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Re: Stock CIS, running out of gas at 2 bar?
- To: orin@WOLFENET.com (IPM Return requested)
- Subject: Re: Stock CIS, running out of gas at 2 bar?
- From: Russell S Southerlin <Russell.S.Southerlin@lmco.com>
- Date: Fri, 24 Oct 1997 08:46:54 -0600
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After I posted that response I did remember that I forgot about the full
throttle switch and was wondering if someone would know how it comes into
play - good catch.
One question, if my computer uses this air plate position to calculated
miles per gallon I wonder if you could calibrate (maybe add an adjustment
pot or resistor) it to give the correct value - mine is always about 4-6
mpg high in city driving.
______________________________ Reply Separator _________________________________
Subject: Re: Stock CIS, running out of gas at 2 bar?
Author: email@example.com at MAILHUB-SMTP
Date: 10/23/97 5:19 PM
> You wrote:
> >I don't know if the fuel distributor plunger
> continues to output more fuel all the way to the top of the
> plate travel or if it tops out earlier.
> I think from taking my fuel dist apart (maybe something good can come
> from destroying a fuel dist.) that once the plunger clears the top of
> internal slits that meter fuel to the injectors you would not deliver
> more fuel to the injectors with increased plunger travel given a steady
> state lambda circuit (I don't know how you could determine this point
> except by measuring plunger height). But you could deliver more fuel via
> the lambda circuit. If the ECU detected a lean condition I think it
> would try to correct it by changing the dwell on the lambda circuit
> unitil it was at a full rich condition (OXS F/V full open) in which case
> if the plunger was at full travel you would have max fuel delivery.
Not at WOT. The O2 sensor isn't used at WOT and a fixed table is
used for the frequency valve - 68% at high RPM. Current wisdom is
to set the duty cycle around 40% at idle, so this already gives
extra fuel at high boost and RPM... sounds like we need to do some
measurements of fuel delivered vs sensor plate position and frequency
valve duty cycle.