mpesik

Hi there. I bought a new battery for the car. Installed it and just went off on my own way. What I've noticed is less ooomff especially at low RPM's. I did not let the car idle for 10 minutes or so prior to taking off. I've read that the computer requires a few minutes to get to know itself again . Is this the problem! Or what I've heard about reboot time is Malarcky? Hoping that this is a simple issue. Mike Thank-you for any info.

John Speake

Mike,
It will take several minutes of running under a variety of conditions for the LH ECU to re-adapt to your car. This is mainly is compensating for MAF ageing. The worse the ageing, the longer it takes.

Randy V

Try fixing that wing nut.

dr bob

Pretty sure his doesn't have one of those, at least from the factory.


Mike--

Mine seems to learn "differently" depending on how I happen to drive it following reset. I unhook the ground strap whenever I'm away from the car for more than a week, and this year it's been a fairly regular exercise.

Learning: I suspect that the first minute or so is wasted since the oxy sensor needs to heat up. After that, if I immediately drive it briskly for a while, the later response seems to be better than if I am ultra-conservative during that initial drive.

John--

For how long does the controller learn or adapt after a power-off reset?

EspritS4s

I don't think Mike is around these days unless he is lurking. Randy was having some fun last night resurrecting a bunch of his old threads.

the flyin' scotsman

wow this is an old thread........Mike a banned status?

John Speake

The S4 and later cat equipped cars have two forms of adaptation -
idle adaptation (which is quite quick, about 5-10seconds) and O2 adaptation which takes several miles of driving under varying loads and rpms to fully adapt the LH ECU.