True or False
Thread Starter
Racer
Joined: Feb 2008
Posts: 269
Likes: 0
From: Victoria British Columbia
True or False
I'm just trying to understand a couple concepts... lemme know if I'm on the right track.
When I do a PCM read with Tunercat, on a stock 94, the values I'm looking at are all the factory set default values for the PCM to use?
When I do a datalog with datamaster, the LTerm counts are what the PCM has learned, beyond the stock PCM settings, from the knock, O2, temp, etc sensors and therefor has adjusted the average fuel curve based on how I drive, grade of fuel, atmospheric pressure etc..?
STerm counts are immediate actions to fuel curve from sensor feedback?
Datamaster O2 mv's directly affect sterm counts?
It's ok for Sterm counts to bounce back and forth between lean and rich by how many values?
What is the fuel trim cell?
Why are a many knock counts ok before the PCM desides to retard timing?
Thanks Eric
When I do a PCM read with Tunercat, on a stock 94, the values I'm looking at are all the factory set default values for the PCM to use?
When I do a datalog with datamaster, the LTerm counts are what the PCM has learned, beyond the stock PCM settings, from the knock, O2, temp, etc sensors and therefor has adjusted the average fuel curve based on how I drive, grade of fuel, atmospheric pressure etc..?
STerm counts are immediate actions to fuel curve from sensor feedback?
Datamaster O2 mv's directly affect sterm counts?
It's ok for Sterm counts to bounce back and forth between lean and rich by how many values?
What is the fuel trim cell?
Why are a many knock counts ok before the PCM desides to retard timing?
Thanks Eric
Pro
Joined: Oct 2004
Posts: 504
Likes: 82
From: Melbourne Victoria
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Do a google search on LT1 PCM tuning, and also just PCM (or ECM) tuning. There are several good web pages out there that describe how it all works.
Table values, yes.
Values in calculators, no. (Like the speedometer calculator.) Those will show the tunercat defaults.
Values in calculators, no. (Like the speedometer calculator.) Those will show the tunercat defaults.
