DIY - 1.8L 1ZZ-FE TB Connector Chip Swap - Page 7 - Toyota Yaris Forums

MGargano · 04-21-2009, 08:14 PM

Quote:

Originally Posted by mikenacarato

i actually pulled the tubes out with some pliers for a cleaner look and polished it up. so yes they are open.

I capped mine. Think that's gonna make any difference?

AlexNet0 · 04-21-2009, 08:15 PM

^no, not unless you also capped the hoses.

MGargano · 04-21-2009, 08:17 PM

Quote:

Originally Posted by AlexNet0

^no, not unless you also capped the hoses.

lol no I used one of those barb couplers. I finally broke down and did the chip swap and coolant bypass. I have the gasket maker setting overnight and look forward to testing it out tomorrow morning.

*tk-421* · 04-22-2009, 01:41 AM

Quote:

Originally Posted by MGargano

lol no I used one of those barb couplers. I finally broke down and did the chip swap and coolant bypass. I have the gasket maker setting overnight and look forward to testing it out tomorrow morning.

Good luck! Hope that gets that problem solved on your end.

I'm also considering capping the (now useless) tubes... What did you use for that?

MGargano · 04-22-2009, 10:06 AM

Quote:

Originally Posted by tk-421

Good luck! Hope that gets that problem solved on your end.

I'm also considering capping the (now useless) tubes... What did you use for that?

Just a few inches of rubber tubing with a little brass plug on the end. I found the plug's at Lowe's in the same section as the barb union coupler.

t0m4s · 04-22-2009, 02:09 PM

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

marcus · 04-22-2009, 02:17 PM

[QUOTE=jkuchta;275971]As far as I can tell, the TB is heated to give better fuel economy. Why a cold charge would cause those problems is beyond me.

im assuming the high rev on cold start is due to oil being cool has to warm up ..

MGargano · 04-22-2009, 04:58 PM

No good so far. Oscillation is way worse at cold start up than before the chip swap and I got a CEL within 10 minutes of driving :(

marcus · 04-22-2009, 05:28 PM

Quote:

Originally Posted by MGargano

No good so far. Oscillation is way worse at cold start up than before the chip swap and I got a CEL within 10 minutes of driving :(

darn it!!

AlexNet0 · 04-22-2009, 05:50 PM

Quote:

im assuming the high rev on cold start is due to oil being cool has to warm up ..

its due to the open loop during warm up, a preset throttle position untill its warm and then it uses the sensors and activly adjusts it. the opening is 30 percent larger so the preset is automatically that much higher

*tk-421* · 04-22-2009, 06:02 PM

Quote:

Originally Posted by AlexNet0

its due to the closed loop during warm up, a preset throttle position untill its warm and then it uses the sensors and activly adjusts it. the opening is 30 percent larger so the preset is automatically that much higher

Do you think that will have an impact on engine life and/or MPG in the end? I really like this mod, but I may not keep it if it's doing any damage...

jkuchta · 04-22-2009, 06:39 PM

I'm still getting 37-38mpg per tank with the 1ZZ TB...and I've had it on for nearly 1000 miles so far.

AlexNet0 · 04-22-2009, 06:40 PM

Quote:

Originally Posted by camelll

I think you meant open loop during warm up.

lol yup *duh*

MGargano · 04-23-2009, 12:24 AM

Unless someone can convince me otherwise, I'm putting the stock TB back on tomorrow. I can handle the CEL but the oscillation is a little scary. After the chip swap, it oscillates very heavily from 2k to 3k for almost 2 minutes.

Yaris T-Sport. · 04-23-2009, 02:40 AM

Quote:

Originally Posted by MGargano

Unless someone can convince me otherwise, I'm putting the stock TB back on tomorrow. I can handle the CEL but the oscillation is a little scary. After the chip swap, it oscillates very heavily from 2k to 3k for almost 2 minutes.

do this, put the stock TB back and drive it for over a week with out doing and or trying anything at all and then swap the chip back to 1zz and try it again, this helps your ecu to remember the normal setup, then give it a fresh try after that. it worked for me.

yarstar · 04-23-2009, 07:40 AM

I concur with T-Sport. Giving it a 2nd try made it work for me too.

