Quote:
Originally Posted by rbjtech
My mistake on the pressure reading - the reader doesn't actually show a unit just a number so I assumed it was psi lol, 300 bar, wow that's some pressure.
Let me get the pre-start pressure and cranking pressures.
I read somewhere that the actual 'start' pressure is 250 and anything above this should be good ?
I'm also going to study those TIS links and may replace the HPFP sensor - thanks again guys.
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The point of checking rail pressure with just ignition on i to chech if rail pressure sensor is showing reliable figures. With pumps activated and on normal 4 bar supply pressure the rail pressure is usually 0 but anyways should be below 10 bar.
Rail pressure on start has to raise above 200 bar. Below that injectors can't open. On idle rail pressure is usually a bit over 300 bar. Max full throttle demand for rail pressure is 1350 bar (unless mapped a bit higher - 1500 bar is the max for rail pressure sensor chart).