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Re: 98 WINDSTART LOW OIL PREASURE 3.8L
This may be just the oil pressure sending unit, if the engine has actual low oil press then it will be noisy, clattering and knocking noise's, if it sounds ok then just change the sending unit, it is a common failure on Fords.
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Lets review. Replacing the head at 250k was probably not a good investment. My advice has always been, if you need engine work at 200k or more, its
time for another vehicle because the rest of the parts are still worn
out. The normal life of a car or truck in the USA is 200k.
Usually a knocking sound means a rod or main bearing has failed. Which would require an engine overhaul to fix. Black oil has nothing to do with the pump. The oil should be changed at 500 miles to remove any debris caused by replacing the head. That may fix the problem if there is junk floating around in the oil pan. If the oil pump has failed, you would have very low oil pressure which would show up on a gauge. It could cost you more to fix the knock that it did to replace the head.
Go back to where you got the work done if you can.If not then i would get the oil preasure checked as the low light tells me the preasure is below 8 psi and the ticking is from the lash adjustors at the tappets verifys low preasure too.
check fuel preasure i have seen fuel pumps go bad for no reason listen to the gas tank for the pump to come you should here it also i think some of them came with 2 fuel pumps 1 in the tank an 1 on the frame rail check it also if it has 2, also check fuel pump relay
It could be a faulty oil sending unit, but it would be advisable to have the oil preasure checked with a mechanical guage to determine if it is a sending unit or low oil preasure. Oil preasure low enough to allow the light to come on is low enough to possibly cause major engine damage.
Changing oil can't hurt. When was the last time you had it changes?How many miles on that engine?Changing approximately ever 3,000 miles is common practice. The engine oil light and the automatic transmission are two seperate problems.
Engine oil light come on because the sensor reads a low oil preasure.If the engine is not worn then the light can be caused by the sensor getting cloged up (from dirty oil ) and not reading the preasure correctly.