Quote:
Originally Posted by Pantera EFI
My EMS, ECU-882C-x, has the MAP AND BAROmetric sensors (two seperate) mounted onto the circuit board.
"BOTH 100% FULL TIME"
The "quest" from the coast to Lake Tahoe (9000') is quite common for, boats, buggies, and cars.
What was found:
The fuel pressure regulator's "baro" reference point determined the correction slope direction.
When the regulator was referenced to manifold pressure,
the slope direction would allow for LESS of the "fuel multiplier" object.
When the regulator was referenced to atmosphere (air),
the slope direction would allow for MORE of the "fuel multipier" object.
Lance
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Agreed Lance, I've made this observation as well. How the FPR is referenced does play into the necessary fueling corrections. I neglected to ask or mention the effects of FPR reference point in my old post.
I just find it rather sad that most of the "mainstream" boxes (including my older FAST) have no barometric compensation capability... because real world cars seldom drive at a steady altitude all the time and how a feature this critical to "jump in and go" capability could have been overlooked or omitted is a HUGE oversight!
In a relatively "flat" state like Missouri the lack of barometric compensation is not a
huge problem, but in my case I can go from sea level to 9000' over a 2.5 hour drive and it can be a real issue!