Tricking the ECU to Relearn AF map

[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.

[MGargano]

Originally Posted by hatchbackkid82

One of the reasons i got rid of mine. I couldn't get the CEL off. I did everyting possible, always got a CEL, i went 2 days at the most, before it came back on. I'll try this mod again in a few months, hopefully someone would have come up with somehthing else to get rid of the CEL, i did the chip swap and everthing. Nice mod, though just don't like driving around with that light on

It's really not even the CEL that bothers me. I have the Scangauge, so getting rid of the light is a breeze. It's the start-up and random oscillation that's killing me. And I'd hate to break open my brand-new TB to do the chip swap and still be stuck with the same problem.

[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

[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.

[kustom play]

i disconnected the battery today and followed the steps listed in the fist post

so far i have no CEL

so lets hope for the best!

i will post up my findings as i drive around this week

[Yoda]

please do you are my only hope lol

[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

[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.

[kustom play]

i did the chip swap already and the TB bypass so im hoping everything is solved

i'll have to wait and see

[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?

[kustom play]

CEL came on about 120 miles

ohh well, to me it seems to have more power with the CEL on then without it

no big deal, my next emission test is 2012, i'll put the stock one in the week i go get that done

[t0m4s]

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