DIY - 1.8L 1ZZ-FE TB Connector Chip Swap - Page 12 - Toyota Yaris Forums

Gideon · 05-10-2009, 07:50 PM

Maybe you have a bad TB or the idle screw was messed with too much? (I didn't bother touching mine.)

I never did the chip swap on mine (too lazy). Coolant bypass (didn't bother to bleed it) and only have high idle when cold and of course my CEL is always on. (For about 700 miles now)

Mine does stick a bit it seems, RPMs hang for a few when slowing quickly to a stop (usually to go over speedbumps).

No oscillation, except when I first installed it. That was fun trying to avoid looking like a douchebag revving at every light. (For the 100 miles I had that issue I would just put the car into gear quickly to bring the car's RPMs down to normal and then release.)

*tk-421* · 05-10-2009, 10:24 PM

Quote:

Originally Posted by Gideon

Mine does stick a bit it seems, RPMs hang for a few when slowing quickly to a stop (usually to go over speedbumps).

Yup I get the stuck throttle at times as well. Cold idle too, but no CEL yet.

kustom play · 05-10-2009, 10:37 PM

my CEL is now off and looks like its staying off

it hasnt popped back on yet, im feeling lucky

but i havent had any issues with stuck throttle or anything like that

PHXDEMON · 05-11-2009, 12:03 AM

Quote:

Originally Posted by Gideon

Maybe you have a bad TB or the idle screw was messed with too much? (I didn't bother touching mine.)

I never did the chip swap on mine (too lazy). Coolant bypass (didn't bother to bleed it) and only have high idle when cold and of course my CEL is always on. (For about 700 miles now)

Mine does stick a bit it seems, RPMs hang for a few when slowing quickly to a stop (usually to go over speedbumps).

No oscillation, except when I first installed it. That was fun trying to avoid looking like a douchebag revving at every light. (For the 100 miles I had that issue I would just put the car into gear quickly to bring the car's RPMs down to normal and then release.)

I bought the TB off of m911gt who was selling it because of the same issue. I did the chip swap on it so that rules out a bad chip. Fucking with the idle screw is the only thing I have yet to do because I don't see why that would cause anything other than a too high/too low idle. Plus after I installed it I drove to work and back (50 mile round trip) and it ran flawlessly other than hanging to RPMs a little bit but it sure as hell wasnt oscillating. Also this entire time I have yet to actually get a check engine light

You would tend to think with the motor ranging from 1-3/4k rpm it would throw a code. I think my ECU is just being a stuck up whore

PHXDEMON · 05-11-2009, 12:05 AM

Also Gideon did yours oscillate right off the start? Did it come and go? Or was it just oscillation constant for first 100 miles and then it went away? How hard did you drive it for thos efirst 100?

PHXDEMON · 05-11-2009, 12:07 AM

Possibly you guys running with CELs are in open loop vs closed loop and that's why you aren't getting oscillation

Gideon · 05-11-2009, 12:29 AM

Quote:

Originally Posted by PHXDEMON

Also Gideon did yours oscillate right off the start? Did it come and go? Or was it just oscillation constant for first 100 miles and then it went away? How hard did you drive it for thos efirst 100?

Yeah, it oscillated every time I let the engine go back to idle initially and it was for only 20 miles or so. In that 20 miles I ran it to redline every chance I could. (After the engine was properly warmed up of course)

PHXDEMON · 05-11-2009, 12:36 AM

Quote:

Originally Posted by Gideon

Yeah, it oscillated every time I let the engine go back to idle initially and it was for only 20 miles or so. In that 20 miles I ran it to redline every chance I could. (After the engine was properly warmed up of course)

So I need to start driving like a ricer

Also was it really jerky every time you applied/let off the gas? Like on the freeway I hit the gas but it steadily accelerates so I have to let off and every time I take my foot off/put it back on the gass it jerks like a motherfucker.

Gideon · 05-11-2009, 12:56 AM

Yeah it was pretty jerky initially.

It still is really jerky if the engine is cold, but once it warms up it ceases.

PHXDEMON · 05-11-2009, 02:29 AM

Quote:

Originally Posted by Gideon

Yeah it was pretty jerky initially.

It still is really jerky if the engine is cold, but once it warms up it ceases.

Mine keeps getting worse and worse. Jerky as fuck even when the sngine is warm and the oscillation is progressively getting worse.

PHXDEMON · 05-11-2009, 04:53 PM

okay so the idle screw was all the way in and I backed it up as far as I could. Let the car idle for about 10 minutes and slowly the idle smoothed out completely

While driving I am still getting some jerkyness and moderate oscillation (1-2k) at stop lights but nowhere near as bad as it was. It seems the ECU is actually trying to learn the new throttle body now instead of just being a whore about it. Hopefully it will smoothe itself out some more as I drive it more.

marcus · 05-11-2009, 05:59 PM

hope that fixes ur issue..

