Tricking the ECU to Relearn AF map

[MGargano]

Originally Posted by hatchbackkid82

Wait so with the Scangauge hooked up to the car, your telling me the CEL never comes on or it comes on you just turn it off. Have you tried adjusting the idle? It's really simple to open up, nothin in there for you to really damage

No, the CEL still comes on. I just use the Scangauge to turn it off right away. I haven't tried adjusting the idle yet. I'm not worried about damaging the stock TB, I'm just wary of opening it since it's almost brand new with less than 2,000 miles on it. If I open it up to do the chip swap, I want to know it's going to fix the problem.

[tk-421]

Originally Posted by MGargano

No, the CEL still comes on. I just use the Scangauge to turn it off right away. I haven't tried adjusting the idle yet. I'm not worried about damaging the stock TB, I'm just wary of opening it since it's almost brand new with less than 2,000 miles on it. If I open it up to do the chip swap, I want to know it's going to fix the problem.

You won't damage the TB if you open it, since all you're really doing is drilling off some rivets. You can always get it sealed back up to OEM specs using a rivet gun (I used screws myself). I think you should give it a shot if you can and see if that solves the problem. Won't take more than 10 mins to do the swap.

Then again, you may want to adjust the idle screw first, which is even easier to do.

[MGargano]

Originally Posted by tk-421

You won't damage the TB if you open it, since all you're really doing is drilling off some rivets. You can always get it sealed back up to OEM specs using a rivet gun (I used screws myself). I think you should give it a shot if you can and see if that solves the problem. Won't take more than 10 mins to do the swap.

Then again, you may want to adjust the idle screw first, which is even easier to do.

I guess I'll give the chip swap a try if the problems come back. I reconnected the battery and got no CEL or oscillation on start up this morning so I'll give it a few days *fingers crossed*

[MGargano]

Originally Posted by tk-421

It's weird how some ppl still gets CELs even after doing the chip swap. I still haven't had a CEL, and I've been driving it pretty hard.

I think it has something to do with the serial numbers located in the bottom of each TB, but I can't tell for sure.

No CEL but do you get the oscillation?

[tk-421]

Originally Posted by MGargano

No CEL but do you get the oscillation?

I get minimal oscillation (~300 RPM at the most) while running warm. Not too concerned about it myself. Pretty much the same as stock.

[Yoda]

please do you are my only hope lol

[MGargano]

Originally Posted by kustom play

well looks like good news

so i disconnected the battery for about 3 hours

came back and hooked it up started it up, it oscillated a bit then came down to normal

so i waited about 5 mins after that, then reved it up for about 3 more mins

after a while of reving the car started oscillating again so i stopped and let it settle

then i reved it back up for another 2 more mins and then went for a drive

i drove about 110 miles today with no CEL or no problems

looks like im in the clear

i hope it fixes the problem

I wish you all the luck in world and I hope this solves your problems. For me, after 3 days, the oscillation keeps getting worse and I've gotten several CELs. The chip swap is next on my to-do list.

[MGargano]

Originally Posted by Yaris T-Sport.

hehe, should have done the chip swap in the first place, I'm now running with the 2.4 L Tc TB ( a little more bigger than the 1zz TB, yet a little more power ) with the 1nz chip for over a month with trouble free runs, no cel, no oscillation what so ever.

Do you still get the high cold idle with the tC throttle body?

[MGargano]

Is this the tC TB you have? The 2AZ?

http://cgi.ebay.com/ebaymotors/04-05...Q5fAccessories

[Yoda]

Originally Posted by Yaris T-Sport.

yes, which is normal due to the bigger TB opening, about 2.5k, then it sattles right away to 700s



Yes, and I swapped the chips.

Was that all nothing esle special done? I might just jump on this if no cel. Did everything work fine when you first put it on and what year exactly did you get?

[t0m4s]

did everybody trim the OEM TB gasket to allow more air flow as t-sport did?

[tk-421]

Originally Posted by t0m4s

did everybody trim the OEM TB gasket to allow more air flow as t-sport did?

I did. That gasket is a joke. I find it hard to believe that it does anything at all.

[xbalance]

how to have more air to flow in to a N/A engine?
last time i drove a lancer the swap is easy as the TB is run by a cable but the new Yaris TB is drive by wire, understand to do a swap for TB is not that easy any more...

Is there any TB is direct swap in for Yaris engine?
Do we need to mod the TB plug to fit in the new TB?

Will the ECU have any issue to the new TB?

[AlexNet0]

Originally Posted by xbalance

how to have more air to flow in to a N/A engine?
last time i drove a lancer the swap is easy as the TB is run by a cable but the new Yaris TB is drive by wire, understand to do a swap for TB is not that easy any more...

Is there any TB is direct swap in for Yaris engine?
Do we need to mod the TB plug to fit in the new TB?

Will the ECU have any issue to the new TB?

there are three threads dedicated to this subject. in this subforum.

[gwasabi]

That's because you have air in your radiator hose. What I suggest is take the radiator cap off and run the car in idle until the bubbles don't come up. the fluid should overflow a little and then when it's settled just pop the cap back on.

[gwasabi]

Also the Random Oscillation is due to the ECU trying to learn what to do with new TB. Did I mention that this method only works for manual cars? anyway, IF you drive around and get random oscillation just start driving a little harder for a while the opscillation should go away. If it doesn't turn the car off then on right away and it should go away. It happened to me for the first few days but after that it was gone. I have the TB on my car right now and I have NO PROBLEM what so ever with the new TB. No cel, No Oscillation. been like that for almost 5 months now

[gwasabi]

That ar in the radiator hose part is VERY VERY IMPORTANT! I think i should edit the first post lol

[Yoda]

i hope so too i am still waiting....