Thread: P0300-P0306
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      08-11-2020, 12:08 PM   #8
drocket77
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Drives: 2004 BMW Z4
Join Date: Nov 2019
Location: Delaware

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I just did some pressure testing on the fuel system. Fuel rail after starting the car for 10 seconds was 52psi. I waited 10 minutes and checked again, and it dropped to 46.

I was waiting for my new ram to come, cause my laptop is stuggling to do anything these days. 2gb on W10, and takes 2 minutes just to open INPA, let alone trying to open ISTA. I know with ISTA, I will get a better view of what actually going on.


If in fact if it is the injectors, I am just gonna buy new ones, good luck to get into any reputable shop within 25 miles. They are booked 3 weeks out. After I install them, wont I have to use INPA to input the new values.

I am reading different vehicle BB's, and most are saying it should hold steady for at least an hour. And then its should start gradually decreasing pressure. I think now the easiest to start with is FPR, then to the tank and sending unit and filter. I think my scanner has a section I can do a ventilation check, so I will do that one also.

Last edited by drocket77; 08-11-2020 at 12:18 PM..
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