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1989 Corsica fuel mileage
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96explorer
User
Apr 23, 2006, 7:53 AM
Post #1 of 6
(1796 views)
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1989 Corsica fuel mileage
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Last fall I had a bunch of work done on my '89 Corsica. I had a new fuel tank, lines, filter, pump, fuel sending unit/gauge and fuel regulator installed (oh what Minnesota winters won't do to a car!!) Needless to say there was some serious corrosion to these parts (with the exception of the regulator). I noticed when I got the car back that when I fill the tank the needle stops right at the last line on the gauge when it used to go past the "F". No big deal there I can adjust to that. I experimented with it to see if the gas mileage was any better. I let the needle go down as far as I dare let it. Normally I would fill the tank if the needle was at 1/4. Given the change in the sending unit/gauge I figured it was just "set" different so I let it run down more than I normally would. I let it go down to the last line on the fuel gauge. I put in between 9-10 gallons, which is par to what I have normally pumped. Prior to having all this work done I was getting about 350-360 MPG. Now I am getting around 250!! Either I am way off and not estimating correctly with the new "setting" of the newly installed fuel sending unit/gauge or something else is amiss. Any ideas?
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 23, 2006, 9:10 AM
Post #2 of 6
(1794 views)
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Re: 1989 Corsica fuel mileage
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I know you meant miles per tank. Take you mileage based on a few fill ups not just one. Add up the miles and keep track of the gallons. Sometimes a different pump will shut off early or late and a couple gallons will throw you way off. The repairs you mentioned shouldn't be the problem.
FYI don't gas get too low as the fuel pump is cooled by the gas and won't last as long. T
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96explorer
User
Apr 24, 2006, 3:31 PM
Post #3 of 6
(1790 views)
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Re: 1989 Corsica fuel mileage
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 Oops!! Yeah..........350 miles per gallon would be something, huh? I would have the oil companies swiping my car and wanting to know how that was happening!!!
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 26, 2006, 4:51 AM
Post #4 of 6
(1784 views)
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Re: 1989 Corsica fuel mileage
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Laugh! If you can make a vehicle get 350 MPGs YOU will make Bill Gates the second richest person in the world.
Let us know how you are making out. We'll try harder if this mileage problem is for real for some ideas. Bear with it. We try but you know this is only a keyboard. If vehicle isn't running well I suggest you get some help soon or you may cause more problems. T
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96explorer
User
Apr 27, 2006, 6:17 PM
Post #5 of 6
(1772 views)
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Re: 1989 Corsica fuel mileage
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 Yep......I just filled up and wrote down the #number of gallons I pumped into the car. I am keeping track of the mileage for this tank and will probably do that for several tanks and see what I can come up with.
BTW............I am taking the Explorer in and having the catalytic converter looked at. A friend of my dads is a Ford mechanic and he though there might be something with the converter that is causing the slow read for the O2 sensor. He thinks it may be the converter is plugged up and that may be causing the engine to run rough after it is warmed. We shall see what happens. I will keep you posted...................
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 27, 2006, 9:24 PM
Post #6 of 6
(1771 views)
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Re: 1989 Corsica fuel mileage
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Manifold Actual Pressure can tell of a restriction in the exhaust system. That's also called MAP which is actually vacuum readings and I'll help but it's a book to understand.
In short -- most engines will run at about 18 vacuum and be the same at 2,000 RPMs with no load. If not something is wrong. Best I can do without your vehicle in front of me. I'm pretty good at using vacuum testing as a diagnostic way. It's a book like I said but I'll try if you need more help. T
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