Stalling issue in auto
06-07-2017, 11:02 PM
#1
Burning Brakes
Thread Starter
Stalling issue in auto
I've been having an issue with my car stalling when going up my trailer or into my driveway. It didn't always do this its a fairly new issue. I thought maybe my nitrous plate was leaking air at the gasket so i pulled it off and put the throttle body on and nothing changed. I'm posting this from my phone or else I'd attach some logs. If someone wants to see logs I can email them. Here's a quick video of the car stalling moving up my driveway.
mods are
2008 6-speed automatic w/ B&M stacked plate transmission cooler and Yank 3200 lockup stall converter
Engine-LS3
CMC-20 Camshaft (223/235 duration @ .050 .610/.620 with 1.7 ratio rocker arms 115.0 CL)
Trick Flow 255 LS3 heads
LS7 Lifters
Vararam Intake
Ported Thottlebody by Spinmonster
ported ls3 intake manifold.
Kooks long tube headers without cats
Bi-mode Mufflers
Comp Cams rocker arm trunion upgrade
DeWitts radiator
plus the nitrous kit
mods are
2008 6-speed automatic w/ B&M stacked plate transmission cooler and Yank 3200 lockup stall converter
Engine-LS3
CMC-20 Camshaft (223/235 duration @ .050 .610/.620 with 1.7 ratio rocker arms 115.0 CL)
Trick Flow 255 LS3 heads
LS7 Lifters
Vararam Intake
Ported Thottlebody by Spinmonster
ported ls3 intake manifold.
Kooks long tube headers without cats
Bi-mode Mufflers
Comp Cams rocker arm trunion upgrade
DeWitts radiator
plus the nitrous kit
Last edited by asd_srt; 06-07-2017 at 11:05 PM.
06-07-2017, 11:29 PM
#2
Burning Brakes
Thread Starter
I've attached 2 short logs of the car stalling.
The ETC % seems to drop and then timing shoots up right before it stalls. Also the O2s seem to both bottom out before the timing spikes up and the car stalls.
The ETC % seems to drop and then timing shoots up right before it stalls. Also the O2s seem to both bottom out before the timing spikes up and the car stalls.
Last edited by asd_srt; 06-07-2017 at 11:38 PM.
06-08-2017, 09:13 AM
#3
Race Director
Member Since: May 2004
Location: Raleigh, NC
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St. Jude Donor '15
Min airflow is too low IMO. Throttle is closing too far, timing is shooting up to try to correct for it but can't do enough to keep it running. It's mostly idling around 17% throttle but goes down to 12% there at the end right before it stalls
Given those numbers you might have to change it quite a large amount. Could also be the ETC min air multiplier if it's only happening at some engine coolant temps and not all the time.
Given those numbers you might have to change it quite a large amount. Could also be the ETC min air multiplier if it's only happening at some engine coolant temps and not all the time.
Last edited by schpenxel; 06-08-2017 at 09:14 AM.
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asd_srt (06-08-2017)
06-08-2017, 02:09 PM
#4
Burning Brakes
Thread Starter
Min airflow is too low IMO. Throttle is closing too far, timing is shooting up to try to correct for it but can't do enough to keep it running. It's mostly idling around 17% throttle but goes down to 12% there at the end right before it stalls
Given those numbers you might have to change it quite a large amount. Could also be the ETC min air multiplier if it's only happening at some engine coolant temps and not all the time.
Given those numbers you might have to change it quite a large amount. Could also be the ETC min air multiplier if it's only happening at some engine coolant temps and not all the time.
06-08-2017, 03:15 PM
#5
schpenxel to the rescue, again! That fella has forgotten more about tuning than most "tooners" will ever know - and he's not even forgetful!
06-08-2017, 05:55 PM
#6
Race Director
Member Since: May 2004
Location: Raleigh, NC
Posts: 16,664
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St. Jude Donor '15
I'm the most forgetful person I know 
Just ask the customers at my day job. I do appreciate it though.
Glad you got it sorted. Idle stuff can be a pain sometimes.
Just ask the customers at my day job. I do appreciate it though. Glad you got it sorted. Idle stuff can be a pain sometimes.
Last edited by schpenxel; 06-08-2017 at 05:55 PM.