Fuel Pressure Issue
10-31-2005, 06:07 PM
#21
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Join Date: May 2002
Location: California
Posts: 22,465
Originally Posted by ColinRX7' post='774326' date='Oct 31 2005, 03:41 PM
Fuel injectors work the same no matter the fuel pressure, so if your pressure is lower, and the injector opens for a millisecond, it's just squirting in less fuel than if the pressure was doubled
Sounds to me like you should increase the pressure and back off the injectors. You base map for idling is too rich at the proper pressure. So, if the pressure drops, and you haven't touched the fuel map, it will be closer to the proper ratio, so it idles better.
the whole idea behind a fuel pressure regulator is to keep the relative pressure the same between the intake and the fuel rail.
11-01-2005, 11:41 AM
#23
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Join Date: May 2002
Location: California
Posts: 22,465
Originally Posted by ColinRX7' post='774370' date='Oct 31 2005, 07:15 PM
Hmm well I'm all backwards then
You understand what I'm getting at though right?
I wasn't thinking with the intake pressure input, I was picturing an aftermarket adjustable FPR with no vacuum input..
ah ok, like my mercedes.
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