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Old 10-16-2008   #1 (permalink)
2002MustangGT is offline Apprentice

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Default Terrible Gas Mileage Question?

well guys, recently when i filled up i got 135 miles to the last tank of gas, and i just filled up again and ive burned half a tank and only went 45 miles? im not sure whats going on with it? i was getting more like 225 to a tank? i dont know if it is just bad gas or what? any Suggestions would be great?
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Old 10-16-2008   #2 (permalink)
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Originally Posted by 2002MustangGT View Post
well guys, recently when i filled up i got 135 miles to the last tank of gas, and i just filled up again and ive burned half a tank and only went 45 miles? im not sure whats going on with it? i was getting more like 225 to a tank? i dont know if it is just bad gas or what? any Suggestions would be great?
You have a 15.4 gallon gas tank so if you got 45 miles from 7.7 gallons of fuel, you have a big ass problem on your hands. The fuel loss is so ridiculous that I'm thinking you have a cracked fuel line or some other fuel leak. If you can't find any fuel leaks then drive your car until the fuel gauge says your empty and fill it all the way up to see how many gallons it takes. if you can't pump all 15 gallons in when your gauge says empty, this would tell you that you have a faulty sending unit (inacurate fuel gauge)
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Old 10-16-2008   #3 (permalink)
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your prob leaking fuel, check the rubber grommet for the fuel filler pipe for cracks and check the filler pipe too, seen alot of problems outta' both lately
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Old 10-16-2008   #4 (permalink)
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ill check it, but i had the car on the lift the other day and i was looking while i was changing my oil and i didnt see any thing. but ill look again thanks, i dont know i gotta figure somthing out though
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Old 10-16-2008   #5 (permalink)
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Are you smelling raw gas?

I like dakine858's suggestion of running it until the gauge reads empty and then see if you can get 15 gallons in it.

Unless you are smelling gas all the time, I doubt there is a leak. Are you noticing any changes in the performance? Is it acting sluggish?



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Old 10-16-2008   #6 (permalink)
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Default Can you say Gas Bandit.

You might want to get a locking gas cap. Just a thought.
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Old 10-16-2008   #7 (permalink)
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check out the fuel filter. But still that some helleshius mileage.
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Old 10-16-2008   #8 (permalink)
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no i dont smell any gas and i just checked again and i didnt see any leaks or anything, so im gonna run this tank out and then see how many gallons i can get in it, cause i want to get this fixed lol thanks guys
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Old 10-16-2008   #9 (permalink)
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Originally Posted by huntcar777 View Post
You might want to get a locking gas cap. Just a thought.
^ +1 That's a good call.
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Old 10-16-2008   #10 (permalink)
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That's some amazingly bad mileage, like above I'd look for a leak, if you can put it on a lift do it with the engine running so you know the system is pressurized. Other than a leak, make sure the O2 sensors are good and oem ford, the O2's control the fuel mixture and bad mileage often indicates a problem with one or more of them.
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Old 10-16-2008   #11 (permalink)
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ill put it on the lift with it running and see what i can find out. thanks for the input, i know its terrible lol
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Old 10-16-2008   #12 (permalink)
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No need to put it on the lift with it running. Just put the key in on but engine not started. That will pressurize the system and keep it at operating pressure.
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Old 10-17-2008   #13 (permalink)
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Quote:
Originally Posted by dakine858 View Post
^ +1 That's a good call.
+1+1+1 on the gas cap call.
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