Hi everyone,
I made a custom pump for my AAZ (rebuilt the engine, Holset hx27w turbo, and custom pump with a xud9 Citroen engine pump and an 11mm head) and I have some issues with the calibration...
Timing set to 0.91mm, cold start is good, hot start a little bit harder (maybe I have an air leak)
Idle is chaotic,(impossible to set, it goes up and down between 800 rpm and 1200 rpm without touching anything. If I play with the idle screw, I have a "point" where the pump slowly goes from 800 to 1200, impossible to set a 950 rpm.
Off boost, nearly no power. Flat out and wait for it, then the boost comes (at 2500/2800rpm) and the power shows up (Waste Gate spring set to 0.5bar/7PSI for now).
Does anyone have any idea why my idle is so chaotic, and why with no boost I have absolutely no power?
Thanks, and excuse my bad English
did some edits for ya. ORcoaster