BIG PROBLEM: Im only getting 8 MPG. I need HELP!!!!
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The check engine light works fine. It comes on when I turn on the engine for the first few seconds and Ive got an entire led setup so it is super bright. Im still playing with it all. I checked the exhaust and nothing smells out of the ordinary. I have noticed a very low idle if that helps any in diagnosing it.
Have you checked for a fuel line or gas tank leak yet? At 8 mpg I would really expect the exhaust to smell rich like gas. (Is there any chance someone else has been "using" your gas without you knowing? Reset the tripometer and put baby powder on the gas cap/cover to alert you to tampering).
If all of the above checks out ok, the next thing I'd do is pull the plugs and to see what they look like (take pictures and post them, nothing the cylinder numbers). While you're at it check that you have a clean air filter and a O2 sensor (check visually, are you running an oiled air filter?).
You can also take a multimeter and check the resistance of the spark plug wires while you're at it. Write down the resistance of each wire in Ohms and then divide that number by the length of the wire. They should all be within 5-10% of each other. If not, replace them.
Running low at idle is interesting. Sounds like there's a restriction somewhere (intake or exhaust), the ECU is getting a bad airflow reading, or you're getting incomplete combustion in a cylinder.
When is the last time the fuel and air filter were replaced?
#29
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#31
Well. Im sorry that not everyone is a super genius like you! Wow you should be on the board of directors at some major university. You must be the smartest man alive. I cant believe they havent written a book about the smart *** who tells everyone else that they should know how to calculate gas mileage when it really hasent mattered to them before this.
Did these problems all of a sudden start happening? Or you never checked mileage before? or....?
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WOW....don't be an *******. You never told us exactly HOW you were calculating it even though it was asked a couple times. As I said before, your speedo is off somewhere around 10%. I don't know exactly how far off it is because I don't know your stock tire size and your current size(33" you said).....figure out how far off you are, multiply that by trip meter at fill up, divide by gallons to fill, done. It's the most accurate you can get. It's stupid easy as hell. 08xlt4x4 is correct.
Did these problems all of a sudden start happening? Or you never checked mileage before? or....?
Did these problems all of a sudden start happening? Or you never checked mileage before? or....?
So quite frankly for you to get pissed at someone who gives you the methodology for actually calculating the MPG properly (your method seems a little bit sketchy) seems a bit rude your part. Don't bite the hand that feeds you so to speak.
#33
maybe your neighbor is siphoning gas at night!
first off, do the proper calculation for you fuel economy so you have a solid starting point, including compensating for tire size. don't assume anything. don't get mad when someone is trying to help you, take the help gracefully.
if you don't know when the plugs were done, they're questionable at best. change them.
perhaps your fuel pump is on the way out. get the fuel pressure checked.
first off, do the proper calculation for you fuel economy so you have a solid starting point, including compensating for tire size. don't assume anything. don't get mad when someone is trying to help you, take the help gracefully.
if you don't know when the plugs were done, they're questionable at best. change them.
perhaps your fuel pump is on the way out. get the fuel pressure checked.
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