Tricking the ECU to Relearn AF map

[gwasabi]

I've been reading a bunch of people who installed the throttle body and are having CEL coming on. I used to drive a G35 and a Celica and having done intake mods to it and having CEL come on, I asked one of my modder friends to help me get rid of this. This trick worked on both my celica and G35. This should get rid of the Oscillation and CEL light after installing the 1zz TB.

NOTE: THIS ONLY WORKS FOR MANUAL TRANS! AUTO TRANS HAS A SET TB OPENING POINT SO THIS METHOD WON'T WORK!

Step 1: Install TB....I don't have a DIY for this, just find someone else's and do so.

Step 2: Get all the air out of the Radiator hose. This is done by popping off the radiator cover and running the engine until the radiator doesn't bubble anymore. It should overflow a bit. Just cap it once it does.

NOTE: STEP 2 IS VERY VERY VERY IMPORTANT!!!! THIS IS THE REASON WHY WOU WILL GET RANDOM OSCILLATION AND CEL DURING DRIVING!!!!

Step 3: Disconnect battery over night (I disconnected for about 2 hours). This is to make sure the ECU resets itself. Then reconnect the battery.

Step 4: Turn car on and you will notice it oscillate for a while. Usually for about 2 min or so. let it settle.

Step 5: IN NEUTRAL, Rev the car up to about 4-5k RPM for about 5 min. Then let the car idle for about 2 min. Then Rev the car up to about 4-5k RPM for another 5 min. The ECU learns how you drive and tries to adjust the AF ratio according to your driving performance. Doing this step tricks the ECU into thinking that you are driving "super crazy racer maniac style".....honestly its just saying you drive with a heavy foot so it puts more fuel at a faster rate to compensate for the amount of air coming in.

NOTE: IN STEP 5 I ONLY PUT THAT YOU DO THIS CYCLE TWICE. I ACTUALLY DID IT ABOUT 3 -5 TIMES. THIS IS TO PUT THE ECU INTO THINKING YOU DRIVE HARDER TO COMPENSATE FOR THE EXTRA AIR BEING LET IN. IF YOUR WORRIED ABOUT THE ENGINE THEN USE A CYCLE OF 3-1-3-1-3-1 (ex. 3 min rev at 4k, then 1 min of idle). ALSO NOTE YOU HAVE TO HAVE IT AT 75% OPEN THROTTLE which will bring the car up to about 4-5K in RPM.

Step 6: Turn car off for about 5 min. Start it up. And Test drive. If you still get the CEL an oscillation, park, then do Step 5 again.'

NOTE: TURNING THE CAR OFF HELPS THE ECU TO STORE YOUR DRIVING STYLE AND LET IT SETTLE DOWN. YOU DON'T NORMALLY HAVE TO DO THIS STEP BUT I SUGGEST YOU DO AS A PRECAUTION!

DRIVE IT AROUND FOR A WEEK. During this week you will get some CEL and oscillation but it should go away soon. if it continues after a week try Step 5 again.

I did this trick on my celica, g35, and Yaris and seem to have worked all three times. My yaris is running off the 1zz throttle body without the chip mod and I haven't had oscillation or CEL thrown for over 3 months. when I did this trick, the CEL and oscillation went away immediately.

I'm not garanteeing this as a surefire way to get rid of it but it seems to work on most cars. Try it out if you have the time and let me know!

Hope it works for you guys too!

BTW I drive a 07 Yaris HB MANUAL!

[yarstar]

Thanks for posting this fix.

Does this also fix the high rpm cold idle?

[AlexNet0]

I do not believe you can fix the high COLD idle, as the butterfly valve opening is around 30% larger, therefore it opens the throttle 30% more without realizing it.

[DogTony]

What I did with mine was to disconnect the battery for 10-15 mins and reconnect.

If you successfully reset the ECU, once you start the engine, you will feel (or if you are standing in front of the bonnet, you will see it is shaking back-forth) actually the engine kinda shake a bit for 4-5 seconds.

Then start to drive like you stole it for a while (1-2 tanks). Then the process is completed.

