High pressure fuel pump
Is it possible that flooring the gas pedal causes a huge amount of gas gushing into the pump which in return has small ports and needed to be wider???!!!!
I just want to know whether the issue is electrical or mechanical inside the pump. Like I have said before, the limp mode happened once and I do not know whether my tapping on the pump with a small hammer had to do anything with fixing it. I assume and probably wrong that the pump similar to the starter where sometimes had to be whipped a little in order for it to work again.
Nevertheless if the limp happens again, I will have to remove the pump, take it apart and then explore it and see if I can find the culprit within the pump.




Is it possible that flooring the gas pedal causes a huge amount of gas gushing into the pump which in return has small ports and needed to be wider???!!!!
I just want to know whether the issue is electrical or mechanical inside the pump. Like I have said before, the limp mode happened once and I do not know whether my tapping on the pump with a small hammer had to do anything with fixing it. I assume and probably wrong that the pump similar to the starter where sometimes had to be whipped a little in order for it to work again.
Nevertheless if the limp happens again, I will have to remove the pump, take it apart and then explore it and see if I can find the culprit within the pump.
Your posts on your restoration will be valuable resources.
The HPFP is mostly mechanical. It’s driven by the camshaft. It doesn’t control how much fuel the engine gets; it just provides the high pressure the injectors need to function. The amount of fuel the engine gets is determined by the ECU signal to the injectors with throttle position and other sensors as input.
The HPFPs currently available are rebuilt, so there must be replaceable parts inside. But I have never seen anything on the internet about doing it.


