. Alot of cars build up carbon deposits in this area and even if your EGR valve is working it will not be recirculating the exhaust gas enough. The purpose of the EGR valve is to recirculate the unburned gas from the exhaust and draw it back into the combustion chamber with fresh air and fuel. This will improve your gas mileage because you are richening up the mixture and makeing the ECM call for less fuel. This also cools the combustion chamber and reduces combustion chamber temperatures which will allow for more are. This is one of the most overlooked devices which can greatly decrease gas mileage when not functioning correctly because the ECM will try and make up for the lean condition and call for more fuel. Test the EGR valve with a vacuum pump and make sure it is working. If it is pull it off and make sure the 2 passages are not clogged with carbon. If they are you can usually clear them out with an old coat hanger. I would also take it in to a shop and have them clean the fuel injectors. The way they do it is pull the fuse to your fuel pump and fill a can mixed with gas and sea foam that screws into the schrader valve on your fuel rail. Then they used compressed air to build up fuel pressure and run your car for about 5 minutes on the mixture. This will blow out any debris or corrosion inside and on the tips of the injectors. When the injectors are clean the ECM will have more precise fuel control. Keep me posted. If you have any other questions let me know.

One other thing to remember is when engines get alot of miles on them the clearance between the cylinder walls and piston rings begins to loosen and you dont have as tight of a combustion chamber which will cause compression loss. This can cause a drop in gas mileage the worse and worse it gets. You could run a compression test to rule this out. If you go to most chain auto stores that have a loan a tool program you could rent a compression tester and test each cyilinder. Basically you unplug the spark plug 1 at a time and replace it with the compression tool. Then you start the engine and check the pressure. Turn the engine off and move to the next cylinder. They should all be within 10% of each other.

Thanks - Tech101

Posted on Jun 24, 2008

  • Justin Jun 24, 2008

    What sort of answer are you looking for? You asked for other factors besides the tuneup that could help gas mileage and I offered them. Have you had a chance to check the passages? I see you rated me as thanks for trying, Was my advice not helpful? Is there any other questions that I can answer for you?



    Thanks - Tech101

  • Justin Jun 24, 2008

    Your vehicle does have spark plug wires but they connect to coil packs and not a distributor like older vechicles have. Over time the spark plug wires can build up a high resistance in the wire and can cause the spark plug to not operate at maximum effieciency due to voltage loss. If you have any other questions please feel free to ask.



    Thanks - Tech101

×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 197 Answers

Compression and clean surfaces are key for a vehicle of this age. I'd suggest that you consider an engine internal coring out, if you really want to improve this one. There are no short cuts.

Posted on Jun 24, 2008

  • P.Michael D'Acre
    P.Michael D'Acre Jun 24, 2008

    well, I suppose you can keep milking the experts here until one comes up with a plausible explanation.

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 4,472 Answers

Spark plugs/wires. air filter/ fuel filter. I would also clean out the intake with some intake cleaner.
Do those then let me know.
Thanks,
Lee

Posted on Jun 24, 2008

  • 1 more comment 
  • Lee A.
    Lee A. Jun 24, 2008

    What sort of opinion are you looking for? Have you flushed the transmission? changed the differential fluid? There are a 100 things you could do.
    Keep me posted,
    Lee


  • Lee A.
    Lee A. Jun 24, 2008

    A tune up should involve replacing the air filter, replacing or cleaning the spark plugs, and replacing the distributor cap and rotor. A tune up can also include replacement of the spark plug wires, fuel filter, PCV valve, and oxygen sensor.
    That is everything you would change in a tune up.
    If you have any other questions please let me know.
    Thanks,
    Lee


  • Lee A.
    Lee A. Jun 24, 2008

    You should fine one of these posted solutions more then acceptable. I am not sure what you are looking for? No one can say "open sesame" and all problems are revealed. This is the real world and unfortunately sometimes it takes work to solve a problem.
    You should have found one of the experts posts more then helpful and I am sure they would greatly appreciate it if you could accept and rate appropriately.
    Thanks,
    lee


×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 260 Answers

You are right about one thing. Your gas mileage is too low for your vehicle make and model. Unless you have the 6 Cylinder, 3.4 Liter, Automatic (4 speed). That vehicle averages between 13-15 mpg.
It sounds like you have already done many things to your car to improve mileage. Air filter, spark plug, fuel injectors and tire inflation have a lot to do with it.
I recommend this site for driving tips to help increase fuel economy: http://www.opentravelinfo.com/travel-guide/uncategorized/how-to-save-money-on-gas-29-tips.html

Can you give me more specifics on your engine and transmission?
Thanks,
Ken

Posted on Jun 24, 2008

  • Ken Jones
    Ken Jones Jun 24, 2008

    The average nationwide fuel economy for your vehicle is 14.1 mpg. it ranges from 13 to 15. In California the average mileage drops to 13 with an even lower fuel range of 11.5-14mpg. A lot depends on driving conditions and where you are driving. I think you have already considered all of the relevant solutions and I concur with Benimur.

