Computer reset after TRD exhaust/air filter install - Page 4

waynesel · 12-04-2007, 12:10 PM

For what it's worth I was told by a mechanic friend of mine who did work on my Supra that you need to disconnect the battery over night. Worth a try I guess it certainly won't hurt. BTW how would you know if it did get reset?

***Dragon*** · 12-04-2007, 12:17 PM

I just had mine reset yesterday. The chief mechanic at Toyota said that it will relearn in time on it's own, just not as fast as it would if you have the learned values reset (relearn ECM). After it is reset, they recommend that you drive around a while, varying speeds as you go, so it will start to relearn your gearing. That is why I believe this to be important especially when larger tires are put on.

Your performance and gas mileage are going to be better if you start from a clean slate in the computer memory.

***Dragon*** · 12-04-2007, 12:19 PM

Quote:

waynesel previously said:

For what it's worth I was told by a mechanic friend of mine who did work on my Supra that you need to disconnect the battery over night. Worth a try I guess it certainly won't hurt. BTW how would you know if it did get reset?

See below

Quote:

ForDRTnST previously said:

The Only Way to reset the learned values, is to take it to the dealer and have them connect the Vetronix hand held tester and reset memory. unpluging the battery does not erase or RESET the vehicle's mapping, like in the OLD days! The new CAN- system ECUs learn...and can be adjusted.

waynesel · 12-04-2007, 09:37 PM

The battery that saves the memory for the ECU goes dead in 5 hrs. BTW how would you know if it were reset anyway without hooking up to a tester?

nylon · 12-30-2007, 02:40 PM

Quote:

Dragon previously said:

I just had mine reset yesterday. The chief mechanic at Toyota said that it will relearn in time on it's own, just not as fast as it would if you have the learned values reset (relearn ECM). After it is reset, they recommend that you drive around a while, varying speeds as you go, so it will start to relearn your gearing. That is why I believe this to be important especially when larger tires are put on.

Your performance and gas mileage are going to be better if you start from a clean slate in the computer memory.

Dear Dragon...Happy Holiday
I have two question i hope you might have answers for.. I’m thinking of installing the TRD Supercharge but i have heard that it will over heat the engine? Is that true? Second, after installing the TRD Supercharge, does the ECU needs to be reset/remaped by the dealer or it will learn its self.

Thx for your help

Racer001 · 12-30-2007, 07:00 PM

the supercharger should not overheat anything. The computer will more than likely be reprogrammed by toyota.

nylon · 12-30-2007, 10:23 PM

Quote:

Racer001 previously said:

the supercharger should not overheat anything. The computer will more than likely be reprogrammed by toyota.

Thx Racer

Nevada_FJ · 01-06-2008, 10:52 PM

Quote:

ForDRTnST previously said:

Oopps! I almost forgot! Do Not over-OIL your air filter as this will release some of the oil and contaminate the MAF meter (hotwire). some dust may bypass the filter and stick to the hot wire, eventually will set a lean code PO171, system lean and make you FJ run like cr_p! Easy to Fix! LOOK at the MAF hotwires, if it is dirty,clean with contact cleaner and let air dry!

I missed this post somehow? What is the filter behind the filter? How does oil get to the MAF sensor with this in place? How do I find the MAF "hotwire" I think that dust has made it past my second filter. I think that I need to clean this out. Thanks for any an all help.

Quote:

Dragon previously said:

I just had mine reset yesterday. The chief mechanic at Toyota said that it will relearn in time on it's own, just not as fast as it would if you have the learned values reset (relearn ECM). After it is reset, they recommend that you drive around a while, varying speeds as you go, so it will start to relearn your gearing. That is why I believe this to be important especially when larger tires are put on.

Your performance and gas mileage are going to be better if you start from a clean slate in the computer memory.

What did the dealer charge for this? Mine sucks and I am sure that they are going to ask me what this is when I as for it? I had to explain what A-Trac was to there master tech yes A-Trac he said they have many systems on there cars and he can not know them all.

Thanks you all for any help.

***Dragon*** · 01-07-2008, 05:54 AM

Quote:

Nevada_FJ previously said:

What did the dealer charge for this? Mine sucks and I am sure that they are going to ask me what this is when I as for it? I had to explain what A-Trac was to there master tech yes A-Trac he said they have many systems on there cars and he can not know them all.

Thanks you all for any help.

1/2 hour labor cost for two minutes of work. $49 here.

69cobrajet · 02-10-2008, 12:59 PM

I would think that the computer would not need resetting after these minor mods.There is no difference in my milage or any other thing since my mods.A waste of time and money (imo).Now with the addition of a supercharger that is another story.The A\F ratio would be all out of wack without some kind of recalibration.