Default Idle problems can someone help me
Thread Starter
11 Second Club
Joined: Aug 2004
Posts: 891
Likes: 0
From: minneapolis,mn
Idle problems can someone help me I have a 06 gto I'm tuning with a ms4 cam 239/242, .649"/.609" 111lsa. The car will not return to idle without surging. The rest of the tune is pretty good but thius is just getting frustrating. I've tried to fix this for hours now and can't figure out what I'm missing heres the tune if anyone can take a look at it to try to help.
Last edited by 1MEANGTO; Aug 6, 2007 at 11:29 PM.
If you are an experienced tuner, I don't know what to tell you. If you are still learning there are some steps to make it easier. Bump your idle up 2 or 3 hundred rpm. Not permanently, just as a part of the process. Adjust your desired airflow, throttle cracker, throttle follower tables, etc., until it works OK. Once that works, drop the idle down a bit and repeat. This is a VERY slow trial and error process, but in the end you will have a good running car and a much better understanding of what you did to get there. It is hard to overemphasize the importance of going back to basics when stumped by a problem.
Thread Starter
11 Second Club
Joined: Aug 2004
Posts: 891
Likes: 0
From: minneapolis,mn
I'm pretty experienced but the E40 ls2 pcm's don't even have throttle follower or cracker tables. I've been working with the desired idle airflow and changed most of the idle tables with no luck yet it just doesn't want to IDLE!! It seams not to really respond to anything. Sometimes the changes will help for the first couple of clutch push ins and then it just gets worse the more you drive.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
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!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
did you try the idle in park and drive spark tables? i've played with those. set the overspeed/underspeed tables to all zeros. smoothed out the IAC steps vs effective area and increased the IAC park position airflow. this has helped with using the idle spark tables as being the best cure.
i'm not smart at this at all. just giving you ideas an where to work the tune.
i'm not smart at this at all. just giving you ideas an where to work the tune.
I'm sure you already have, but have you tried putting the car in open loop to eliminate fuel correction problems? Also, have you tried disabling the maf to make sure reversion isn't screwing with its readings?
DUnno what they are called in EFIL, but look for the integral and proportional steps the control loop uses; reducing the numbers will slow the response of the control loop and generally helps get rid of that hard loping some...
Originally Posted by 1MEANGTO
Well I spent several more hours on the car and got some help from a guy in Australia and the car runs like it doesn't even have a cam.
