How long does it take for the cumputer to learn?

[Foxed]

A friend of mine told me it takes four miles for our cumputers to adjust to whatever it is you add to the motor(maf, Tb, intake ect...). I was just wondering if this is true. It seems like to me it takes a little while longer than that.

 

[custom89stang]

in terms of exhaust i have heard anywhere from 100 to 1000 miles

 

[Superhereaux]

i think it's 3 drive cycles, at least that's what i've heard


start the car and drive it till it warms up, turn off and let the engine get cold, repeat

try to vary engine speed (including wot) during the drive cycles

 

[HISSIN50]

It completely depends upon what was done and how long and the type of driving. The learning curve is different for different components.

Good luck.

 

[vikingpower]

Dont forget to disconnect the battery for a few minutes to wipe out the computers memory when you put new parts on.

 

[N8Miller]

10-20 minutes of running time from what i have been told.

 

[BaXTeR3221]

Disconnecting the battery and depressing the brake pedal clears the computer of all its karmf data. I would imagion it prolly takes around 4-5 cycles to re-establish this data and only under varied driving conditions.

 

[_jb_]

I thought about two weeks....

 

[jrichker]

10-20 minutes of running time from what i have been told.

I second that.

 

[giddyup306]

It could take 500 miles or more. A good example (not Fox specific) is if you have a very minor vacuum leak. It may not throw a converter inefficency DTC or peg out the fuel trim and throw a DTC for several hundred miles! Although these are just 2 specific examples, you can apply it to about any perameter.

Mike

 

[txstang84]

don't forget if your driving habit's change, and as your sensors "deteriorate". over time all sensors lose their sensitivity and the computer has to compensate for those changes whether it's a O2, ECT, or an ACT sensor (ones that get covered in garbage)

in those respects, the computer constantly "learns" and has to adapt it's fuel and spark strategies based on driver input and sensor input.

 

[giddyup306]

don't forget if your driving habit's change

Good point. I remember a specific example where I guy brought his car into the shop. Said it ran like crap untill about half way to the shop. Then by the time he got there it ran fine. Turns out his 16 year old son drove it the night before and rodded the **** outta it. It took 10 maybe 20 miles to clear up and get out of the "performance" (or whatever you want to call it) mode.