[eTiMaGo]

Yeah gwasabi's procedure should help, the ECU does have a learning feature for the throttle controller, letting it idle for a while *after* using the engine (driving, or revving in place like this) should kick this in.

[BLAZINBLUEVITZ]

2 things come to mind. i have no tach so how do i know rpms and isn't 5k a bit high to be reving for 5 minutes straight......

[CASTREX]

I wonder if we could trick the ecu into think the Yaris is a F1 car instead of an Econobox....:rolleyes:


J/K


You got me lost with something... what does the radiator has tod do with the hole ECU re learning process?


But yeah... the ECU learns the way you drive. I found that a long time ago when I was doing an audio installation to the car and the battery was unpplugged for over 24hrs.


When I drove the car after that it was really slow... laggy response... but after 30 min of suffering my driving style it came back to normal....

I guess it helps to do this during night or with a fresh climate instead of doing it on a hot day.

[talnlnky]

I wonder if we could trick the ecu into think the Yaris is a F1 car instead of an Econobox....:rolleyes:


J/K


You got me lost with something... what does the radiator has tod do with the hole ECU re learning process?

I'll take a stab and guess that that's solely for cooling purposes. Any air in the radiator will reduce its cooling abilities, since you'll be revving at 5k fro 5 mins at a time, seems as though a little extra cooling might be a good idea.

[AlexNet0]

did anyone still have oscillation AFTER the 1zz to 1nz chip swap?

[gwasabi]

The radiator part (Part 2) is so after you install the 1zz you get all the air bubbles in the coolant hose out. If you have air in the coolant hose then you will get a CEL at wierd times. You'll be driving about 20 miles without it on then about 2 miles with it on then another 20 miles without it on. When the air goes through the coolant hose and goes through a certain part of the car, it will reduce your car's tourque dramatically. You can actually feel the loss of power. You'll be driving fine for a while then all of a sudden a dip in the powerband then it goes back up gradually. Also, your hose might explode(not really explode but the air causes a gap in the hose bung) and leak coolant all over your engine bay......it happened to me.

You can figure out roughly where your RPM limitor is at by reving as hard as u can and see where your rev bounces then from there make an educated guess :) I just reved mine up about 3/4 way

[yarstar]

did anyone still have oscillation AFTER the 1zz to 1nz chip swap?

Oscillation gone after chip swap with mine. Only problem is high cold idle. I can live with that for the increase in power this gives.

[PHXDEMON]

just to double check the throttle body off an 03/04 matrix/corolla is the one everyone is doing the swap with correct?

[AlexNet0]

just to double check the throttle body off an 03/04 matrix/corolla is the one everyone is doing the swap with correct?

'05 and up drive by wire Tb's from the matrix/corolla with the 1zz engine

[kustom play]

im going to swap it tomorrow

i'll give this a try and hope it works

[Yoda]

good luck m8 i wait for your results....

[Yoda]

so kustom did your car blow up lol or is it ok

[thebarber]

i did a similar procedure w/ my tb last year and never had problems. you've GOT TO disconnect the battery and when the new tb is installed, let the car idle for 10-15min before a test drive

alexnet0 is right, the high cold idle wont go away due to the 1zz tb being so much larger than th 1nz tb

i still have an extra 1zzfe tb for sale btw

[kustom play]

i didnt end up trying this out yet, i havent had the time to do it

im going to try to give it a shot in the next few days and i will post up my findings

[tk-421]

I don't like the cold idle at all. I keep feeling that I may be stressing the internals more than before...

[PHXDEMON]

How high is the cold idle? Like 3k RPM?

[Yoda]

i can take that tb off your hands rigth now barber it is the right one for the yaris? fits the 08 SD?

[gwasabi]

my cold idle is 2k

[tk-421]

My cold idle is almost exactly @ 2.5K

[at3GG]

couple of questions....where did you guys get these tb's? Junkyard ? how much did they cost you? Can you feel a noticeable power increase? Has your MPG suffered? And the last and most n00b question...how many do you need anyway?

