high idle/SES light after ported TB
Thread Starter
11 Second Club
iTrader: (8)
Joined: Aug 2004
Posts: 1,831
Likes: 0
From: Montgomery, IL
high idle/SES light after ported TB is this just the computer re-learning or not?
Drove a couple minutes the 1st day, no problems. Fired it up and reved a bit the 2nd day, no problems. 3rd day, wants to idle around 1100-1300RPMs. If I sit long enough (maybe 10-15 seconds) the idle will drop down to around 600-750RPMs. Once I get moving down the road, I can take my foot off the gas and coast at about 30MPH forever.
What do you guys think: computer re-learning, got a vaccum leak, needs a tune?
and no, i don't know what the code is yet, just popped on tonight
Drove a couple minutes the 1st day, no problems. Fired it up and reved a bit the 2nd day, no problems. 3rd day, wants to idle around 1100-1300RPMs. If I sit long enough (maybe 10-15 seconds) the idle will drop down to around 600-750RPMs. Once I get moving down the road, I can take my foot off the gas and coast at about 30MPH forever.
What do you guys think: computer re-learning, got a vaccum leak, needs a tune?
and no, i don't know what the code is yet, just popped on tonight
Thread Starter
11 Second Club
iTrader: (8)
Joined: Aug 2004
Posts: 1,831
Likes: 0
From: Montgomery, IL
ok, now that you bring that up, the TB is off a 98-99 which have a different opening cam, so i had a lot of extra slack, i used the adjustment sleeve to the max, the valve will go closed, but its just a hair short of full open
is your throttle body's plate have an idle hole that's been drilled out? when i picked up a ported tb, the person who had it drilled it out and this is exactly what happened to me. Just a waste of gas. Otherwise like the others said, check the cable, and compare the idle hole to that of your old tb, if you still have it.
so it hasnt been tuned? my car is tuned to idle at like 1200 or so, and then as the car warms up the idle drops. it takes a minute or two at the most for the idle to drop to normal though
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
11 Second Club
iTrader: (8)
Joined: Aug 2004
Posts: 1,831
Likes: 0
From: Montgomery, IL
Originally Posted by TheBlurLS1
DTC P0507 Idle Speed High
Did you make sure you replaced the IAC o-ring?
Did you make sure you replaced the IAC o-ring?
going to road test it here in a minute
Thread Starter
11 Second Club
iTrader: (8)
Joined: Aug 2004
Posts: 1,831
Likes: 0
From: Montgomery, IL
yea i still have the stocker, even tried switching shafts, no luck. talked to a few guys and one told me that if the guy wasn't carefull, you could port the TB oval shaped which would cause a problem, i was so annoyed with it, i just got done putting all the stock parts back on the stock TB and putting that back on
i also noticed on the ported TB that theres 2 spots were the dremel went over the valve blade seat
i also noticed on the ported TB that theres 2 spots were the dremel went over the valve blade seat
If it was ported on the blade seat, that's the problem. Depending on how big the hole is at least. Best bet is to port the stocker yourself and be careful. You might be able to get someone to tig it up and then get it right again.
Thread Starter
11 Second Club
iTrader: (8)
Joined: Aug 2004
Posts: 1,831
Likes: 0
From: Montgomery, IL
Originally Posted by TheBlurLS1
If it was ported on the blade seat, that's the problem. Depending on how big the hole is at least. Best bet is to port the stocker yourself and be careful. You might be able to get someone to tig it up and then get it right again.
make sure all sensors are hooked up, and make sure that the blade is sitting perfectly in place, which seems to a problem for most people...also make sure you didnt sand or grind down the area where the blade rests, because that could lead to idle problems...........
