^^Fuel pressure is determined by your map. Increased pressure is requested when you increase load on the engine (ie put your foot down), and the pressure is adjusted as per the request. You can see the differences by logging on VCDS.Generally at idle and light acceleration fuel pressure is low(er), and raises as you increase load with the accelerator pedal .The fuel pump has a chamber which is filled with fuel and compressed by a piston which is powered by the follower. The higher pressure required means more fuel in the chamber to pressurise which takes more force to pressurise which in turn means more pressure on your follower.
Little update whilst waiting for parts to arrive. I thought i may as well change the hpfp internals. Never done one before so i just downloaded the one from autotech. Now, looking at the new pump im thinking to myself where the fook do the collats go. Hmmmm lets see. Looks as if my cam has chewed the fecker up along with the spring retainer .A quick pic with old at the side of new.Notice how much of the fp it has eaten away.
Have you not seen the pic on page 1 ???
/\/\/\/\I see the the end of the push rod had actually been running on the cam itself .... surprised it actually managed to make any fuel pressure at all..
Quote from: ARV_90 on January 25, 2013, 05:51:43 pm/\/\/\/\I see the the end of the push rod had actually been running on the cam itself .... surprised it actually managed to make any fuel pressure at all..I think the main fault was low fuel pressure and going into limp mode.
Two revisions on the cam, the earlier A one that has "soft" lobes and the more robust and later B one.
Quote from: bacillus on January 25, 2013, 07:13:56 pmTwo revisions on the cam, the earlier A one that has "soft" lobes and the more robust and later B one.I see, and at what year did the rev B appear.
can this wear happen in a standard car? i,ve had my 06 gti for 7 months now and i love it ! but all the probs i,ve been reading about on here makes me think have i bought the rite car ?