30-08-2012, 03:16 PM
Deffo gonna be hardware related then.
Odd.
Maybe one of the injectors is faulty and working against the FPR... the pump is just a pump really, and can't do anything about rail pressure in itself, it just spins and pumps hehe... the FPR is what does all the work really.
So unless the pump is pumping TOO much for the FPR to cope with, but I find that hard to believe.
Ooooor, the rail sensor is dicky and is reading too high.
Does the FPR duty cycle % sit too high generally vs a standard car... that will be what gives you an indication of some things.
It's kinda good that it's hardware though, makes life easier. It's just a case of being methodical and looking at the PP readouts to try work out what bit of hardware is causing issues I guess...
Does it idle ok when it is running? Ie, all the injectors are working and it's running smoothly. If they are all working then the only things left are pump/FPR, and since the pump is pretty inert in all this (engine speed is only input really), then the FPR is logically still what isn't right...
That said, it might ALL be working ok, and the rail sensor might just be telling the engine lies...
Hmmmm, hehe, tough one but interesting to work it out
Dave
Odd.
Maybe one of the injectors is faulty and working against the FPR... the pump is just a pump really, and can't do anything about rail pressure in itself, it just spins and pumps hehe... the FPR is what does all the work really.
So unless the pump is pumping TOO much for the FPR to cope with, but I find that hard to believe.
Ooooor, the rail sensor is dicky and is reading too high.
Does the FPR duty cycle % sit too high generally vs a standard car... that will be what gives you an indication of some things.
It's kinda good that it's hardware though, makes life easier. It's just a case of being methodical and looking at the PP readouts to try work out what bit of hardware is causing issues I guess...
Does it idle ok when it is running? Ie, all the injectors are working and it's running smoothly. If they are all working then the only things left are pump/FPR, and since the pump is pretty inert in all this (engine speed is only input really), then the FPR is logically still what isn't right...
That said, it might ALL be working ok, and the rail sensor might just be telling the engine lies...
Hmmmm, hehe, tough one but interesting to work it out
Dave
