I havea 99 model xr250, latly it seems to of been chewing a fare bit of oil, its been running ok other than that though, i took it out riding, anyways, going along about third gear, and it started buzzing kind of, and i startd losing a bit of power, i then started slowing down, but the engine died before i could come to a halt, looking around theres no visible damage, although, compression seems to be a little less. old man recons to check the oil and make sure its not making metal, was wondering what worst case scenario could be, and how much to fix it. thanks
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Of course it could be a wiring problem or something in the cluster. The light and the gauge are grounded thru their sending units, both get power from the same source. You could have a problem with the oil pressure and the engine temp, or not. I would probably replace the oil pressure sensor and the engine temp sensor to subtract them from the list of possible causes. If the problem is still happening, I would have someone check the instrument cluster.
Sounds like one of two possible problems. 1.) You have overfilled the oil level. 2.) You have a faulty oil pump.
The 98 xr250 is a dry sump model and the oil pump, pumps oil back to the frame/tank (oil in frame).If you have too much oil in your system the oil tank overflows back into the engine the excess oil can affect the internal pressure in the engine this can cause some of the excess to be vented through the crank case breather. A more severe and urgent problem could be a failure of the oil pump to return oil to the tank , this could lead to severe engine damage as your oil system could be starved. Firstly drain all your oil and measure what comes out , should be no more than 1.4 litres, if you have more you have found the problem !! If the amount of oil is correct, then i am afraid you will have to open the engine and have the oil pump / lubrication system examined / replaced by a professional. Hope this helps
DON'T BE ALARMED..IF OIL LOOKS OK AND NO OBVIOUS LEAKS OR RUNNING PROBLEMS..THIS WAS COMMON ON 4.7 MODELS..THE HOUSING WHERE THE OIL CAP IS FOUND RUNS A BIT COOLER THAN THE REST OF OF ENGINE AND CAUSES THIS MOISTURE/BUILDUP TO OCCUR..KEEP AN EYE ON FLUID LEVELS..AN O2 SENSOR IS A COMMON PROBLEM ON MOST VEHICLES AS WELL..I HOPE THIS HELPS
The code P0336 is crank shaft sensor performance code.The sensor could be faulty and not picking up a good signal.The after erasing the code,the problem still exists ,so it is then a pending code and when you shut the car off and restart it the code reappears.Just another idea here ,if you have not had a tune-up recently(plugs,wires,airfilter,etc.)you could get unwanted codes and your engine will not perform as it should.This could cause poor gas mileage as well.John.