tune for 2011 Chevy Silverado

[Rwhite85]

my stock l20 4.8 let me down at 240k and not mad about it. pulled the 4.8 and install 5.3l with sloppy stage 2 cam and 243 heads with bigger valve springs
truck has a 38 ecm and have been trying to tune myself with not so good luck truck runs and drive with stock tune i dont understand the ecm and just want it to run better

does anyone have a tune file for a fly by wire 5.3 with sloppy stage 2 cam or could help me with mine

i feel like getting rid of the vvt has my spark table way out of the ball park

please help

[nonnieselman]

Posting your tune helps

[Rwhite85]

so i have been messing with it and it runs alot better in open loop. after that when i think i am doing good i load the tune and it sucks. at this point i wish i had put an older ecm in the truck. but this is what i got and i will figure it out. i also am a dad of three kids under 12 so hard to find time to figure EFI out. this is the tune and a log of a drive to work

[nonnieselman]

Do you have a wideband?

GIve this a try and see how it does. Dont do any WOT pulls until you get a wideband tho.

You cant put a older ECM in the truck tho. Your stuck with the E38 unless you go with a Holley EFI setup.

[Rwhite85]

just looked threw it. first i want to say thanks for taking the time for me. are my spark tables that far off. i am going to get a wideband. what would you recommend for the wideband. i have played with the tune more around idle because i reall want the big cam sound that i cant seem to get. today i am trying to get the truck to hold back when off the gas and i pull it down a gear. i really dont have a clue what i am doing if you cant tell. i am going to load the tune and give it a shot thank you again this is my latest tune

[In-Tech]

Hiya,
While this is a tuning forum, most of us are professional tuners and don't share tuning information. EfiLive has provided an excellent TOOL to aid in the tuning process.

Post your stock file and I will help you with a starter tune so you can fine tune from there.
-Carl

[nonnieselman]

just looked threw it. first i want to say thanks for taking the time for me. are my spark tables that far off. i am going to get a wideband. what would you recommend for the wideband. i have played with the tune more around idle because i reall want the big cam sound that i cant seem to get. today i am trying to get the truck to hold back when off the gas and i pull it down a gear. i really dont have a clue what i am doing if you cant tell. i am going to load the tune and give it a shot thank you again this is my latest tune

Completely forget about the ghost cam tuning. Get the thing to run right first then do that mess later.
Right now your upsetting the idle with ghost cam but your also trying to get the idle right "when off the gas and i pull it down a gear"

Ive used Innovative LC2 wideband for years with serial comms to the EFI Live V2.

[Rwhite85]

Completely forget about the ghost cam tuning. Get the thing to run right first then do that mess later.
Right now your upsetting the idle with ghost cam but your also trying to get the idle right "when off the gas and i pull it down a gear"

Ive used Innovative LC2 wideband for years with serial comms to the EFI Live V2.

pulling down a gear meaning down shift my auto trans i am sorry should have just said that. i am a country guy and i am learning the computer and how to use these forums at the same time. i have been reading threw every thing i can find on tuning. i am sure of a few thing in the past few months of trying to figure this out. a e38 pcm is prolly not a good choice for my first tune, i have a lot of respect for you guys that can tune and figure this stuff out, the more i read the more confused i get. saying that i have learned alot and i have made the truck run a lot better then it did on my stock tune. i know there are mixed feelings on the crackle/pop when off the fuel pedal. but i like it and i think i got that part [maybe]
"ghost cam" i think i know what ur saying. i am around trucks and cars that have cammed ls engine and sound amazing and mine just sounds like its just running like shit. i do have stock exhaust besides a muffler.
as far as running, i drive the truck daily. it does not run bad with what i have done. its smooth and feels like its just a stock truck. i know it should have more power. i have a ss3600ls stall to put in just have not had the time.
i am going to get the wideband thank you for that.

short story. i am a technician just never went past loading a tune that was sent to me. i had set up for a shop to tune my truck before i built it. called when i got it running they then told me they would not touch it because they did not build it. i put a 5,3 out of a 1999 truck into a 2011 truck so i had to change the trigger wheel on the crank and put an ls2 timing cover. so now i am here and would be happy to pay someone to tune it.

everyone around where i live has hp tuners, i so badly want to figure this all out on mine own but i don't think i am smart enough. i am a visual learner

thanks to you guys for helping

like i said i am figure this out i think this is the stock tune

[In-Tech]

Hiya,
Don't beat yourself up, I've been doing EFI since the early 90's and still learn. As far as aftermarket goes, I like EfiLive the best. I have most all(HPT, EfiLive, TunerCat and the real GM cumbersome software) Give me a bit and I will post a good starting file for you.

