2000 Toyota Landcruiser Gas mileage

2000 TOYOTA LANDCRUISER
234,673 MILES
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FDS970
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Okay I just changed my coil packs and spark plugs a week ago. I drove 120 miles and I used three quartes of a tank of gas what could that be. I never had that problem till now. I also wondering why it runs about 2200 rpm at 70 mph
Sep 8, 2013 at 5:15 PM
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JACOBANDNICKOLAS
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As far as the RPM's, that sounds about normal. However, the fuel consumption doesn't. Have you checked everywhere for leaks? Is the air filter clean?
Sep 8, 2013 at 6:08 PM
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FDS970
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Yes air filter is clean. Brand new along with the oil change that went along with the tune up. When I take my gas cap off it makes a huge sucking sound. I was thinking a vaccume line. I have had many thoughts like egr are the oxy sensor
Sep 8, 2013 at 6:22 PM
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JACOBANDNICKOLAS
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That is normal for the fuel tank to release pressure when you remove the fuel cap. Has the check engine light ever come on? There are so many sensors that can cause this type of an issue, but without the light, it becomes a guessing game.
Sep 8, 2013 at 6:33 PM
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FDS970
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Yes my number one coil pack threw the light on so that's y I did the tune up. But after that the light has been off. Would resetting the computer help it cause I do rember they didn't delete that code that made the engine light come on it just went off after a couple days. I don't mean to sound crazy but three quarters of a tank in 120 miles that ain't right
Sep 8, 2013 at 7:06 PM
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FDS970
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Where should I start on this guessing part
Sep 8, 2013 at 7:10 PM
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JACOBANDNICKOLAS
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I think I would start by checking the O2 sensors to make sure they are responding properly. You will need a real time scanner.
Sep 9, 2013 at 10:33 AM
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