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Old Nov 5, 2019 | 11:25 AM
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Default Fuel mileage

Hey all,

I hate to post this because I know that there are a lot of variable but I need some help. My 2000 Limited with 135k is just not getting the mileage I think it should. I have had it since March. According to my calculations I am averaging 16.7mpg since I bought it. My best was 19.7 & worst was 14.9. I drive mostly rural roads. The car runs good, has all fluids up to date, new plugs & wires, thermostat, tires are in good shape which are kept at 33psi. Also the plugs I took out looked OK. I have a OBD2 adapter & Torque pro but not really sure what to look for. Thanks.

Pat
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Old Nov 5, 2019 | 11:57 AM
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Look at the fuel trims.
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Old Nov 5, 2019 | 12:01 PM
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Originally Posted by carfixer007
Look at the fuel trims.
That is what I am going to do today. Reading about how to do that right now. My understanding is check at idle & 2500rpm.
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Old Nov 5, 2019 | 01:24 PM
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So I took a ride & got some fuel trim measurements. Hope I did this right. First one is at idle after a 12 mile ride at 60mph. The second is at cruising speed.
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Old Nov 5, 2019 | 01:27 PM
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Sorry, Not letting me attach images. First image showed:

-9.4 LTF1
+2.34 STF1

Second image showed:

-4.7 LTF1
+1.56 STF1
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Old Nov 5, 2019 | 02:53 PM
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How many miles on the spark plugs?
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Old Nov 5, 2019 | 03:08 PM
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Originally Posted by CathedralCub
How many miles on the spark plugs?
Just changed them & the wires about 200 miles ago. Used AC wires & plugs. Old ones looked tan but no soot.
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Old Nov 5, 2019 | 07:28 PM
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It'* controlling fuel OK. Is compression good?
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Old Nov 5, 2019 | 08:25 PM
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Originally Posted by carfixer007
It'* controlling fuel OK. Is compression good?
Haven't checked. Guess that'* next. If I was smart I would have checked while doing the plugs & wires. I have never been accused of being smart.
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Old Nov 5, 2019 | 10:02 PM
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Originally Posted by patcal096
Haven't checked. Guess that'* next. If I was smart I would have checked while doing the plugs & wires. I have never been accused of being smart.
LOL.....
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