high idle
high idle hey guys, i just finished tapping my brothers car, a 2001 ta, with h/c, and this is wat i saw:
current idle:1050-1175
temp: 180ish
tps: .0-.3
Iac: 188-190
set idle: 950
its an automatic car and it idles high. Sometimes on start up it will search for a idle around 600-1000 but go up to 1150-1200 on the tach.
me and my brother with the autotap are new to this so bare with us. Wat do ya'll think?
current idle:1050-1175
temp: 180ish
tps: .0-.3
Iac: 188-190
set idle: 950
its an automatic car and it idles high. Sometimes on start up it will search for a idle around 600-1000 but go up to 1150-1200 on the tach.
me and my brother with the autotap are new to this so bare with us. Wat do ya'll think?
from wat ive seen, is the iac to high for idle? If so, if i adjust the idle screw or drill the tb, this will loer the iac counts right? wat kind of porblems do anyone of you guys see?
thanks
thanks
yes, its tuned for a h/c and yes, it says up when warm. We are having a hars time with this hand it seems like its not our week.
i dont want to drill the tb but i dont how i could check the sensors to se if they are bad.
could it be a o2 sensor? tps, iac? im stumped guys.........
i dont want to drill the tb but i dont how i could check the sensors to se if they are bad.
could it be a o2 sensor? tps, iac? im stumped guys.........
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
Originally Posted by Ragtop 99
Unusual. Normally iac drops to zero when you are getting too much air. Here it appears that the computer is adding air via the IAC.
any sense?
Originally Posted by CATDIESEL
can you see desired idle on auto tap? is it lower than actual idle. possibly a vacuum leak (TB gasket, egr prob, intake gasket, pcv hose or valve
we did look over the seals but ere gonna check again....is there a gauge tool that can help me do this without checking every line?
I think there is? i just remember wat its called...
he replaced his valve covers and before, the pcv hoses that join together in the back weretorn apart, behind the manifold. It looked like heat destroyed the hoses back there.....
besides that, this could very well be a stupid vacuum leak and we're just chasing our own tails.....
now the actually, pvc valve, i havent gone near it bt how wold i know if its gone bad?
besides that, this could very well be a stupid vacuum leak and we're just chasing our own tails.....
now the actually, pvc valve, i havent gone near it bt how wold i know if its gone bad?
I had a high idle problem caused in part by air coming through the PCV line into the intake manifold. I discovered it by crimping the line and seeing my idle drop.
Last edited by Ragtop 99; Mar 17, 2005 at 10:10 AM.
im gonna try that.....
i never thought about that. how much did you crip to make it work? did you use on of those metal o rings with the screw to decrease the size... (dude, im not sure wat its called..sorry!!!)
i never thought about that. how much did you crip to make it work? did you use on of those metal o rings with the screw to decrease the size... (dude, im not sure wat its called..sorry!!!)
TECH Apprentice
Joined: Jan 2002
Posts: 364
Likes: 0
From: Princeton, IN
Log the strims and ltrims... with the car warmed up give it a rev to 2k and then let off the gas
If the ltrims jump up to like 10 -15+% then you might have a vacuum leak.
I have messed with my idle a lot and if the blade is close all the way and you had 100+ iac steps your idle should be right “the iac would have full control over your idle” but 100+ steps are not good.
I would also try to use the set screw and open the blade a little more… iac steps should go down and idle should stay the same until you open the blade to the point it no longer needs the iac to keep the idle. If you do get to this point close it a little more “ until your steps are around 30-40 in park.
I have found mine idles best at 40 iac in park and that puts me at about 15 to 10 iac steps in drive.
If the ltrims jump up to like 10 -15+% then you might have a vacuum leak.
I have messed with my idle a lot and if the blade is close all the way and you had 100+ iac steps your idle should be right “the iac would have full control over your idle” but 100+ steps are not good.
I would also try to use the set screw and open the blade a little more… iac steps should go down and idle should stay the same until you open the blade to the point it no longer needs the iac to keep the idle. If you do get to this point close it a little more “ until your steps are around 30-40 in park.
I have found mine idles best at 40 iac in park and that puts me at about 15 to 10 iac steps in drive.
Last edited by dissonance; Mar 18, 2005 at 08:31 AM.