1995 Hyundai Accent Engine/ AC PROBLEMS

119,000 MILES • 4 CYL • 2WD • AUTOMATIC
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STBEN1
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My car runs very rough and it's MPG is really poor. Once the gas goes below half, the car begins to jerk and sputter as if going out of gas and sometimes stops completely as if there is no power. When i fill the tank up it stops but consumes the gas within a short while and runs really rough while idling. I have changed the plugs and the wires. But the problem still persists.

The oil also magically disappear. There is no leak in my car but it just goes dry after a while without the indicator coming on

And once i switch on the AC the car dies or it cannot accelerate as much as before. I will appreciate any diagnosis i can get.
Jul 29, 2008 at 2:14 PM
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CALYPSO93
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Sounds like there are multiple problems. If the oil is disappearing, and there are no leaks, it probably means that the piston rings are worn, and it's burning the oil. Look at the exhaust when it's running, and if it looks blue, thats a sure sign. If your burning oil, it will ruin the oxygen sensors, which the computer needs to read in order to adjust how much fuel to put in the engine. When you turn the air conditioning on, it puts a load on the engine, and you will notice it seems sluggish. I would start with a compression test/or leak down test to determine the state of the engine, followed by the timing, fuel pressure, etc.
Jul 30, 2008 at 1:48 PM
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