How does a fuel pressure regulator and check valve work in a fuel system?
Poor engine start and unstable operation may be due to problems in the fuel system!
The pressure in the fuel rail must be within the specified limits!!! If it does not match, then you need to check:
fuel pump, fuel pressure regulator (FPR), fuel filters.
Detailed video about checking fuel pressure:
• Двигатель плохо запускается.Причина может ...
continued about FPR:
• Двигатель запускается со второго раза.Одна...
By the way!!!! be careful! There are discrepancies in the readings in different repair instructions.
In one they write that the working pressure in the rail is 260 - 320 kPa.
In another instruction, the English version, they write that such a pressure of 260 - 310 should be with the vacuum hose removed.
So be careful!!!
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