Quote:
Originally Posted by Sonolin
So, TL;DR a healthy car should have this "dip" in fuel pressure as shown here, when going WOT. The dip should then rise, and level off. Otherwise, if your car is running unhealthy (which apparently would be a fuel pump issue), it will instead have a "wave" up & down of the fuel pressure.
Is that correct?
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There is nothing wrong with this DI pump graph imho. the vertical line is at 1900 rpm, by the time we get to the torque dip the fuel pump is stead as a rock.
I think some are afraid to back track their hypothesis after seeing the data.
I good engineer is never afraid to admit when he is wrong, part of step to finding the solution.
I was going to say we don't have a problem its just engine noise, but in the other forum there are quite a few broken camshafts with totaled engines.