Cold Start Up?
Thread Starter
TECH Apprentice
iTrader: (5)
Joined: Apr 2004
Posts: 399
Likes: 0
From: San Diego, Ca
Cold Start Up? Since I changed my base spark tables, it seems whenever I first start my car, the idle jumps up to 1800 and stays for about 5 seconds. I know that can't be good for the motor. The reason I changed the tables was for the bucking and surging when my cam went in(TR224).
Here is what the table looks like.
Too much?
Thanks,
Jason
Here is what the table looks like.
Too much?
Thanks,
Jason
Trending Topics
you will have to retune, but thats easy. What is it your having problems with and what exactly are you trying to tune? I dont get how the zo6 timing tables are lower than your stock 98 ones....i would think that the zo6 would be slightly higher even though they have better flowing heads.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'
Brett Foote
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
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!
mine will do the same but not so high, it runs about 1400 for like 15 sec till it gets warm. but im on stock tune with full bolt-ons and a powerdyne kit...yes im an idiot and need a tune
Thread Starter
TECH Apprentice
iTrader: (5)
Joined: Apr 2004
Posts: 399
Likes: 0
From: San Diego, Ca
Originally Posted by chrisj6
startup airflow might could go down some, but what about reducing the startup flare spark control some?
Chris
Chris
I did that, per another member of the board.
maybe I didn't lower it enough? I lowered it to, -25 and -30(I think). Could I go lower?
I will post it when I get home from work.
Thanks for the ideas...
Jason
Thread Starter
TECH Apprentice
iTrader: (5)
Joined: Apr 2004
Posts: 399
Likes: 0
From: San Diego, Ca
Originally Posted by ninobrn99
you dont think that the throttle body blade is getting stuck open do ya?
I checked the TPS sensor before I start the car, it was at 16%. I was told it would not read 0%.
no, they dont read 0. spray it with some carb cleaner because think about it. If its on a cold start, then if its dirty, the dirt thats in there, if any has settled. Im sure its the tune, but just to be sure its not mechanical.
Blown Interceptor, Do you think you can scan this problem and then attach it here or send it to me? dsuthar@adelphia.net.
Scan the regular data as well as LTIT, STIT, Desired Idle Airflow, Spark and O2s. Try to stay under 24 so we can get more samples/sec.
Dixit
Scan the regular data as well as LTIT, STIT, Desired Idle Airflow, Spark and O2s. Try to stay under 24 so we can get more samples/sec.
Dixit
Thread Starter
TECH Apprentice
iTrader: (5)
Joined: Apr 2004
Posts: 399
Likes: 0
From: San Diego, Ca
Originally Posted by Dixit
Blown Interceptor, Do you think you can scan this problem and then attach it here or send it to me? dsuthar@adelphia.net.
Scan the regular data as well as LTIT, STIT, Desired Idle Airflow, Spark and O2s. Try to stay under 24 so we can get more samples/sec.
Dixit
Scan the regular data as well as LTIT, STIT, Desired Idle Airflow, Spark and O2s. Try to stay under 24 so we can get more samples/sec.
Dixit
I actually looked at your file. It looks like you changed your flare start up control and startup airflow?
Sending my idle start up to your email.
Thanks,
Jason
Thread Starter
TECH Apprentice
iTrader: (5)
Joined: Apr 2004
Posts: 399
Likes: 0
From: San Diego, Ca
Originally Posted by P Mack
What about reducing your running airflow tables for those ect values? What are your idle trims reading after the 5-10 seconds when it returns to normal?
I did the idle Procedure twice, each time it lowered. Here is my last idle log.
Okay heres what I see right off the bat, your LTIT is maxxed out at -3.00. Your STIT almost drops to -2.00+ as well. It seems like your RAF table is WAY too high. Do this. Start from a cold start and log the Idle Desired Airflow in one of your histograms. And use the Base Running Airflow as the labels. And once you get upto almost 180F then take that data and paste it into the RAF table and try it again. Cause it seems like you are way off on that. Remember to turn your AC off and FANs off when you do the logging. And remember it will take 5mins for the LTIT to start learning so it wont take effect immediately, you will have to let it idle after startup for at least 10mins to get it to come back to 0.
Dixit
Dixit