DIY - 1.8L 1ZZ-FE TB Connector Chip Swap - Page 14 - Toyota Yaris Forums

MGargano · 05-21-2009, 12:53 AM

The chip swap was working fine for me... no CEL or oscillation... until I had to disconnect the battery to swap the steering wheel. Once I reconnected, oscillation & CELs galore.

jkuchta · 05-21-2009, 03:10 AM

What codes are showing up?

Just saying you have a CEL is kind of worthless unless we know what the code is. It could be just a case of needing to adjust the idle set screw, or a number of other things.

MGargano · 05-21-2009, 03:13 AM

Quote:

Originally Posted by jkuchta

What codes are showing up?

Just saying you have a CEL is kind of worthless unless we know what the code is. It could be just a case of needing to adjust the idle set screw, or a number of other things.

P0505- Idle Malfunction

jkuchta · 05-21-2009, 03:46 AM

Have you adjusted the idle screw? If you've turned the screw out too far you could get this code...try turning the screw in one or two turns (with the car off). This should fix the problem.

If you haven't adjusted the idle set screw, turn it counter-clockwise 1.5 turns (with the engine off), and see what happens.

MGargano · 05-21-2009, 09:39 AM

Quote:

Originally Posted by jkuchta

Have you adjusted the idle screw? If you've turned the screw out too far you could get this code...try turning the screw in one or two turns (with the car off). This should fix the problem.

If you haven't adjusted the idle set screw, turn it counter-clockwise 1.5 turns (with the engine off), and see what happens.

I haven't touched the idle screw at all. The thing was working perfectly for over a month, right up until I disconnected the battery. I'm not going through this every time I disconnect the battery... plus, even when it's working perfectly, the high idle is now quite loud with the exhaust I have. I'm 99% I'm switching back to the stocker today.

Yoda · 05-21-2009, 09:41 AM

any one has a DYI on how to install the TB? I am looking through tha manuall and drawing a blank. Do i need anything special?

jkuchta · 05-21-2009, 01:26 PM

Quote:

Originally Posted by MGargano

I haven't touched the idle screw at all. The thing was working perfectly for over a month, right up until I disconnected the battery. I'm not going through this every time I disconnect the battery... plus, even when it's working perfectly, the high idle is now quite loud with the exhaust I have. I'm 99% I'm switching back to the stocker today.

If you turn the idle set screw out about a turn and a half, all of your problems will go away.

When you leave the screw is the "corolla" position, the yaris ECU adjusts the idle fuel to get a stable idle. This takes time, as the ECU needs to make some pretty big changes. When you adjust the idle set screw to the correct position, the ECU doesn't have to work nearly as hard to get a normal idle, so the ECU doesn't freak out.

The idle rpm fluctuations are a result of the ECU hunting for the right fueling to maintain a steady 600-700 rpm idle in the face of way too much air going through an unadjusted corolla TB.

The P0505 code is the ECU saying..."WTF!!...Why can't I idle at the fuel trims I'm programmed with...something must be wrong!!"

kustom play · 05-21-2009, 02:01 PM

Quote:

Originally Posted by PHXDEMON

CEL was gone. Car completely died and wouldn't even idle. Start it up and it woul ddie instantly. I used the original gasket plus gasket maker, I did the coolant bypass, I did the chip swap. I did everything it just didn't work out for me

i would say come over and we can try it again and i can follow you and swap it back if it f's up again

thats if you still have it

AlexNet0 · 05-21-2009, 02:02 PM

Quote:

Originally Posted by Yoda

any one has a DYI on how to install the TB? I am looking through tha manuall and drawing a blank. Do i need anything special?

If you search, you will find it. there have been like 3

Yoda · 05-21-2009, 02:24 PM

Quote:

Originally Posted by AlexNet0

If you search, you will find it. there have been like 3

thx it wasnt too hard so i didnt need the diy. Didnt do the chip swap gonna see what other means there are to eliminate the cel if i get any.

jkuchta · 05-21-2009, 03:20 PM

Quote:

Originally Posted by Yoda

thx it wasnt too hard so i didnt need the diy. Didnt do the chip swap gonna see what other means there are to eliminate the cel if i get any.

If you adjust the idle set screw you might be ok.

