Cannot get TBI to idle down
01-09-2017, 04:33 PM
#1
Member
Thread Starter
Join Date: Nov 2002
Location: Port Orange Florida
Posts: 100
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 IROC
Engine: 350 CI Tuned Port
Transmission: Automatic
Axle/Gears: 3:45
Cannot get TBI to idle down
Could someone please take a look at my idle and IAC settings in this tunerpro file and see what I apparently am missing. This is for my 383 with a 213/219 camshaft and the idle just hangs up at about 1100 RPM no matter what I do. If I extend the IAC and unplug it the car will idle fine at 700RPM. But as soon as I give control back to the ECM I have a high idle. I have been trying to fix this for quite a while with no real success. Thanks Roy
01-09-2017, 04:54 PM
#3
Member
Thread Starter
Join Date: Nov 2002
Location: Port Orange Florida
Posts: 100
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 IROC
Engine: 350 CI Tuned Port
Transmission: Automatic
Axle/Gears: 3:45
Re: Cannot get TBI to idle down
Yes $42. The BLM is always within a few points of 128 when it is idling, usually right on the money.
01-09-2017, 05:04 PM
#5
Member
Thread Starter
Join Date: Nov 2002
Location: Port Orange Florida
Posts: 100
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 IROC
Engine: 350 CI Tuned Port
Transmission: Automatic
Axle/Gears: 3:45
Re: Cannot get TBI to idle down
I have really really really checked for vacuum leaks. It has about 20LBS vacuum at idle. It idles fine if I extend the IAC and unplug it. I even replaced the IAC thinking maybe it was not working right. What is cl ?
01-09-2017, 05:10 PM
#7
Member
Thread Starter
Join Date: Nov 2002
Location: Port Orange Florida
Posts: 100
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 IROC
Engine: 350 CI Tuned Port
Transmission: Automatic
Axle/Gears: 3:45
Re: Cannot get TBI to idle down
You mean my int/blm reading? My previous answer was referring to closed loop. Should I be tuning the idle in open loop? I haven't tried that.
Trending Topics
01-09-2017, 05:16 PM
#9
Member
Thread Starter
Join Date: Nov 2002
Location: Port Orange Florida
Posts: 100
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 IROC
Engine: 350 CI Tuned Port
Transmission: Automatic
Axle/Gears: 3:45
Re: Cannot get TBI to idle down
The CTS reading is about 85 when it is warmed up.
01-09-2017, 05:22 PM
#10
Member
Thread Starter
Join Date: Nov 2002
Location: Port Orange Florida
Posts: 100
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 IROC
Engine: 350 CI Tuned Port
Transmission: Automatic
Axle/Gears: 3:45
Re: Cannot get TBI to idle down
I don't see anything called throttle kicker would that be IAC kickdown steps? Mine is set at 23, I don't think I have done anything with that setting before. If you meant a mechanical throttle kicker, I dont have one of those.
Last edited by Fastmax; 01-09-2017 at 05:31 PM.
01-09-2017, 06:00 PM
#12
Member
Thread Starter
Join Date: Nov 2002
Location: Port Orange Florida
Posts: 100
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 IROC
Engine: 350 CI Tuned Port
Transmission: Automatic
Axle/Gears: 3:45
Re: Cannot get TBI to idle down
Tunerpro reads a/c not requested while the idle is sitting over 1100rpm but I will zero all those values out as an experiment