[gwasabi]

In hawaii, You can get these at junkyard for Cheeeeeeeeep! 20 bucks for some high scaled junkyard, FREE.99 for some whatever kind junkyard as long as you get big pocket. I bought mine from barber though....you never know what happened to the TB in the junkyard might be all buss up.

BIG NOTICABLE POWER INCREASE! Midrange to Higher RPM. I used to have trouble getting to 60 in stock after TB it goes 90 easy. MPG goes down but not by much. I noticed around 3 or 4 mpg. and you only need one TB

Hit up barber I think he has a extra one

[MGargano]

Just installed my 1ZZ TB and got a CL instantly on first start-up to clear the bubbles from the radiator hose (Step 2). I have the car sitting now with the battery disconnected... will try steps 4-6 in a few hours. Hopefully this works since I more than a little nervous about trying the chip swap!

[at3GG]

how hard is this to swap?? anything required besides the TB itself?

[at3GG]

and barber how much for the TB you have?

[gwasabi]

No not hard at all just gasket i guess

[at3GG]

gasket? as in modifying the stock one or purchasing/ making a new one? Pretty n00b at this as you can see. Any one interested in doing a DYI lol

[gwasabi]

Gasket maker. That's what most people are using. I didn't use any gasket though.....mine didn't come with one stock so I figure just put em in hahaha

[at3GG]

haha nice...anyone got any pics of install or before/after etc?

[MGargano]

I just went out to perform steps 4-6. The engine oscillated for about two minutes and gave me the high cold idle, but the CL is gone without doing steps 4-6. I'm hoping the oscillation goes away and the CL stays off. I guess time will tell.

[gwasabi]

Oscillation should be gone too try doing the steps one more time usually it should only takes the ECU 15min to learn the drive style but it might be a little dumb so go try it one more time oscillation should go away

[MGargano]

I actually didn't do the steps since the CEL didn't come back on. I figured the oscillation would just go away on its own after driving the car normally for a while? Or should I do the steps anyway?

[gwasabi]

you should do the step or oscillation will come back until you do it because the ecu gets confused. if you dont do the last steps the oscillation will come back randomly while your driving.

[MGargano]

you should do the step or oscillation will come back until you do it because the ecu gets confused. if you dont do the last steps the oscillation will come back randomly while your driving.

Ok, will do the last steps today then. Thanks!

[Yoda]

so well how does it feel?

[at3GG]

im thinking i want this mod lol gotta save up some cash...

[MGargano]

so well how does it feel?

Feels great. Engine feels more 'alive'. Definitely more pep and power. I didn't get the oscillation at cold idle this morning, but it did throw a CEL after driving for a few minutes. Should I disconnect the battery for a while and then do the last few steps?

[at3GG]

i think theyre saying to just live with the CEL for maybe a day or two and just let the ECU adapt. I would give that a shot.

[MGargano]

I have the battery disconnected now... will run through the steps in a few hours...

[MGargano]

Did step five 2 1/2 times and the oscillation is gone. CEL hasn't come back either. Will check again tomorrow morning when cold starting. Revving up to 4,500 in neutral for 5 minutes was probably the hardest part... poor little car!

[at3GG]

heh poor neighbors

[MGargano]

heh poor neighbors

I actually did have someone peek his head out and give me a 'WTF' look

[at3GG]

hahaha nice get em a donut in the morning all will be forgiven!

[gwasabi]

lol I was revving mine at red line(6k) for 5 min twice hahahaha

[MGargano]

lol it'll all be worth it if this keeps the CEL and oscillation away

[tk-421]

lol I was revving mine at red line(6k) for 5 min twice hahahaha
Ouch... Sounds painful! :eek:

[MGargano]

Got some light oscillation a few times today, so I did step 5 again. Think I should just drive it hard for a few days?

[gwasabi]

When do you get the oscillations? while driving or while in idle?

[MGargano]

At start-up when it's cold it oscillates 4-5 times and then stays around 3k for about 30 seconds, then calms down to normal. I get oscillations sometimes when driving too.

[gwasabi]

hm....did u check for air in your radiator hose?

[MGargano]

hm....did u check for air in your radiator hose?

I did not. How should I do that?

