Long Tubes make GTO stumble at low speeds?
I put long tubes on my 6L GTO. Now it seems to stumble and surge slightly after I push in the clutch approaching a stop sign. Even worse if the air conditioner is on.
Throttle follower/cracker adjustment? I was thinking of adjusting the VE cells (B0200) to match from 1200rpm and below using the stock 1200rpm settings. Just wondering what you would do? I know it is probably an easy fix.
Chris
Driving a truck with a BLOWN engine has two meanings. I get to experience BOTH on a regular basis
2006 GTO....in progress
2002 6L/80E/Radix/ Tahoe
are your fuel trims positive ?
2000 NBM trans am.
427 Dart ship block,Lme ported Ls7 heads 12.5 compression
246/262 .730/.712 112+4 low lash solid roller
Rmvb 4l80 with transbrake, 8" FTI converter
12 bolt Moser rear end with 4.10 gears
I haven't logged anything yet. I will let you know when I get a chance to play with it.
Driving a truck with a BLOWN engine has two meanings. I get to experience BOTH on a regular basis
2006 GTO....in progress
2002 6L/80E/Radix/ Tahoe
Play with the Desired Airflow table under the idle section. I had to up mine to cure my swinging idle while moving problem. You might need to lower yours a bit.
2001 Camaro SS
Built 370 LQ9, Ported 243s, D-1SC 14 psi. 691 rwhp, 643 rwtq
Best time: 11.6@124 on nitto drags with a 2.1 60'
"if you're gonna build a time machine into a car, why not do it with some style." Dr. Emmett Brown
I was looking for that table but not sure which one it is.I don't have a throttle craker or follower in this OS either.....
I attached the tune if anyone wants to peak at it. At least tell me which table I should be adjusting..
Driving a truck with a BLOWN engine has two meanings. I get to experience BOTH on a regular basis
2006 GTO....in progress
2002 6L/80E/Radix/ Tahoe
It "might" be B1829 Minimum Idle Airflow. I only have experience with the LS1 PCM so maybe someone else can verify.
Also, 1710, 1711, 1712, 1713, 1714 probably should be modified after long-tubes. My car ran rich as hell after putting long tubes on. Lowering the O2 switch point table (as it's called in my PCM) 5-7% brought my AFR from 13.1 back up to 14.7. Obviously, you'll need a wideband to do this. Also, make small changes to those values because they are very sensitive.
2001 Camaro SS
Built 370 LQ9, Ported 243s, D-1SC 14 psi. 691 rwhp, 643 rwtq
Best time: 11.6@124 on nitto drags with a 2.1 60'
"if you're gonna build a time machine into a car, why not do it with some style." Dr. Emmett Brown
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