GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

Idle With 112 Cam.

Thread Tools
 
Search this Thread
 
Old Mar 20, 2005 | 07:35 AM
  #1  
one03sierra's Avatar
Thread Starter
Formerly one92rs
iTrader: (1)
 
Joined: Apr 2003
Posts: 4,205
Likes: 1
From: league city texas
Talking Idle With 112 Cam.

ok i need to have some ideas on how to get this thing to idle right. i have adjusted the throttle cracker,IAC count, and all the stuff i can think of. i was wanting to get it to idle without drilling another hole in the tb. lemme know how you got yours to idle. right now mine is set at 800 rpm's.
Reply
Old Mar 20, 2005 | 08:22 AM
  #2  
BigTex's Avatar
? ? ? ? ? ?
iTrader: (16)
 
Joined: Nov 2001
Posts: 7,126
Likes: 2
From: East of Dallas
Default

Didn't your Nelson tune get the idle straight? What are the symptoms?
Reply
Old Mar 20, 2005 | 08:49 AM
  #3  
Kano's Avatar
TECH Fanatic
iTrader: (3)
 
Joined: Oct 2003
Posts: 1,612
Likes: 0
From: Winston Salem NC
Default

pm me your email if you like and
I can send you a copy of the one he sent me
Not the same cam by any means but you may be able
to find something youre overlooking
youve got hptuners right?
Reply
Old Mar 20, 2005 | 09:33 AM
  #4  
storm5.3's Avatar
13 Second Truck Club
iTrader: (1)
 
Joined: Jun 2004
Posts: 870
Likes: 0
From: City by the Sea, Tx
Default

I wish you could of read my PCM, I did notice that every since I switched to the '02 PCM that when I crank up my truck seems to rev first then settle in. Before it used to just fire up and idle and not rev a little first and settle in. I don't know if that is the difference or not but it did die on me again last night as I was on my way out as I was coasting to a stop sign. Maybe it's loading up at low speed. This is how it use to crank...'99 PCM
Reply
Old Mar 20, 2005 | 09:41 AM
  #5  
litreddevil's Avatar
Banned
iTrader: (4)
 
Joined: Oct 2003
Posts: 5,151
Likes: 1
From: From Houma La. Living n Ellisville Miss.
Default

I try something that a friend read on here a while back we adj. the tb blade to 3 % and then unpluged the tps cycle the key for ten second then turn off 30 seconds then hookm the tps back up and may help may not it help both of us idles great now.
Reply
Old Mar 20, 2005 | 10:44 AM
  #6  
99Silver6.0's Avatar
TECH Veteran
iTrader: (1)
 
Joined: May 2002
Posts: 4,039
Likes: 1
From: Olathe, Kansas
Default

Heres something you can try Lance. It worked pretty well for my friends 112 he slapped in. It gave us a good starting point and we worked from there. Idles and starts like a champ now.

*From LS1Tuning.com*

Idle Limiters --> Idle Speed: 950

Idle Limiters --> IAC Park Position: Raise all points from 40C and up to 21

Idle Limiters --> Idle Air In Gear: All points 60C and up to 8.6

Fuel --> Main VE Table: Multiply column 400 rpm by 60. Multiply column 800 by 80. Multiply column 1200 by 90.

Ignition --> High Octane Table: Add 2 deg to all points 400 to 1000 RPM, .08 to .32 g/sec

Once done with this program, start the car and check for surging. If the car surges, unplug the IAC and see if the surging stops. If the surging stops follow below.

Idle Limiters --> Idle Air in Gear --> All points above 60C to 9.2

Take the car for a drive and check your idle. If the car goes on cruise control reduce the Idle Air in Gear Table .2 (further if necessary). If the idle holds at 2000 RPM for extended periods of time reduce the P/N Airflow Decay table for all points above 10 MPH by 5% (multiply by 95) until this stops. Be vary careful on this table.

If car keeps surging with the IAC unplugged two more things to try.

Multiply Main VE table by another 95% (total reduction of 85%). Repeat until the surging goes away, or until the car begins to hesitate when you take off.

High Octane Ignition Table. Reduce timing for all points 400 to 1000 RPM, .08 to .32 g/sec by 2. Repeat, but don't reduce it any more than 6 degrees.
Reply
Old Mar 20, 2005 | 11:53 AM
  #7  
Flyer's Avatar
TECH Senior Member
iTrader: (1)
 
Joined: Jan 2003
Posts: 9,342
Likes: 0
From: Armpit of East TX
Default

Originally Posted by BigTex
Didn't your Nelson tune get the idle straight? What are the symptoms?


Don't adjust the throttle cracker. That's got next to nothing to do with the idle quality. It will cause other problems though.

If you really want the help PM me and I'll try and step you through it.
Reply
Old Mar 20, 2005 | 11:57 AM
  #8  
one03sierra's Avatar
Thread Starter
Formerly one92rs
iTrader: (1)
 
Joined: Apr 2003
Posts: 4,205
Likes: 1
From: league city texas
Talking

i was just triing a few things. i have changed so many cams that i have hptuners right now. i was just going to try to get it myself. the most problem is the dying when in reverse. or the dip that it doesnt recover from. then it will not start unless you give it gas. yes i am sure allen can send me a file. but i would really like to get it myself. if not i will get a file from allen. thanks everyone and keep them coming. i will be truying all this today.

oh yay i really need to get this going so my wife can drive it while her ford is in the shop. yay i know she had it when we met. and it is under warranty.

flyer ill pm you in a bit if you are still on.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bearden86
GM Engine & Exhaust Performance
26
Nov 15, 2015 03:58 PM
JordanH
WTB (Wanted To Buy)
4
Nov 6, 2015 07:42 PM
BlownHD
GM Engine & Exhaust Performance
4
Oct 3, 2015 12:24 PM
Jake75
GM Parts Classifieds
5
Oct 2, 2015 02:28 PM
02AWDAWSDenali
GM Engine & Exhaust Performance
2
Oct 1, 2015 05:08 PM




All times are GMT -5. The time now is 10:13 AM.