Ecu Re-learn?

BlexusGS · October 21, 2006

Hello,

As many of you might know from my previous posts I own a GS400. Why is it everytime I clean and re-oil my K & N intake filter the car runs AMAZING; great low-end power with almost a boost-like thrust for only about 1 hour??? After that it literally feels exactly how it did before? I don't understand, is the ECU re-learning back to stock. I have done the ECU resetting before but it just seems like it is only a matter of a short while until the ECU kicks back to stock readings again. Anyway around this madness??? Maybe a chip (if someone even makes a chip). What about JET performance (send-in type ECU reprogram service). Your input will be greatly appreciated! :pirate:

Nick

SKperformance · October 21, 2006

The hardest part of tuning any Toyota is that what makes them so reliable is what also makes them hard to tune.

Toyota Ecu's are variable meaning they will take almost any reading from a sensor and make it true. So if it thinks it is getting dirty it will adjust the readings accordingly.

So when you get a clean filter it gets more air and slowly changes readings until they are par again. Disconnecting the battery only removes it changes made and makes it hunt for new baseline readings.

Similar to those resistor chips that are for sale all over eBay . They work on some cars because it makes the ecu run rich by adjusting the air fuel mixture. On a Toyota it will revert back to normal after a few minutes of adjusting rendering it useless.

I am going to move this to the general maintenance section as it is not a car specific question as such and others may learn something beside GS owners.