AlexNet0 · 05-21-2009, 03:32 PM

Quote:

Originally Posted by Yoda

thx it wasnt too hard so i didnt need the diy. Didnt do the chip swap gonna see what other means there are to eliminate the cel if i get any.

Did you get the oscillation? thats what the chip swap was originally indended to fix

Yoda · 05-21-2009, 03:35 PM

Quote:

Originally Posted by jkuchta

If you adjust the idle set screw you might be ok.

adjust it to were? sry total noob at this. dont even kno where the darn thing is

marcus · 05-21-2009, 03:52 PM

Quote:

Originally Posted by Yoda

adjust it to were? sry total noob at this. dont even kno where the darn thing is

ok sorry its this one like he said.

Yoda · 05-21-2009, 04:03 PM

Quote:

Originally Posted by marcus

there

clockwise? anticlockwise? how much of a turn?
o and is it an actual screw cause there is none...

*tk-421* · 05-21-2009, 04:59 PM

Quote:

Originally Posted by marcus

there

That's not the idle screw. It's this one (covered in epoxy here):

You'll need a small allen wrench to turn it BTW. As far as CW/CCW, I can't remember... I believe I ended up turning it CW almost all the way.

Yoda · 05-21-2009, 06:05 PM

Quote:

Originally Posted by tk-421

That's not the idle screw. It's this one (covered in epoxy here):

You'll need a small allen wrench to turn it BTW. As far as CW/CCW, I can't remember... I believe I ended up turning it CW almost all the way.

ok kwel i will try it as is now then adjust later the rain lifted up sp let me finish installing it. It was hard as heck to get the afe coupler over the TB had to shave some off.

Yoda · 05-21-2009, 06:41 PM

so yea i installed it right. i was doing the whole coolant overflow thing and well it didnt. I waited for like 5 min and no overflow so i was like ok. No oscillation just high cold and when its warm it setlles at a high of 1100rpm and a CEL

Againg i said ok. Before i went to disconnect the battery i tried stepping on the throttle. This event was followed bu very very very slow climb in rpm. Again ok... So i floored it

Not a good idea didnt make a diff at all the car started shaking and i quickly turned it off. So yea the battery is disconnected and i will wait a ahwile before i see wat is up. Any ideas lol?

05-21-2009, 03:46 AM	#238
jkuchta View User's Garage Drives: 2007 Yaris hatch (red) Join Date: Sep 2007 Location: L.A. Posts: 557	Have you adjusted the idle screw? If you've turned the screw out too far you could get this code...try turning the screw in one or two turns (with the car off). This should fix the problem. If you haven't adjusted the idle set screw, turn it counter-clockwise 1.5 turns (with the engine off), and see what happens. Last edited by jkuchta; 05-21-2009 at 04:11 AM.

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05-21-2009, 12:53 AM	#235
MGargano Drives: 2009 Yaris Hatchback Join Date: Feb 2009 Location: NJ Posts: 792	The chip swap was working fine for me... no CEL or oscillation... until I had to disconnect the battery to swap the steering wheel. Once I reconnected, oscillation & CELs galore.

05-21-2009, 03:10 AM	#236
jkuchta View User's Garage Drives: 2007 Yaris hatch (red) Join Date: Sep 2007 Location: L.A. Posts: 557	What codes are showing up? Just saying you have a CEL is kind of worthless unless we know what the code is. It could be just a case of needing to adjust the idle set screw, or a number of other things.

05-21-2009, 09:41 AM	#240
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	any one has a DYI on how to install the TB? I am looking through tha manuall and drawing a blank. Do i need anything special?

05-21-2009, 06:41 PM	#252
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	so yea i installed it right. i was doing the whole coolant overflow thing and well it didnt. I waited for like 5 min and no overflow so i was like ok. No oscillation just high cold and when its warm it setlles at a high of 1100rpm and a CEL Againg i said ok. Before i went to disconnect the battery i tried stepping on the throttle. This event was followed bu very very very slow climb in rpm. Again ok... So i floored it Not a good idea didnt make a diff at all the car started shaking and i quickly turned it off. So yea the battery is disconnected and i will wait a ahwile before i see wat is up. Any ideas lol?