1JZGTE delete IACV
Thread Starter
1JZ Single SC400
iTrader: (59)
Joined: Jan 2009
Posts: 8,518
Likes: 17
From: Alabama, Roll Tide!
1JZGTE delete IACV
I have been thinking of deleting this on the intake throttle body on the 1JZ. Is this a good or bad thing, pro's and con's? I have heard it is a good thing due to the eliminating the possiblity of losing boost through this device. I just want to confirm this or leave it in place and keep the filter clean and an eye on the hoses leading to and from?
Thread Starter
1JZ Single SC400
iTrader: (59)
Joined: Jan 2009
Posts: 8,518
Likes: 17
From: Alabama, Roll Tide!
That's what I said exactly too. Mu buddy who come over awhile back stated possibly to remove for the reasons above. I wanted to further the discussion more by asking.
i haven't heard about losing boost through an IACV but it is possible. I think i remember seeing a member on Supramania deleting it by capping off the IACV port on his intake manifold, then cracking open the throttle using the idle speed screws on the throttlebody to create a controlled vacuum leak through his throttle. The only issue i can think of is the 1JZ ecu will freak out not being able to control idle air like it normally does.
Another option is to find a brand new IACV....seriously. It cost me a bit but toyota actually had one stocked in california when i needed one a year ago. Don't need to worry about it ever again
Another option is to find a brand new IACV....seriously. It cost me a bit but toyota actually had one stocked in california when i needed one a year ago. Don't need to worry about it ever again
Thread Starter
1JZ Single SC400
iTrader: (59)
Joined: Jan 2009
Posts: 8,518
Likes: 17
From: Alabama, Roll Tide!
I cleaned mine out very good with carb cleaner. This was the springs and small aluminum piece. Now if I could only figure out how it goes back together. I will definitely order a need air filter, it's black.. I will keep it for now unless someone says a different story.
http://planetsoarer.com/IAC/iac.htm
I don't remember if the 1JZ valve is similar construction but maybe it will be of use.
I don't remember if the 1JZ valve is similar construction but maybe it will be of use.
http://planetsoarer.com/IAC/iac.htm
I don't remember if the 1JZ valve is similar construction but maybe it will be of use.
I don't remember if the 1JZ valve is similar construction but maybe it will be of use.
Trending Topics
Thread Starter
1JZ Single SC400
iTrader: (59)
Joined: Jan 2009
Posts: 8,518
Likes: 17
From: Alabama, Roll Tide!
I bumped this old thread of mine to see if anyone has taking their IACV out and inspected it or replaced? I need to be certain the only thing inside this from the intake manifold is the filter and NO small springs or a metal pin?
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation
Joe Kucinski
Lexus LC500 Convertible Auction: A Preview of Rising Values?
Brett Foote
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler
Michael S. Palmer
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)
Joe Kucinski
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!
Brett Foote
Top 10 Reasons to Buy a Lexus TX 550h+ (& 3 Reasons to AVOID!)
Michael S. Palmer
Top 10 Lexus & Toyota Models of the 1990s RANKED!
Joe Kucinski
10 Great Toyotas That Could Have Been Lexus Models
Joe Kucinski
That means it is doing its job. There are pros and cons in keeping that IACV.
IF you have a well tuned aftermarket ECU , you can take it out. In high HP applications, at times they leak that is one reason they take it out. It is all really in how things are setup .....
It's main job is to regulate air during idling especially during startup . The the hissing noise can be regulated by routing the air back to the pipe before the turbo. I am sure you have a small filter now that is why you hear that hissing sound. Try replacing the kind of small air filter you have there that can muffle the sound.
IF you have a well tuned aftermarket ECU , you can take it out. In high HP applications, at times they leak that is one reason they take it out. It is all really in how things are setup .....
It's main job is to regulate air during idling especially during startup . The the hissing noise can be regulated by routing the air back to the pipe before the turbo. I am sure you have a small filter now that is why you hear that hissing sound. Try replacing the kind of small air filter you have there that can muffle the sound.
Thread
Thread Starter
Forum
Replies
Last Post
ankurdave
LS - 1st and 2nd Gen (1990-2000)
7
Mar 13, 2017 08:20 PM
