Ported and polished TB, now high revs in gear?
#1
On The Tree
Thread Starter
Join Date: Apr 2008
Location: Folkston,Ga
Posts: 132
Likes: 0
Received 0 Likes
on
0 Posts
Ported and polished TB, now high revs in gear?
Hi guys i have a 2007 sierra crew cab 5.3 with a K&N CAI, flowmasters, and recently a P&P throttle body. Now the problem.....
I ported and polished my throttle body last night to a mirror shine in the rough cast areas. I did not touch the factory machined areas used for idle control. Looked great.... But now while im in gear and i let off the gas i get a high idle?
Kinda strange because while im at a complete stop the idle will be fine. I also noticed that while going down the road at the high idle if you put the truck in neutral the revs will go to like 2,000 and stay there with what sounds like spark knock untill you pull it back into gear.
I do not have a tune yet but and i assume this could be corrected with one?
And if I choose to get a mail order what will I need to tell them to adjust so they get it right the first time.
I ported and polished my throttle body last night to a mirror shine in the rough cast areas. I did not touch the factory machined areas used for idle control. Looked great.... But now while im in gear and i let off the gas i get a high idle?
Kinda strange because while im at a complete stop the idle will be fine. I also noticed that while going down the road at the high idle if you put the truck in neutral the revs will go to like 2,000 and stay there with what sounds like spark knock untill you pull it back into gear.
I do not have a tune yet but and i assume this could be corrected with one?
And if I choose to get a mail order what will I need to tell them to adjust so they get it right the first time.
#5
Moderator
iTrader: (16)
a "relearn" will do nothing but waste your time.
the truck needs to be tuned. the blade of the tb is actually opened more in stock form to let more air in to idle, the humps cause this. now that you have the humps removed the blade is still set at the same open position as it was with the humps, and it is going to idle higher bc it thinks that the humps are still there deflecting air when really its not.
more air into the tb the higher the rpm.
just my .02
the truck needs to be tuned. the blade of the tb is actually opened more in stock form to let more air in to idle, the humps cause this. now that you have the humps removed the blade is still set at the same open position as it was with the humps, and it is going to idle higher bc it thinks that the humps are still there deflecting air when really its not.
more air into the tb the higher the rpm.
just my .02
#7
On The Tree
Thread Starter
Join Date: Apr 2008
Location: Folkston,Ga
Posts: 132
Likes: 0
Received 0 Likes
on
0 Posts
a "relearn" will do nothing but waste your time.
the truck needs to be tuned. the blade of the tb is actually opened more in stock form to let more air in to idle, the humps cause this. now that you have the humps removed the blade is still set at the same open position as it was with the humps, and it is going to idle higher bc it thinks that the humps are still there deflecting air when really its not.
more air into the tb the higher the rpm.
just my .02
the truck needs to be tuned. the blade of the tb is actually opened more in stock form to let more air in to idle, the humps cause this. now that you have the humps removed the blade is still set at the same open position as it was with the humps, and it is going to idle higher bc it thinks that the humps are still there deflecting air when really its not.
more air into the tb the higher the rpm.
just my .02
Trending Topics
#8
TECH Enthusiast
It will adjust itself if you drive it for 30 miles.. If you don't wanna wait just get a relearn test.. I F up and bought a whole new tb unit etc... When I just need a relearn test..
#10
Launching!
iTrader: (1)
Join Date: Jun 2009
Location: Washington DC/NoVa
Posts: 205
Likes: 0
Received 0 Likes
on
0 Posts
P and P doesnt necessarily mean that you are removing ALL excess material. But it certainly means that youre going to improve it over stock, even if it's less than what some others would remove