    Ken

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 638 Answers

The link i will provide you will help you any type of car problems you are facing

for car regarding questions:
http://en.allexperts.com/q/Buick-Olds-773/Ignition-tumbler-replacement.htm

best site for reparing cars
http://www.ptdoityourself.net/tl/tl_indexmain.html

dont forget to rate this solution

Posted on Jun 24, 2008

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 2,071 Answers

Most of the vehicles today need a tune-up every 50,000 to 65 miles depending on driving condition,going to checked air filters ,oil filters. I give you site more information about tune-up..
http://carpros.com/how_to/how_to_tune_up.htm

Posted on Jun 24, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi,

Have you had a major tuneup? Doing so would have your car's computer scanned (OBD code reader) to identify potential problems or failing components that contributes to the 11 mpg. Most components that affect mileage can include: air filter/cleaner, fuel filter, O2 sensors, catalytic converter, timing belt (slack), fuel filter, throttle body mouth, PCV valve, air control valve/throttle position sensor/MAF, idle air control valve and EGR valve. As you can see, quite a number.

A couple of ideas that can perhaps help improve on your mileage after a major tuneup:
1. O/D off;
2. use the
ECT power switch;
3. don't manual override the A/T;
4. A/C off when not necessary;
5. use 87 octane fuel (you can also try a little higher, 89?);
6. no fuel mix;
7. reset the car's CPU so as to learn new your driving habits.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jun 24, 2008

  • Louie  Role
    Louie Role Jun 24, 2008

    Posted were aside from the sparkplugs.



×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 848 Answers

You should check battery and fuse in your car

Posted on Jun 24, 2008

  • gopinath pasupathy Jul 01, 2008

    check the fluid level also check the condition of the all types of valve

  • gopinath pasupathy Jul 01, 2008

    if this doesnot solve your problem take your car to near by service center to get your problem solved

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Show a step by step guide for a tune-up


A tune up consists of replacing the spark plugs and maybe the spark plug wires. Change the air filter too. No need to do timing. It is controlled by the cars computer. Spark plugs should last for about 100,000 miles. Air filters vary on how long they last. Check the air filter at 25,000 miles. Replace it no longer than 50,000 miles. Your car should not need a tune up for a couple more years or so.

Apr 10, 2014 | 2013 Kia Soul

2 Answers

My chevy has about 98000 miles. When is tune up recommended.what is involved in the tune up?


what engine? The fuel filter is in the fuel tank, Spark plugs should be replaced, throttle body cleaned, and the truck generally checked over, battery , belts, brakes, tires ect. Spark plugs, trans fluid, filter, transfer case fluid change, are all due at 100k. You should have the 100K service done. Of course they base that on if you have been following the service schedule. Your owners manual will list all things that are due.

Sep 14, 2011 | 2005 Chevrolet TrailBlazer

1 Answer

What is the difference of a " Tune up" and


A basic tune up on your vehicle is a spark plug change, fuel filter and air filter change. And depending on the miles, timing check,spark plug wires, distributor rotor. Maintenance schedules are listed with your owners manual and other material when the vehicle is sold new, usually maintenance consists of oil and filter change, tire rotation, checking belts and hoses, and many other items for wear and tear, like brake checks, timing belt, these items are checked at specific intervals based on mileage or months. take care and thank you for the question.

Mar 07, 2011 | 2001 Honda Odyssey

2 Answers

Oil around spark plug and car mis fires


The oil around the plug may be a sign that the valve-cover needs a new gasket. Oil on the plugs can cause a misfire but it is important that you check everything over. The misfire could be due to defective wires, boots, coils, spark-plug/s, injector/s, and so much more. Take a look at the cars maintenance history, Maybe it is over due for a complete tune-up or oil change. The car is 11years old, how many miles are on it? How was it running before this?

Apr 29, 2010 | 1999 Lincoln Town Car

2 Answers

How often do you have to tunne up a Venture 2000.


Well you should have a tune up about every 30,000 miles or so and you should change at least spark plugs and spark plug wires,you can also change air filter if needed and fuel filter.

Apr 05, 2010 | 2000 Chevrolet Venture

1 Answer

What is the tune up


basic tune up spark plugs and spark plug wires pcv valve air filter depends on millage check owners manual for proper tune up list depending on amount of miles

Feb 18, 2010 | 2004 Kia Sorento

2 Answers

What all you have to do for a tune up on a 1998 pontiac grand am and about how much should you pay for this?


Fuel filter, PVC, Spark plugs, & plug wires if 50,000 miles or better on the old ones. Check air filter and all fluids. Cost will vary in the area you live in

Jan 16, 2010 | 1996 Pontiac Grand Am

2 Answers

Tune Up


Tune ups - every 30,000 miles
radiator flush - every 10,000 miles.(varies from climate to climate)
trans fluid change - every 9,000 miles.

Feb 25, 2009 | 2007 Mitsubishi Galant SE Sedan

1 Answer

150,000 mile service for a 1999 Pontiac Grand Am SE??


150,000 you should have the brakes checked, check brake lines, tune up (spark plugs, wiers, air filter, ect.) rotate your tiers replace if needed, oil change, be sure to change your cabbin filter to, most people don't know that their car has a cabin filter. The shop should tell you exactly what they would do to it.

If you have any questions E-mail me at TheChazer55@yahoo.com.

Jan 20, 2009 | 1999 Pontiac Grand Am GT

1 Answer

92 toyota celica cranks does'nt start no spark at plugs 124,000 miles


SOunds like the timing belt has broke. To check you can take off distributor cap and turn over engine and see if the rotor turns. If not you have a busted timing belt. Please rate this a fixya if this helps.Thanks!!!

Sep 12, 2008 | 1992 Toyota Celica

Not finding what you are looking for?
1998 Toyota 4Runner Logo

481 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

70346 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6864 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...