Quote:
Originally Posted by atfall
Curious about which brand of Sensor you went with. Wondering if it's necessary to go for OEM front sensor vs a 3rd party considering the big difference in cost.
Currently getting 12-13 mpg in the city. Formerly was getting 16+ city 18-20 hwy.
Looking to improve mpg.
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1997 3.4L V6 4WD Limited 4Runner, 185,000 miles. Mostly city driving.
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Typically the OEM Denso brand sensors give the best voltage readings and response rates to the ECU, not to mention they last a very long time. I would suspect the usual culprits if you've lost significant fuel mileage:
New air filter - $15
Clean Mass Air Flow sensor with carb cleaner (focus on the wires inside) - $5
New spark plugs if needed - $25
New spark plug wires - $40
Since you have a 97, a new front Oxygen sensor. They are roughly $50.
Check and fix any cracked hoses and vacuum leaks - $free-$10
Doing these maintenance items should greatly increase your mileage back to where it should be. At 12 MPG, you'll save all your money back and then some in less than a year, possibly in only a few months.
1998 TOYOTA 4RUNNER 3.4L V6 Oxygen (O2) Sensor | RockAuto - link to oxygen sensors for 96-98 4Runners. You'll want to choose the manual or automatic upstream sensor. You can also buy whatever other parts you'll need for very cheap from Rockauto.com such as the spark plugs and plug wires under the Ignition section.
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