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Old Jan 16, 2011 | 12:08 AM
  #1  
2001-CamaroSS-LS1's Avatar
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From: Havertown, PA
Default Need some help!

this is an engine related question..everyone on this site seems to kno their ****..i cant seem to get anything from the dumba..'s over at toyota-4runner.org...so my problem is...my 2004 4runner v6 used to get 17-19 mpgs and 390 miles on a full tank of gas..now its getting like 11-13 mpgs and like 282 miles to a full tank....what the hell is the problem? i kno this isnt the right site for this but i need some help from decent people like you guys!

thanks for the help in advance!!
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Old Jan 16, 2011 | 01:03 AM
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tune up. filters, plugs, wires all this help. even a bad or clogged cat can lower your mpg. so there are variety of things.
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Old Jan 16, 2011 | 08:27 AM
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O2 sensors as well as the above items
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Old Jan 16, 2011 | 08:38 AM
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Fuel system cleaning would be my suggestion along with the stuff said above.
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Old Jan 16, 2011 | 08:43 AM
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i have done some testing with multiple vehicles for fuel economy. i would record fuel economy and what i found out is that the temperature has a lot to do with it. i would average the highest (41 mpg) in 65-75 degree weather and in the same driving conditions but temperature in the 10-30 degree range i would drop to around (36/37 mpg) that was in my saturn sl1 5 spd. (it was called the slow one). other than that it might need a tune up. check everything like the air filter, oil if needed to be changed, spark plugs wires, pcv valve etc.
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Old Jan 16, 2011 | 12:49 PM
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Winter blend fuel causes my Toyota truck to drop 2-4mpg consistently each year when the gas stations start pumping it.

Also doesn't help that I start it up and let it idle 2-3 minutes every day before i drive off.
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Old Jan 16, 2011 | 01:35 PM
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check into every thing mentioned above great advice,and consider doing a compression check.
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