Not your normal bosch pump thread

[rryan]

IIRC its got something to do with the internal pump pressure which affects the advance of the pump.

I cant remember exactly how it works, but, when you are criusing it drops the IPP (less advance) and when you put your foot down the IPP jumps up (more advance). Instead of IPP rising with engine speed

i tried tuning the pump with and without the solenoid connected and alway found it went better with and solenoid NOT connected (that was on a 10mm pump)