PHXDEMON · 05-11-2009, 06:06 PM

Quote:

Originally Posted by marcus

hope that fixes ur issue..

Oh believe me so do I

Hell I can even live with how it is now it's just that pegging from 1-4k nasty oscillation was horrible. The car was almost undrivable

eii · 05-11-2009, 07:49 PM

Quote:

Originally Posted by PHXDEMON

Correct others have plugged them I just left them as is. Just go down to a lowes/home depot/etc and get a coupler barb for 3/8 inch ID vinyl tubing and you are food to roll. Stock clamps work and everything just need the barb.

FYI, I'm always food to roll..always.

PHXDEMON · 05-11-2009, 08:01 PM

Quote:

Originally Posted by eii

FYI, I'm always food to roll..always.

Did you do the bypass?

PHXDEMON · 05-12-2009, 12:36 AM

Yay my motor is finally running half decent and I got a CEL

AlexNet0 · 05-12-2009, 07:06 AM

Quote:

Originally Posted by PHXDEMON

Yay my motor is finally running half decent and I got a CEL

that must mean its working!

marcus · 05-12-2009, 11:17 AM

Quote:

Originally Posted by PHXDEMON

Yay my motor is finally running half decent and I got a CEL

nice.. so ur saying it idles the same as stock and no oscillations.. what about start up how high does it warm up to..

no wwe jsut need to kill the cel ..

05-10-2009, 10:37 PM	#201
kustom play pink wheels are cool View User's Garage Drives: 07 liftback Join Date: Oct 2008 Location: Phoenix Posts: 1,407	my CEL is now off and looks like its staying off it hasnt popped back on yet, im feeling lucky but i havent had any issues with stuck throttle or anything like that __________________ http://www.4055design.com

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05-10-2009, 07:50 PM	#199
Gideon ★weeaboo★ View User's Garage Drives: 2008 Bayou LB Join Date: Oct 2008 Location: Sunnyvale, CA Posts: 661	Maybe you have a bad TB or the idle screw was messed with too much? (I didn't bother touching mine.) I never did the chip swap on mine (too lazy). Coolant bypass (didn't bother to bleed it) and only have high idle when cold and of course my CEL is always on. (For about 700 miles now) Mine does stick a bit it seems, RPMs hang for a few when slowing quickly to a stop (usually to go over speedbumps). No oscillation, except when I first installed it. That was fun trying to avoid looking like a douchebag revving at every light. (For the 100 miles I had that issue I would just put the car into gear quickly to bring the car's RPMs down to normal and then release.)

05-11-2009, 12:05 AM	#203
PHXDEMON View User's Garage Drives: 2007 Red Liftback Join Date: Oct 2008 Location: Phoenix, AZ Posts: 885	Also Gideon did yours oscillate right off the start? Did it come and go? Or was it just oscillation constant for first 100 miles and then it went away? How hard did you drive it for thos efirst 100?

05-11-2009, 12:07 AM	#204
PHXDEMON View User's Garage Drives: 2007 Red Liftback Join Date: Oct 2008 Location: Phoenix, AZ Posts: 885	Possibly you guys running with CELs are in open loop vs closed loop and that's why you aren't getting oscillation

05-11-2009, 12:56 AM	#207
Gideon ★weeaboo★ View User's Garage Drives: 2008 Bayou LB Join Date: Oct 2008 Location: Sunnyvale, CA Posts: 661	Yeah it was pretty jerky initially. It still is really jerky if the engine is cold, but once it warms up it ceases.

05-11-2009, 04:53 PM	#209
PHXDEMON View User's Garage Drives: 2007 Red Liftback Join Date: Oct 2008 Location: Phoenix, AZ Posts: 885	okay so the idle screw was all the way in and I backed it up as far as I could. Let the car idle for about 10 minutes and slowly the idle smoothed out completely While driving I am still getting some jerkyness and moderate oscillation (1-2k) at stop lights but nowhere near as bad as it was. It seems the ECU is actually trying to learn the new throttle body now instead of just being a whore about it. Hopefully it will smoothe itself out some more as I drive it more.

05-11-2009, 05:59 PM	#210
marcus toyota View User's Garage Drives: 2007 Yaris RS Blazed Join Date: Oct 2006 Location: toronto, canada Posts: 3,637	hope that fixes ur issue..

05-12-2009, 12:36 AM	#214
PHXDEMON View User's Garage Drives: 2007 Red Liftback Join Date: Oct 2008 Location: Phoenix, AZ Posts: 885	Yay my motor is finally running half decent and I got a CEL