Ya know, I haven't really monitored ALL of the sensors (mainly TPS and MAP)
for the Open Loop switch-over, but I can say that with all this "playing
around" with the MAP on my box, Open Loop is definitely determined in part
by the MAP sensor.
On the TPS question...hmmmm...on the older 5.0's, we used to "oblong" the
holes in the TPS sensor to be able to adjust it a few degrees. On the GM's,
you can get a better throttle response by altering the TPS signal as well
(basically advancing the voltage signal a few 1/10th's electronically).
I've got a few spare TPS sensors...lemme try something...heheheeh...now
where's that drill.
- Bernd
-----Original Message-----
From: owner-dakota-truck@BUFFNET.NET
Subject: Re: DML: Changing Injector Size (Bernd)
On that note (excessively rich conditions) - Recognizing the fact that at
WOT we transition
from a closed-loop fueling (and timing) strategy to an open-loop
strategy -and- the fact
that during open-loop the factory engineers provide a preset excessively
rich condition, has
anyone had success in approaching the "how do I make more power" question
from that
particular angle? My scantool tells me that my min TPS is around 12% and
max is around
72%. I wonder what defines WOT? Greater than 70% perhaps? That would be a
blanket
assumption and surely everyone's vehicle is not this way (12/72) - or is it?
I would think
the PCM could somehow interpret min and max and assign a percentile variable
to these
extremes - but - this has to occur before we even TOUCH the pedal which
doesn't compute for
me 8-). Any ideas here?
Shane
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:59:35 EDT