1zz throttle body swap rev hang - Toyota Yaris Forums

remcafee · 11-30-2019, 01:48 AM

i recently did the 1zz throttle body swap and i did do the chip swap and i looped the coolant lines at the block to bypass it, anyone know how to get rid of the annoying rev hang that happens for like 3 seconds straight when you let go of the gas, its like its still goving it throttle even though you are not. 🥺

CrankyOldMan · 12-08-2019, 12:31 PM

I don't recall anyone having an issue with that before, but I may have missed it. Have you checked to make sure that the valve returns by itself and closes correctly? If it was used, it's possible that it's dirty/fouled and getting stuck.

remcafee · 12-08-2019, 07:08 PM

it is a used unit, i have cleaned it out with throttle body cleaner, you think it might be the way the airflow transitions into the maifold opening? it doesnt have a smooth flow going into manufold it just steps down you know what i mean? i also only tried it for about a mile or two, thrn i went to original, you think i would need to drive around more possibly?

alec801 · 12-16-2019, 06:00 AM

I also had this issue when I was using 1zz throttle body. I don't have any fix for it but I can confirm it is a common issue with this mod

remcafee · 12-18-2019, 08:27 PM

Quote:

Originally Posted by alec801

I also had this issue when I was using 1zz throttle body. I don't have any fix for it but I can confirm it is a common issue with this mod

yeah man its weird how long have you tried driving around with it? i wonder if it needs more time

11-30-2019, 01:48 AM	#1
remcafee Drives: 2007 Toyota Yaris 3 door Join Date: Sep 2018 Location: Arizona Posts: 425	1zz throttle body swap rev hang i recently did the 1zz throttle body swap and i did do the chip swap and i looped the coolant lines at the block to bypass it, anyone know how to get rid of the annoying rev hang that happens for like 3 seconds straight when you let go of the gas, its like its still goving it throttle even though you are not. 🥺

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12-08-2019, 12:31 PM	#2
CrankyOldMan 2ZR swap. DO IT! Ask how! View User's Garage Drives: 09 Meteoric Metallic HB Join Date: Feb 2011 Location: West Michigan Posts: 2,333	I don't recall anyone having an issue with that before, but I may have missed it. Have you checked to make sure that the valve returns by itself and closes correctly? If it was used, it's possible that it's dirty/fouled and getting stuck.

12-08-2019, 07:08 PM	#3
remcafee Drives: 2007 Toyota Yaris 3 door Join Date: Sep 2018 Location: Arizona Posts: 425	it is a used unit, i have cleaned it out with throttle body cleaner, you think it might be the way the airflow transitions into the maifold opening? it doesnt have a smooth flow going into manufold it just steps down you know what i mean? i also only tried it for about a mile or two, thrn i went to original, you think i would need to drive around more possibly?

12-16-2019, 06:00 AM	#4
alec801 Drives: aw11, ep91, ncp91 Join Date: Feb 2016 Location: sydney Posts: 7	I also had this issue when I was using 1zz throttle body. I don't have any fix for it but I can confirm it is a common issue with this mod