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Since changing tire size from 265-65-17 to 265-70-17 my gas mileage has dropped 1.5 to 2 mpg. i am running 35 psi in all 4 tires. i have also changed to a k&n air filter to try and help matters but nothing seems to help. do i need to reset my computer? i would appreciate any help that you might have in getting my mpg back to where they were.

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Posted on Jan 02, 2017

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SOURCE: getting terrible gas milage. only 25 mpg!!

Shouldn't be spark plugs unless you are at about 100,000 miles or more because on your vehicle you have platnum plugs and aren't required to be changed until every 100,000 miles. One thing i would recommend is to have your car sea foamed. See if your local dealer does this, otherwise find someone in your area that does this service. This product, Sea Foam, is a great product that will break down the built up carbon deposits and clean out your intake manifold and head from these deposits. Along with this get the throttle plate service done as well. All this should help with your gas milage and help the motor to run better and even idle better. Hope this helps

Posted on Nov 12, 2008

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SOURCE: '02 pathfinder came with 245/65/17 tires.can i put 265/65/17 on?

That Mechanic doesn't know what he is talking about 245/65/27 are the orignal size of tire for a 2002 pathfinder. Good Luck

Posted on Dec 09, 2008

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SOURCE: Changing the tire size on a 2007 Nissan Pathfinder

Go with the 265/75/16, they are the same as the Off Road Pathfinder. If you shop around, you can find them for alot less than the original size price. Be sure to find a good all season tire with a good treadwear rating.

Posted on Dec 21, 2008

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SOURCE: gas mileage drop

It is not the fuel pump if you hear it when you turn the key. you will hear a whirring noise. that's the fuel pump.A fuel pump will usually go out suddenly. Could be you need spark plugs if you replaced the wires. Always be sure to properly gap the spark plugs with a small guage you can buy for a couple dollars or could add fuel injector cleaner to your tank just to make sure. The fuel filter (need only one) run from $30-36 dollars. the air filters cost about $16-17 dollars. go to Amazon .com to get an idea of the prices. he reason the needle on the fuel gauage goes down is that with a 1/4 tank the gas inside the tank moves and the electric guage float moves as you turn.With more gas you will not see that too often.Is it a 2 wheel drive or 4 wheel drive ? The 4 wheel drives use more gas. You can go to toyotanation dot com to find any thing toyota related.Clean the IAC Valve (idle control valve) just inside where you remove the duct work from the air filter.Spray it with brake cleaner or carburator cleaner towards the fuel system. With the engine running at about 1200 rpms.Do this several times, you can see the valve inside. It can also be removed and cleaned. they get full of gunk and oil residue.I don't think the 97 has cabin air filters.Only the air is not as bad as you think. Hope this helps you out.

Posted on Dec 27, 2008

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SOURCE: Location of the PVC and gas filter on 4 cylinder 2003 Solara

The PCV and the fuel filter replacements are not going to increase you fuel mileage. What you should really consider is getting some good fuel injection cleaner into the tank, and get an "induction system cleaning". Those two items alone will address most of your mileage issues. The PCV does nothing for mileage, nor does the fuel filter. Also, for maximum fuel mileage, you should have the correct sparkplugs from Toyota in your car. "Aftermarket" plugs doe not perform very well at all.

Posted on Jan 10, 2009

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