35-38 mpg now for 3k miles with new TB. No issues at all, except high cold idle. I really think it's worth it.

MGargano · 04-23-2009, 10:25 AM

I love the performance of the 1ZZ but the harsh oscillation is a killer. So I should reinstall the stock TB & chip for a week or so and then start over with the 1ZZ and chip swap?

yarstar · 04-23-2009, 11:19 AM

Quote:

Originally Posted by MGargano

I love the performance of the 1ZZ but the harsh oscillation is a killer. So I should reinstall the stock TB & chip for a week or so and then start over with the 1ZZ and chip swap?

That worked for me. You may be getting ocillation due to an air leak. Make sure you did the gasket maker correctly and really let it set up a long time (I let mine set up overnight). Check also the intake for leaks.

I pulled mine back off, waited a week, did the chip swap again, and re-installed and have had no probs since.

04-21-2009, 08:15 PM	#110
AlexNet0 View User's Garage Drives: '07 Yaris 3dr Join Date: Nov 2008 Location: Rockland, ME Posts: 1,638	^no, not unless you also capped the hoses. __________________ ---------- MI-YW ----------

04-22-2009, 02:09 PM	#114
t0m4s 1NZ-FE View User's Garage Drives: Yaris Seddan 08 Join Date: Oct 2008 Location: Panama Posts: 220	did everybody trim the OEM TB gasket to allow more air flow as t-sport did? __________________ . DC Sports Header, Vibrant Hi-Flow Cat, Round Magnaflow Muffler, Vibrant Tip, Dunlop Direzza 195/50 Rims 15", Injen Technologies Cold Air Intake, NST CR-Lite crank, waterpump & alternator pulleys, Tanabe NF210 Springs, NST SSK 1 & 2, NST Shifter Cable & Cage Bushing Kit, Nitto Engine Torque Damper

04-23-2009, 07:40 AM	#124
yarstar View User's Garage Drives: 2008 Absolute Red HB Join Date: Oct 2008 Location: Georgia Posts: 264	I concur with T-Sport. Giving it a 2nd try made it work for me too. 35-38 mpg now for 3k miles with new TB. No issues at all, except high cold idle. I really think it's worth it. __________________ AEM CAI, NST Pulleys/SSK, WR 4-2-1 Header, TRD axelback, R1 Concept Rotors, TRD Sway Bar, Nitto Rear Strut Bar, Cusco GT-Zero Coilovers, 1ZZ-FE 1.8L TB

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04-22-2009, 02:17 PM	#115
marcus toyota View User's Garage Drives: 2007 Yaris RS Blazed Join Date: Oct 2006 Location: toronto, canada Posts: 3,637	[QUOTE=jkuchta;275971]As far as I can tell, the TB is heated to give better fuel economy. Why a cold charge would cause those problems is beyond me. im assuming the high rev on cold start is due to oil being cool has to warm up ..

04-22-2009, 04:58 PM	#116
MGargano Drives: 2009 Yaris Hatchback Join Date: Feb 2009 Location: NJ Posts: 792	No good so far. Oscillation is way worse at cold start up than before the chip swap and I got a CEL within 10 minutes of driving :(

04-22-2009, 06:39 PM	#120
jkuchta View User's Garage Drives: 2007 Yaris hatch (red) Join Date: Sep 2007 Location: L.A. Posts: 557	I'm still getting 37-38mpg per tank with the 1ZZ TB...and I've had it on for nearly 1000 miles so far.

04-23-2009, 12:24 AM	#122
MGargano Drives: 2009 Yaris Hatchback Join Date: Feb 2009 Location: NJ Posts: 792	Unless someone can convince me otherwise, I'm putting the stock TB back on tomorrow. I can handle the CEL but the oscillation is a little scary. After the chip swap, it oscillates very heavily from 2k to 3k for almost 2 minutes.

04-23-2009, 10:25 AM	#125
MGargano Drives: 2009 Yaris Hatchback Join Date: Feb 2009 Location: NJ Posts: 792	I love the performance of the 1ZZ but the harsh oscillation is a killer. So I should reinstall the stock TB & chip for a week or so and then start over with the 1ZZ and chip swap?