Adjusting Fuel Curve

[Bruce Plecan]

-----Original Message-----
From: John Wickerham <ibeme at glasscity.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Tuesday, August 18, 1998 12:23 PM
Subject: Adjusting Fuel Curve


>Couldn't find the answer to this in the archives, so I will
>address the list.
>
>How can you on a Speed Density system move the entire fuel
>curve up or down?  I have a Blazer with a 4.3 Liter V6, TBI
>system.  Can the fuel curve be adjusted up or down by making
>changes to the MAP or TPS or other sensors?  Or is this
>something that can only be done by modifying the data stored
>in the ECU chip?

Raising the fuel pressure will do that.  However, rarely would it be wrong
the same amount everywhere, so a better solution is figuring
out where it's rich/lean, and correct the fuel map.

Adjustable fuel regulators are available for that, ie Jegs Summit.
Cheers
Bruce
>
>Thanks,
>John Wickerham
>
>