OK, I am lost. Can't get truck to idle!!!!! Pulling my hair out.

[willn]

I have put the initial tune on the truck and have played with ALL idle settings. I cannot get the truck to idle. It seems to idle without dying if I let it sit for a hour or more, but if I try it multiple times, it will fire and then just die. ANY help would be awesome as I am out of ideas......


I have a log attached. Don't know if it will help. The only way I could keep it running was to hold the throttle. If I let off, it will die.


Mods:

• 2001 LQ4 bored and stroked to 408.
• 317 Stock Heads with Comp Lifters and Comp Springs
• Wiseco dished 4.030" 9.5:1 CR pistons
• Comp 230/238 .600 .603 @ 114 (Spec'd by Comp to maintain towing ability)
• Melling High Volume, High Flow Pump
• Cloyes single timing set
• All new sensors in the block.
• Whipple 2300AX (want to get to about 10-15psi)
• Fully built 4L80E
• Circle D 278mm 4L80E Torque Converter 2800 stall
• Tru-Cool 40K Transmission cooler
• 1000cc at 43psi FIC Injectors, so with manifold referenced they are about 114lb/hr @ 58psi
• Pacesetter 1-7/8" LTs Tri-Armor with true dual 3" custom system
• Volant CAI with Scoop
• Intercooler Kit - CX Racing 31x12x4
• EFI Live V1 going to COS3 and SD tune.
• 34" Radiator w/ '05 Efans

Log_0001.efi
Sleeperado v.01.ctz

[joecar]

Have a read of the first two links:

Idle Tuning
showthread.php?4661-Idle-Tuning-Helpful-Info-Inside
showthread.php?14439-Idle-Tips-amp-Tricks
showthread.php?5866-Auto-VE-questions
showthread.php?14153-scan-tool-wont-log-rafig-or-rafpn
showthread.php?14435-Need-help-Can-Start-Car-but-dies-when-I-give-it-any-throttle-before-going-to-CL
showthread.php?7011-ETC-cars-and-IAC-parameters
showthread.php?14544-Working-on-my-idle-tune
showthread.php?14794-Help-with-open-loop-%28cold-start%29-tuning
showthread.php?149-Idle-%28Transition%29-Tuning
Stumble-3-seconds-after-cold-start&p=178921#post178921
Idle-Tips-amp-Tricks:post#46

More Idle Tuning
showthread.php?t=149
showthread.php?t=5866
showthread.php?p=86553 post #17
showthread.php?t=2630
showthread.php?t=473

Throttle Cracker/Follower
showthread.php?t=3568
showthread.php?t=4081
showthread.php?t=5406
showthread.php?t=5940

[willn]

Joe, I have been over and over those links. I have searched and searched the forums. Everything I change makes no difference.

I guess I am trying to determine if I have a mechanical issue or a tuning issue. The only thing that makes me think it is tuning is that if I let it sit for a hour or more, it will start and idle fine....

[willn]

Alright, I messed with the tune a little more and now it is idling. I am not sure what I changed that made it work, but it is. The next issue is that when I shift into gear, it dies.

Any ideas? Here is the newest tune with log.

Log_0004.efi
Sleeperado v.01.ctz

[statesman]

Have you done a C.A.S.E. learn?

[willn]

I have not because I couldn't get it to idle long enough...

Also, I thought that CASE was only if I was seeing misfires?

[statesman]

You said in your first post that you put in all new sensors... so I'm guessing you have a new crank angle sensor. I'm also guessing that you might have a new crank angle sensor error, which will need to be learned. Your first priority would be getting it to idle... does the exhaust smell fuelly when it is running?

[willn]

Yes, it does. According to the wideband I am getting pretty rich too. Like 10.5:1 to 11.5:1.

Yes, I did put all new sensors in. Would I be throwing any codes if it needed to be relearned?

[willn]

Ok, I am making a little progress. I am able to idle now, but I think I am getting too much fuel at some point. It will go into gear now, but when I give it gas and it comes back down to idle, it dies. Could this be throttle cracker?


Log_0006.efi

[willn]

Well, I guess I need to make smaller changes or something. It is now inconsistent on whether it will want to idle or not. The one thing I have noticed is that the commanded and actual AFR is off by a factor of around 2:1. What should I look for in the tune for this?

I am running OLSD.