Fuel pressure reg/EGO Qs

[Andy Wyatt]

Hey y'all

Could someone please explain to me:

1. Why do they have fuel pressure regulators manifold pressure referenced?
Why don't they just take this into account in the fuel map? Is it so that
the injectors are open longer at idle, improving trimmability and hence idle
quality?

2. Has anyone tried to use a standard EGO sensor to tune an engine? I'm
currently trying it, but it has so much hysteresis that it isn't working.
How do factory ECUs do closed loop control, esp at idle?

Cheers
Andy W :-D

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