[gwasabi]

Open the radiator cap and turn your car on and wait till all the bubble comes out. usually about 3-5 min.

[MGargano]

Ok... will try that now

[MGargano]

I got the oscillation at start-up and the fluid only bubbled for a second or two... then the coolant started rising and spilling out so I put the cap back on.

[gwasabi]

good good
now try the procedure

[MGargano]

Go straight to step 5? Or start by disconnecting the battery for a while and then do step 5?

[gwasabi]

Disconnect the battery first to reset the ECU

[MGargano]

Ok I'll disconnect the battery overnight and then start fresh tomorrow

[Yoda]

wait for the results buddy

[MGargano]

No oscillation at first start-up after reconnecting the battery, but I revved it heavy for a few minutes anyway. Still no CEL, but getting minor oscillation randomly when driving.

[Yoda]

:( sorry to hear that keep us mainly me posted lol

[MGargano]

Now I got CEL 3 times today as well as start-up and random oscillation :(

[Yoda]

:( o man keep hope alive

[MGargano]

... make that four times with the CEL, including heavy start-up oscillation. Also, when I press or release the gas pedal, the car jerks, like it's jumping. I'm quickly getting fed up with this TB. Ideas?

[gwasabi]

The jerking is normal. heavy DFTS.

That's wierd that method work for me with no oscillation problems....hmmmmm....Try driving couple more days and see if the ECU learns by itself

[Yoda]

yea mine jerks sometimes too. How long haveyou been driving on it? I forgot if you did the chip swap or not...

[MGargano]

yea mine jerks sometimes too. How long haveyou been driving on it? I forgot if you did the chip swap or not...

No, I didn't do the chip swap and I don't want to, if I can avoid it. I'd hate to crack open the original TB since it's got less than 2,000 miles on it. It's weird cuz the jerking just started out of nowhere, along with the CEL.

[MGargano]

The jerking is normal. heavy DFTS.

That's wierd that method work for me with no oscillation problems....hmmmmm....Try driving couple more days and see if the ECU learns by itself

What's 'heavy DFTS'? I disconnected the battery again overnight and will start over today. I'll try driving it for a few days if I get any of these problems again.

[hatchbackkid82]

One of the reasons i got rid of mine. I couldn't get the CEL off:thumbdown:. 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

... make that four times with the CEL, including heavy start-up oscillation. Also, when I press or release the gas pedal, the car jerks, like it's jumping. I'm quickly getting fed up with this TB. Ideas?

[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. :iono:

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]

One of the reasons i got rid of mine. I couldn't get the CEL off:thumbdown:. 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]

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]

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]

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]

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. :iono:

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]

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]

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]

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/04-05-06-Toyota-Camry-RAV4-Solara-2-4-Throttle-Body-2AZ_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116Q QhashZitem120381205686QQitemZ120381205686QQptZMoto rsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

[Yoda]

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?

[tk-421]

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]

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.

[kustom play]

so my CEL came off today as i was driving into work

it kicked back on after about 110 miles of driving, im about 280 now and it kicked back off

this never happened during the first install, so trying it the 2nd way seems to be producing some kind of different result

i'll keep an eye on it and report back any findings

[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.

[kustom play]

yea im going to give that a try next

thats the one thing i havent done yet

[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

[kustom play]

it kicked back on again

im going to do it in a little bit and see if it help it at all

[kustom play]

burped the coolant

CEL has went off and it has not come back on again

so i hope this solves it once and for all

[Yoda]

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

[kustom play]

my light went on again

so i give up trying to get it off, im just going to deal with it on

[gwasabi]

Just keep driving with the lights on eventually it'll go away

[kustom play]

just turned off again

so hopefully it stays off at this point

[PHXDEMON]

just turned off again

so hopefully it stays off at this point

You are just getting a CEL correct not a CEL + oscillation?

