Ported TB, now idling higher.
Thread Starter
Staging Lane
Joined: Feb 2004
Posts: 82
Likes: 0
Ported TB, now idling higher. I just swapped out my stock TB for a Jantzer Ported TB, and the car idles around 1100-1200 now.
It has a bigger hole than my stock TB, so I'm thinking that may be the issue. Also wondering if the car needed time to re-learn everything after the swap.
If it is just the larger hole in the ported TB plate, can I correct it without tuning, or do I need tuning software to bring it back down to a reasonable level?
Thanks for the help in advance
It has a bigger hole than my stock TB, so I'm thinking that may be the issue. Also wondering if the car needed time to re-learn everything after the swap.
If it is just the larger hole in the ported TB plate, can I correct it without tuning, or do I need tuning software to bring it back down to a reasonable level?
Thanks for the help in advance
TECH Regular
Joined: Sep 2004
Posts: 404
Likes: 0
From: Raleigh, NC
My car learned idle after a few minutes when I ported mine. Try adjusting the idle screw. It the hole is bigger the car may be able to adjust, but swapping throttle blades may help fix the problem as well. Lock tight the two screws if you replace the the blade. You might also reset the TPS as well, but probably is not causing the high idle.
Originally Posted by Crazy Man
Swap the blade 
Or you can epoxy up the hole in the blade and drill a smaller one...
Or you can epoxy up the hole in the blade and drill a smaller one...Take off the idle air controll and make sure the o-ring is in place. They like to get stuck inside the throttle body you removed it from and are easily missed.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
Staging Lane
Joined: Feb 2004
Posts: 82
Likes: 0
Originally Posted by TheBlurLS1
I'm not sure sure this is a good idea. I wouldnt like to drive around with big chunk of epoxy geting slammed open and shut just begging break loose and get sucked in. Swap the blades or buy a new one if you need to. I would try and adjust the screw first. Might want to get out a volt meter for the TPS and find out what it should be at for idle (completly closed). That will tell you if its where it needs to be or not.
Take off the idle air controll and make sure the o-ring is in place. They like to get stuck inside the throttle body you removed it from and are easily missed.
Take off the idle air controll and make sure the o-ring is in place. They like to get stuck inside the throttle body you removed it from and are easily missed.
I'm pretty sure the problem is the idle screw, it's really high on the ported TB, and really low on the stock one. I switched over to the stock TB again just so I can get to work safely tomorrow without having my car idling at 1500rpm in rush-hour traffic.
I'll adjust the screw tomorrow or the next day and see what happens. I'll definitely use a volt meter when I do it.
Thanks again guys for the suggestions.
TECH Addict
iTrader: (6)
Joined: Dec 2001
Posts: 2,028
Likes: 0
From: sojourning....looking for my city whose builder and maker is God.
Originally Posted by TheBlurLS1
I'm not sure sure this is a good idea. I wouldnt like to drive around with big chunk of epoxy geting slammed open and shut just begging break loose and get sucked in.
Teching In
Joined: Jul 2005
Posts: 37
Likes: 0
Originally Posted by LS1Andrew
I think we have a winner.
I'm pretty sure the problem is the idle screw, it's really high on the ported TB, and really low on the stock one. I switched over to the stock TB again just so I can get to work safely tomorrow without having my car idling at 1500rpm in rush-hour traffic.
I'll adjust the screw tomorrow or the next day and see what happens. I'll definitely use a volt meter when I do it.
Thanks again guys for the suggestions.
I'm pretty sure the problem is the idle screw, it's really high on the ported TB, and really low on the stock one. I switched over to the stock TB again just so I can get to work safely tomorrow without having my car idling at 1500rpm in rush-hour traffic.
I'll adjust the screw tomorrow or the next day and see what happens. I'll definitely use a volt meter when I do it.
Thanks again guys for the suggestions.
[QUOTE=LS1Andrew]lol, I should have been paying attention...
Awesome illustration job!
I'm not very experienced with epoxy/JB weld. I have some on my car holding the plastic part onto the temp sensor, and it seems tough enough to do anything. I'm just the kind of person who would think about that every time the car started up, even if it was stronger in that spot than the rest of the TB 
If it really is that strong, my mistake for doubting it
Awesome illustration job!
Originally Posted by Lady Redhawk
CrazyMan knows what he is talking about, he has done quite a few Thottle Bodies. If the problem turns out to be the hole is too big, send him a pm and find out exactly what to use.
If it really is that strong, my mistake for doubting it