Why does performance change after use?
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Member
Joined: Sep 2006
Posts: 75
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From: Florida
Why does performance change after use?
I have read posts about having a truck reflashed by the dealer and the truck running better for a period of time but then it would later decline in performance. Does the pcm go through some kind of learning curve where it self adjusts after a period of time or is this just due to the driver getting used to the improved performance and perceiving that it faded away?
If there is a learning curve for an engine, can I expect it to self adjust after I install TP Custom Tunes? In other words will it run a certain way immediately after I install the tunes and then adjust itself later??? Just curious and wanting to learn more!!!
If there is a learning curve for an engine, can I expect it to self adjust after I install TP Custom Tunes? In other words will it run a certain way immediately after I install the tunes and then adjust itself later??? Just curious and wanting to learn more!!!
Senior Member
Joined: Jul 2006
Posts: 6,282
Likes: 1
From: Farmington, MO
I can not give you a perfect answer here, but the truck "learns" how you drive, and the conditions like weather. When I change my tune to either tow/drag/street, it takes several miles before it shifts right, like when i first change the tune, and i do a wot run, it will shift at like 4k, which its set for around 5200.
Senior Member
Joined: May 2004
Posts: 5,409
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From: Sunny FL
Originally Posted by Superchips_Distributor
Adaptive strategy can reduce power with conservative driving, but not by a lot - so just drive the vehicle normally. This is why some guys, when they take their daily driver to the drag strip, will disconnect the battery for a few minutes to "clear" out the PCM & adaptive strategy adjustments, as they will sometimes pick up a couple of tenths of ET that way - but the same thing will happen just by making a few full-throttle runs. It comes back as quickly as it goes away, and we're only talking about a few percent power-wise, so it's not a big deal - nothing to worry about.
the "power is going to be there" no matter how you drive the vehicle, but it may be say, 97% instead of 100% if it's driven gently most of the time - that comes right back with a few full-throttle bursts over a couple of drive cycles, so it's really nothing to be concerned about.
Originally Posted by Superchips_Distributor
(Snip
When you reset and clear the computer you begin the adaptive strategy adjustments from scratch and it take about 350-500 miles to make the basic fuel curve adjustments and get the absolute best fuel mileage again.
When you reset and clear the computer you begin the adaptive strategy adjustments from scratch and it take about 350-500 miles to make the basic fuel curve adjustments and get the absolute best fuel mileage again.