There have three factors may be cause the problem,
1.The filter is a source for low fuel pressure, because it is stoped up or is cloged.
2. The fuel pressure regulator is another.
3. The pump itself.
Tech 2 software
I've come to the conclusion that the fuel pump is breaking down because it performs better when the vehicle is cool, after running the pump in some diesel oil within three minutes the the body of the pump is very hot and the pump was being submerged in the fuel. I have not replaced the pump as yet but I have tried a regular pump but the supply from it is much different because the diesel oil is much heavier than gasoline. Thanks again.
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I have a 2007 Santa Fe, I changed the diesel filter and because it did not start because it was started and I increased the acceleration, the engine shuts off Checked on the computer p1186 / p0087
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