[Rwhite85]

well this is my first tune.all i ever done was load what was sent to me. i feel like i have done some things right. i am really confused on the spark tables on how to dial them in. i have it at 18 on idle and the tune i was sent has 30 where i have 18 so i am confused as to y its 30. i am worried about dialing in the fuel if i cant get the spark right. then the idle, it has a good size cam or so i thought and just sounds like its misfiring most the time every now and again it will chop. i have only been at this for a few months. there is so much more to this then i ever thought and my hat is off to u and the ones that do this every day. i feel like if i worked with someone that could show me and explain i would pick this up a lot faster. but i cant find anyone around me that bulids custom tunes with EFI. so here i am. any way thanks again.

[nonnieselman]

You say you had 18 for idle. Which table?


The ECM uses B5104 WHen your off the throttle. (Defines the base timing values when the throttle is closed (idle mode).)

The ECM uses B5122 When your off the throttle and the truck is slowing down.
(Base timing used when the throttle is closed and the vehicle is decelerating but the fuel has not been cutoff (DFCO).
It can actually be used to assist in controlling the deceleration rate of the vehicle.
The final spark value from this table will then have the greater value from B5116 Cold Engine Noise Reduction Table "Cold Engine Noise Reduction Table" or the Catalytic Converter lightoff spark retard tables.)

Once your on the throttle it uses B5101 unless the knock sensors are seeing knock. then it reverts to B5102 and slowly adds timing back till it reaches the B5101 timing.

I do agree that HP Tuners has taken over and it seems everyone uses their stuff now. Ive bought a few of them off guys that bought them to tune their truck and was quick to figure out it wasnt for them and needed some money.
I struggle to do tuning without being in the vehicle and listening and feeling how it reacts. I just know what has worked in other trucks and use that info to help others. Its been a long 20 years playing with this tuning stuff.
Now days i will install a Holley ECU in trucks and cars just for the ease of use and i can make changes with the customer driving the vehicle around with their laptop hotspot to their phone. Makes it much easier.

[In-Tech]

I apologize for not posting a file yet. I will in the next day or two, some family stuff going on. Then there is work too :thankyou2:

[Rwhite85]

You say you had 18 for idle. Which table?


The ECM uses B5104 WHen your off the throttle. (Defines the base timing values when the throttle is closed (idle mode).)

The ECM uses B5122 When your off the throttle and the truck is slowing down.
(Base timing used when the throttle is closed and the vehicle is decelerating but the fuel has not been cutoff (DFCO).
It can actually be used to assist in controlling the deceleration rate of the vehicle.
The final spark value from this table will then have the greater value from B5116 Cold Engine Noise Reduction Table "Cold Engine Noise Reduction Table" or the Catalytic Converter lightoff spark retard tables.)

Once your on the throttle it uses B5101 unless the knock sensors are seeing knock. then it reverts to B5102 and slowly adds timing back till it reaches the B5101 timing.

I do agree that HP Tuners has taken over and it seems everyone uses their stuff now. Ive bought a few of them off guys that bought them to tune their truck and was quick to figure out it wasnt for them and needed some money.
I struggle to do tuning without being in the vehicle and listening and feeling how it reacts. I just know what has worked in other trucks and use that info to help others. Its been a long 20 years playing with this tuning stuff.
Now days i will install a Holley ECU in trucks and cars just for the ease of use and i can make changes with the customer driving the vehicle around with their laptop hotspot to their phone. Makes it much easier.

i have been around performance upgrades all my life , wait....it is my life. but i never got in the brain before.. are locale guy is the one that said he would tune it then said no because i did the wrenching. that is how he started out was riding shot gun. i cant even guess how long this will take me to under stand but i know i can and would have tried to know a little before i built the truck.. my biggest worry is i took out a low compression (8.9) vvt 4.8L installed a 5.3L with a cam. there may not be a lot of difference in the two but i feel like there is. the 4.8 could get 60(+-) degree of timing with the VVT. 5.3L can get undder half of that so i would think it would change the tune like crazy.

