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I have a 2007 acura tl base 91k miles and I can tell you it's pretty slow but after I disconnect the negative terminal on the battery for 5-10 mins, it performs very well and feels like I gained a 100hp. After 10-15 minutes I can punch the throttle and it won't even break traction with VSA off. My old 04 accord 4cyl accelerates faster than my TL. I cleaned the intake manifold, egr and throttle body. I also replaced spark plugs with NGK, I did the App sensor replacement and I replaced purge solenoid . I hate mechanics but I feel like even they won't figure it out. I also have no CEL light on.
Modern car ECU's learn habits.
when you disconnect battery for a few mins, the ECU forgets or resets your driving habits
Has anyone found any information how quickly(time/mileage) the ECU learns your driving habits? and is it a continuous adaptation of your driving habit or a one-time deal recording that sets your personal standard until you reset it again?
Has anyone found any information how quickly(time/mileage) the ECU learns your driving habits? and is it a continuous adaptation of your driving habit or a one-time deal recording that sets your personal standard until you reset it again?
Not sure how quickly it learns but I think its a continuous adaptation to your driving.
My 99 does the same exact thing, i normally reset the computer once about every month and a half, and i instantly notice how much quick and firmer the shifts are, it feels like im driving a different car, once i reset it, i used to try to drive fast just to get the computer to adjust to spirited driving. But it never works and after about a day give or take, it goes back to driving the same way👎👎. Maybe a pcm tune can solve this while adding some power. I know our cars are different, im just stating my experience.
My 99 does the same exact thing, i normally reset the computer once about every month and a half, and i instantly notice how much quick and firmer the shifts are, it feels like im driving a different car, once i reset it, i used to try to drive fast just to get the computer to adjust to spirited driving. But it never works and after about a day give or take, it goes back to driving the same way👎👎. Maybe a pcm tune can solve this while adding some power. I know our cars are different, im just stating my experience.
I think my car is messed up. I'm scared to try to beat traffic when getting on the road because there no throttle response. it takes time especially when the weather is like 75 degrees or more. I'm really starting to think honda is different from acura. I know they're the same car but honda don't do stuff like that. No matter how bad the car is. I always make sure my car runs good and I have No CEL light.
I shaved a full second off my 1/4 time by resetting the ecu in the staging lanes. By the time I picked up my slip it had reverted back to my old driving habits though..
I think my car is messed up. I'm scared to try to beat traffic when getting on the road because there no throttle response. it takes time especially when the weather is like 75 degrees or more. I'm really starting to think honda is different from acura. I know they're the same car but honda don't do stuff like that. No matter how bad the car is. I always make sure my car runs good and I have No CEL light.
what you're speaking of maybe considered heat soak.
heat is bad. sometimes, the car will get heat soaked and not perform as well.
it's especially noticeable in the summer months.
also, you do know that we make peak power at 6k RPM right?
when you're trying to merge, if you merge at lets say 3k RPM...you're only pushing like 100something torque.
you need to rev the ever living hell out of the car to make power!!!
Maybe Get a BlueDriver or other OBD-II module and monitor engine conditions immediately after resetting the ECU and compare them to the data when the car starts feeling slower. You may be able to narrow it down to engine temp differences or something else that could be causing the power loss. Just a thought...
I feel like my car goes much faster after i do a car wash... for real...
On a serious note, all of these are true and are felt thanks to our friend Placebo.
Only way to find out for fact is to do what SoSaysI said. That's what he said and so do I say. Now it has been said!
it's not engine temps. Though that does cause the car to feel sluggish. What OP is talking about is just the ECU learning his driving habits. The car relaxes if the driver is putting around. Helps with fuel economy, etc.
The question is: how long does it take for the ECU to learn habits and how often are they recalculated?
With his car being a 5AT, I'm not surprised the ECU starts to relax... I don't know many auto drivers that are always mashing the throttle and stuff. It's much more common with a manual transmission.
I store my car for the winter, meaning the battery gets pulled. The car learns my driving habits during the first month of spring/summer. During the summer the car tends to hang in the higher rpms of second and 3rd gear because I drive it with the sport shift and tend to keep it in those "fun gears" so when I'm driving in non sport mode the car still tends to hang in those gears for me. Now when I pull battery and take the car out for this first few drives, it does not feel as peppy as its trying to re learn my sweet spots. GRADE LOGIC
