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I'm calling an end to the CTS-tricker test on the Focus.
Gains so far comparing 7 new data points to 8 previous data points.
Leg #1 +6.53% MPG
Leg #3 +9.85% MPG
Overall gain for all driving: +5.25%
Notes:
The CTS tricker has made a big improvement in idle speed and idle fuel usage while coasting and while stopped, when activated 10 to 15 seconds after a cold start and left activated throughout my commute route.
In the time period up to 1.5 minutes immediately after activation I have noticed a few slight lean stumbles when beginning an acceleration.
This is due to the reduced fuel delivery via the main fueling table, reduced AE, reduced spark advance, and mainly due to the fact that the spark plugs and combustion chambers have not warmed to an acceptable point (evaporation of liquid fuel problem). After the 1.5 minute mark and a very short acceleration, the plugs are warm enough to experience no noticeable misfires/stumbles. The slight stumbles noticed were well within what I considered acceptable and if not for Scangauge2 feedback data, would serve as verification that the CTS-tricker was activated and functioning as intended by changing the engine tune parameters and reducing fuel consumption.
I know from previous experience that in colder weather the setting on the CTS-tricker must be increased more gradually up to about the 2 minute mark.
That is, instead of going from actual 75*F cold-start almost immediately (10 to 15 seconds delay) up to 225*F on the CTS-tricker as I have been doing for these tests, a cold start at 30*F may require you to first go to a setting of 80*F -to- 100*F to avoid an unacceptable number of lean misfires, and then on up to 200*F+ around the 2.0 minute mark - or so depending on each individual vehicle and situation. Having the potentiometer for adjustment allows several adjustments at a gradual rate if you desire or need. With the use of a block heater and/or warm-air-intake, the rate can be increased.
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