Yes the ACT sensor is the last chance for the EEC to
make air/fuel mixture
adjustments as the aircharge temperature changes. I
still don't buy the idea
that it pulls timing retard but what the heck it
works for me.
I would think that the VAT takes care of any inputs
that would affect
adjustment from idle to WOT as long as the ACT
sensor does not turn in a
different reading from the VAT.
Like Randy said ECT,VAT, ACT inputs are used by the
EEC to do changes, yet
the ECT input is the main timing modifier from my
point of view.
Jaime
77 Pinto SW Cruiser DPDIS, EFI turbo, ABS.
88 T-Bird TC DPDIS.
I think everyone is missing the point here. If the
ACT pulls timing at
high
charge temps, that is to prevent detonation, at
the time when it most
likely
to happen. This undoubtedly allows more timing
everywhere else, only
dialing
in a minimal retard when most needed. This leaves
more lead during light
throttle cruise, cool ambient air conditions, or
when the motor is cold,
to
name a few.
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