[kustom play]

just the CEL

the oscillation was only about 5 mins after i hooked the battery up and it learned the new air map. I havent had an issue with oscillation since just the CEL coming off and on

[gwasabi]

Thats probably due to the Coolant just drive around for a bit and let the coolant settle. It'll eventually just go away

[kustom play]

i burped the coolant, and it went off then came back on now went back off, hasnt come back on yet.

hoping it just stays off, if not then ohh well, i'll just deal

[Yoda]

I FORGOT AND AM TOO LAZY TO REREAD DID YOU DO THE CHIP SWAP AND WHICH TB WAS IT AGAIN AND YEAR...

[gwasabi]

No I didn't do the chip swap I don't think kustom play did either

[kustom play]

i did the chip swap and the coolant bypass as well

[Yoda]

i can not find it on ebay.....LAME

[PHXDEMON]

Dammit mine started oscillating again and hard :cry: No CEL just hard oscillation like 1-4k rpm while driving.

[Yoda]

wo wo wo wo thats not sexy

[kustom play]

CEL is back off again

i wish it would just make up its mind already

[AlexNet0]

Dammit mine started oscillating again and hard :cry: No CEL just hard oscillation like 1-4k rpm while driving.

That was my issue I just said fuck it and sold it.

[PHXDEMON]

That was my issue I just said fuck it and sold it.
Yeah I think I might do the same :frown: It sucks because on wednesday it ran flawlessly to work and back and then it just started happening again for no reason. I really want to figure this out and get it fixed though because there is definately a big power difference with it on. Did your oscillate randomly or is it like mine where sometimes you start it up and it runs fine but sometimes you start it up and it immediately starts oscillating?

[kustom play]

this is what you should do, seems to work for mine

unplug the battery for about 4 hours

chip swap the TB

do the coolant bypass

plug battery back on start car

wait about 5 mins to oscillation so settle down

step on the gas to make the car think your driving it, hold it at like 5K RPMS for about 5 mins (mine started to oscillate again, stopped let it settle and did it again for 2 more mins.

let car idle for 5 mins

shut car off, let it cool down for a few hours

open radiator cap

start car up wait for bubbles to come out and fluid to just about overflow then put the cap on, putting cap on should cause the coolant to come out at that point, wipe up spilled coolant.

drive around , my CEL went off then came back on the went back off but seems to be off now.

but i never had oscillating anymore using this system

[PHXDEMON]

this is what you should do, seems to work for mine

unplug the battery for about 4 hours

chip swap the TB

do the coolant bypass

plug battery back on start car

wait about 5 mins to oscillation so settle down

step on the gas to make the car think your driving it, hold it at like 5K RPMS for about 5 mins (mine started to oscillate again, stopped let it settle and did it again for 2 more mins.

let car idle for 5 mins

shut car off, let it cool down for a few hours

open radiator cap

start car up wait for bubbles to come out and fluid to just about overflow then put the cap on, putting cap on should cause the coolant to come out at that point, wipe up spilled coolant.

drive around , my CEL went off then came back on the went back off but seems to be off now.

but i never had oscillating anymore using this system


I did the coolant thing but didn't let it overflow I'll try that. so 5k rpm for 5 minutes. Poor little car :wub: Oh well that bitch deserves it for doing me wrong by oscillating :evil: We need to arrange a Yaris meet so I can see your pink wheels :laugh:

[PHXDEMON]

Also I don't see how the coolant thing could cause oscillation with the TB coolant bypass done. Anyone care to elaborate?

[gwasabi]

With a bypass it shouldn't oscillate if it is its just the Throttle being wierd

[kustom play]

yea the burping the coolant helped to get my CEL off

yea we'll have to get a meet going soon

i think there are not to many of us here in phoenix

[jmew0ng]

wait till I install my TB till you guys get a meet lol... (i'm just going to install after finals are over).
it seems like there's just 3 of us from phoenix on here
For the chip swap did you just use a new set of nuts and bolts?
and what did you guys do to get the rivets out?

[kustom play]

i just drilled them out

i just snapped the chip back in, i didnt bolt it and its holding fine

[kustom play]

well seems like my CEL is off now yayz!

took a while to get it off for good

[tk-421]

That's awesome... On to the next CEL-inducing mod! :laugh:

[kustom play]

swearing at it didnt seem to work, then i threatened to trade the car in and it went off

it knows i mean business...