Start up problems just started after a week of letting this thinkg sit. It takes a bit for it to turn over a few times and then it is a little rough getting going. Once going its fine. I did check the RAF and its on, Checked the MAF and VE both of those are good. What should I look at next?
99Z A4 w/ SS LT's, h/f cats, magnaflow catback, port/polish t/b, egr deleted, ls6 intake, lid, 3.73's, hpt, performabuilt level 1 tranny, 3600 stall, Stage 2.5 (5.3 heads), Torquer 2 cam, 42# reworked injectors, TR6 plugs.
2007 Avalanche LTZ - Catback and Eibach springs
Is it just the initial start up?
If so, I had to add some start up airflow to mine to get it to turn over and fire up quicker.
2016 GMC Sierra 1500 6.2L
open loop?tried turning on closed loop on start-up?starts better?
tsp LQ9 408, wiesco -10cc, ls7s cam,tsp 5.3Lheads ,stock rockers with upgraded trunions,BBK intake manifold;ported polished intake runners,80MM Tb,haltech CAI,Longtubes,RPM full drivetrain,3:15 gears.
I will try the camshaft revs down to 25 instead of 50 and see if that makes a difference. As for closed loop, I had it like that and was doing it then as well. Thats why I went back to check my maf, raf, and ve. they are still all close as you can see in the log.
99Z A4 w/ SS LT's, h/f cats, magnaflow catback, port/polish t/b, egr deleted, ls6 intake, lid, 3.73's, hpt, performabuilt level 1 tranny, 3600 stall, Stage 2.5 (5.3 heads), Torquer 2 cam, 42# reworked injectors, TR6 plugs.
2007 Avalanche LTZ - Catback and Eibach springs
I just tried dropping the timing a little and the 25 cam shaft revs and still up and downwith the idle. not a good start.
99Z A4 w/ SS LT's, h/f cats, magnaflow catback, port/polish t/b, egr deleted, ls6 intake, lid, 3.73's, hpt, performabuilt level 1 tranny, 3600 stall, Stage 2.5 (5.3 heads), Torquer 2 cam, 42# reworked injectors, TR6 plugs.
2007 Avalanche LTZ - Catback and Eibach springs
Any luck with the startup airflow?
2016 GMC Sierra 1500 6.2L
Started a little quicker (just added 2 across the board). It didn't stall but was still fumbeling a little. Going to bump it up a little more to see if that helps. Wondering if I should by my Camshaft revs back to 50 off drop that lower?Originally Posted by 99LS1SS
99Z A4 w/ SS LT's, h/f cats, magnaflow catback, port/polish t/b, egr deleted, ls6 intake, lid, 3.73's, hpt, performabuilt level 1 tranny, 3600 stall, Stage 2.5 (5.3 heads), Torquer 2 cam, 42# reworked injectors, TR6 plugs.
2007 Avalanche LTZ - Catback and Eibach springs
Honestly, I would set your camshaft revs back to stock and see if your startup airflow fixes it. I ended up having to add more than 2 g/sec so, smack it hard one time and see what happens.
2016 GMC Sierra 1500 6.2L
I tell ya... this damm thing. I fix one thing and something else gets jacked up. I had it to the 100 camshaft revs and 4 across the board for the start up airflow. It starts good when warm and cold (when I have the ECT enable at 285, stft enabled, and high rpm disable set to 0). When i put the ECT back to stock and the rpm disable to 4000 then it sucks and If I start it when cold and try to put it in gear it dies. If its warmed up it does not die shifing into gear or in to park.
99Z A4 w/ SS LT's, h/f cats, magnaflow catback, port/polish t/b, egr deleted, ls6 intake, lid, 3.73's, hpt, performabuilt level 1 tranny, 3600 stall, Stage 2.5 (5.3 heads), Torquer 2 cam, 42# reworked injectors, TR6 plugs.
2007 Avalanche LTZ - Catback and Eibach springs
4 across the board and 100 revs?? That seems like a lot of airflow and way to much delay. What is stock for your car?
2003 Chevy Silverado Daily Driver, 408 Iron Block,
LS3 Heads/Intake, 231/239 114, 4L80e, Yank SST 3200.
my open loop was commanding a 11.2 afr on cold startups @no less than 60 degrees!thats piggy on my setup!
way i could tell .maybe i did this wrong !please bash!lol.but before start with vcm controlls turn closed loop on.my vette started like never before on startups! damn neer perfect!
maybe thats just me!
tsp LQ9 408, wiesco -10cc, ls7s cam,tsp 5.3Lheads ,stock rockers with upgraded trunions,BBK intake manifold;ported polished intake runners,80MM Tb,haltech CAI,Longtubes,RPM full drivetrain,3:15 gears.
So any time the car gets cold you keep the laptop with you to do that?Thats just.. Well. Not right.
lmao! key word was commanding !!
tsp LQ9 408, wiesco -10cc, ls7s cam,tsp 5.3Lheads ,stock rockers with upgraded trunions,BBK intake manifold;ported polished intake runners,80MM Tb,haltech CAI,Longtubes,RPM full drivetrain,3:15 gears.
0.2646,0.2646,0.2646,0.2646,0.2646 , 0.1323, and 0.0000 from 176 up
camshaft was 0
The write up by rinkrat shows upping that by that much.
99Z A4 w/ SS LT's, h/f cats, magnaflow catback, port/polish t/b, egr deleted, ls6 intake, lid, 3.73's, hpt, performabuilt level 1 tranny, 3600 stall, Stage 2.5 (5.3 heads), Torquer 2 cam, 42# reworked injectors, TR6 plugs.
2007 Avalanche LTZ - Catback and Eibach springs
His units are obviously different than what your tune is using. You need to make sure the units are the same and go from there.
2003 Chevy Silverado Daily Driver, 408 Iron Block,
LS3 Heads/Intake, 231/239 114, 4L80e, Yank SST 3200.
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