HELP NEEDED - TOTAL NEWB - Hot Cam Ls3 & 6 speed manual stalling and surging.

[dcdman67]

Hi all. Been lurking on the forum for a while and trying to learn in my spare time, but with 3 kids and a full time job, I don't have much.

I am a total newbie when it comes to computer controlled vehicles and understanding ratios needed for the vehicle to function properly. My car stalls when coming to a stop (decelerating then pushing in the clutch). It also surges at low speed which the paperwork says is common with the hot cam.

I have a 2011 LS3 eRod crate engine a hot cam that I bought from Pace Performance years ago. The cam specs out with .525-inch intake and exhaust valve lift. Duration (@ .050 inches) is 219 intake and 228 exhaust. After reading through posts, I edited my stock tune to set my transmission gear ratios, the VSS pulses per rev (to get my speedometer to read correctly) and added 1 to the entire Airflow Minimum Table to try and remedy the stalling issues.

I really have no clue what I am doing, so here asking for help. Can someone look at my tune and log file and make some suggestions as to what I can change? Also, there is a lot of information here and I am having some challenges narrowing down what I should be studying. Any pointers would be greatly appreciated.

Thanks in advance!!

[GHuggins]

Add 3 or 4 to your min air table then dial your VE in and go from there. You might also want to bump your idle timing up about 8 degrees too so it's around 22.

[Guy With A Chevy]

Being new my basic understanding is the 3rd gen only uses the VE SD model. The 4th gen not much different uses the VVE SD and the MAF but can use mostly either but never just 1(think a read of a 4th gen rarity to use only SD?) that being said if either set of variables are wrong it will affect how the latter makes trims.

SD is built mostly by RPM and the MAPP to calculate cylinder airmass/airflow and the appropriate fueling. The MAF is easier to tune and many start before the VE/VVE SD tuning. Open loop means the "circuit" is open and not connected. Closed loop the sensor reads and applies trims. Dont do MAF open loop.

Start with idle tuning and understanding the fueling on the main VVE table it should be smooth not jagged. Fueling is also controlled in many of the other tables and you will have to learn what to change accordingly but do not change your injector data(milliseconds pulse width) unless swapping injectors.

Mainly I would search as much on idle tuning which will make more sense of the rest of the tuning.

Getting the Scanner to work accordingly is a different realm of understanding. Logging the proper channels I believe is key all the settings in the graphs/histos/charts can be applied after but I may be wrong it may be necessary to setup the charts before it feeds it to graphs. If your someone who has an understanding of the scanner jump to this

https://www.youtube.com/watch?v=xRZaTblSQ_0

And more for all the extra time you will have when you tell her "Babe... I love you BUT I'm going to learn tuning."

https://forum.hptuners.com/showthrea...2-Acronym-List

https://www.youtube.com/watch?v=0N15CBCmWvE

https://www.youtube.com/watch?v=r00uXQomvRI&t=1s

https://www.youtube.com/watch?v=HMxrQOw96B8

https://www.youtube.com/watch?v=K_h4SIPhtdQ

https://www.youtube.com/watch?v=xRZaTblSQ_0

https://www.youtube.com/watch?v=YRHZV6yTDzQ

I need to go respond to my thread and work on my tune LOL

https://forum.hptuners.com/showthrea...803#post747803

Holley I heard is the easy way out if you want your family time respectably.

[Smxtmpr34]

The Hot Cam is pretty mild as far as Cams go for this engine, the stalling and surging issue is all in the tune under Airflow.

I switched to a Haltech last winter and got a new Laptop with it so i Don't remember what my settings were, But this cam runs pretty smooth, don't let anyone fool you saying its the Cams Fault why the engine runs the way it does.

My LS3/480 Ran great when I was using HPT on it, And runs Flawlessly with the Haltech, it doesn't even think about stalling when pushing in the Clutch from any speed.