18 in all them base cost low and high prolly a dumb idea but it got it to run. i really think my stock exhaust is why i cant really here it lope. altho sometimes it humps really hard and sounds like to 15 subs pounding and i have no codes when i drive. (most times)

might be cutting the cats out this weekend i am going to mess them up if i havent already.

[Rwhite85]

I apologize for not posting a file yet. I will in the next day or two, some family stuff going on. Then there is work too :thankyou2:

i don't like most people because they will be mad at something you are doing for them for free and that absolutely blows my mind ITS FREE so at work someone will stop and need a tire. we dont sell used tires that way they cant sue us if it blows out. are fix for that is no paper trail. it sounds dumb but we live in a small town and people dont have money to buy new tires at the drop of a hat so we will give u a used tire put on if u plan to buy a new tire threw us. most come back in a week or two to buy a tire some don't and will be mad if something goes wrong with a used tire after 6 months of driving on it.

take all the time you need and i appreciate you for taking the time to do this for someone u dont know:bangin:

[Rwhite85]

nonnieselman not sure how to get rid of the other post:wallbash:

[nonnieselman]

Post which tune you have in the truck when the 3 data logs were taken

[nonnieselman]

i have been around performance upgrades all my life , wait....it is my life. but i never got in the brain before.. are locale guy is the one that said he would tune it then said no because i did the wrenching. that is how he started out was riding shot gun. i cant even guess how long this will take me to under stand but i know i can and would have tried to know a little before i built the truck.. my biggest worry is i took out a low compression (8.9) vvt 4.8L installed a 5.3L with a cam. there may not be a lot of difference in the two but i feel like there is. the 4.8 could get 60(+-) degree of timing with the VVT. 5.3L can get undder half of that so i would think it would change the tune like crazy.

18 in all them base cost low and high prolly a dumb idea but it got it to run. i really think my stock exhaust is why i cant really here it lope. altho sometimes it humps really hard and sounds like to 15 subs pounding and i have no codes when i drive. (most times)

might be cutting the cats out this weekend i am going to mess them up if i havent already.

Your not going to be running 60* timing under any load. On decel it might have gone in the 50s tho.

I noticed your B0104 is still setup for a 4.8L... Change that to .662L for the 5.3 cylinder volume.

Removing cats might help some.

Where did you buy this camshaft?

[Rwhite85]

Your not going to be running 60* timing under any load. On decel it might have gone in the 50s tho.

I noticed your B0104 is still setup for a 4.8L... Change that to .662L for the 5.3 cylinder volume.

Removing cats might help some.

Where did you buy this camshaft?



got the cam from a buddy not sure where he got it.. i trust the guy he said it was a sloppy stage 2. the last three logs are the tune that is in the truck i am running my maf coming in at 1200 rpm it runs the best runng from the maf tables i think i said that right. here is the tune

[nonnieselman]

That looks like one of the sketchy Ebay pictures.

[Rwhite85]

thats all he had to give me for the cam specs cam been in the truck for a few months now no issues so far :unsure:

[nonnieselman]

Hopefully its a decent one.

[Rwhite85]

messed with spark at idle closed and have it around 16 and sounds good most the time i cant wait to get my wide band and play with fueling at idle it smells really rich and add to that its getting cold have not messed with it really about to start again also took out the cats. changed the oil and all looks good getting it tested

[nonnieselman]

Your narrow bands will tell you if its rich or lean.
Are your fuel trims reading crazy?

[Rwhite85]

not really looked but i will check it out can you explain what i need to watch sorry its been so long hope u guys are still around

[nonnieselman]

Just datalog Long Term Fuel Trims and Short Term Fuel trims.
Get it up to temp and just watch the trims. If they are constantly in the negatives more than 5% then it needs less fuel. If its in the Positives more than 5% then it needs fuel removed.
Think of your factory oxygen sensors to be more accurate at part throttle than Wideband. And Wideband only when in PE.