So on Saturday I plan to finally fire up my newly built engine. My car is a 2001 Trans Am, originally A4. It has full bolt ons as well as 3.73 gears. It was originally tuned with ASA cam and 3800 stall.

Engine blew up and I wanted to wait to build it until I had a 6 speed.

Well now engine is built and the 6 speed is in. I have a build thread going if you want to check it out.

Engine:
243 Heads w/ yellow springs
Cam 226/230 .560/.545 112+2
7.4 hardened pushrods
ls2 timing chain
ls7 lifters
LS6 intake
3.902 Probe forged pistons
Melling 10295 oil pump
180deg thermostat
AC Delco 41-110 w/ MSD wires
Longtubes

Trans:
2001 fully rebuilt
GM slave
LS7 clutch & flywheel
GM pilot bearing
Pro 5.0 shifter
New oem master


My plan was to pluck a stock 2001 LS1 M6 tune from repository somewhere and slightly modify it for first start/break in. I have efi live v2.

I can't find the dang repository with the stock tunes in it, I probably am blind.

Someone suggested this modification to initial tune:

Add 2g/s to all idle airflow cells (base running airflow)
Set 0-400rpm idle timing to 26deg
Set 800-1200rpm idle timing to 22deg

Adjust closed loop commanded AFR to target 14.7:1 in all cells from 93deg coolant temp to 232degF

Set spark advance correction to 2deg in your first cell and 8 deg in the last cell. Highlight and smooth

Set spark retard correction at -2deg in the first cell and -8deg in last cell. Highlight and smooth.

Increase airflow adder for AC on by 10%

Set idle RPM to 950. (Does that seem high?)

(Note: That should give you a bise idle that runs without surging or dieing. With those mods you can probably work it down to 18-20deg of timing at an 850 rpm idle. If you see your fuel trims continuing to climb at idle you can force open loop at idle to keep it constant. It should run and drive really well with that setup, if it doesn't the tune is bad.


Thoughts? Concerns? Advice? I definitely don't want to hurt the engine on its first start up.

I am still not 100% sure on break in for these engines.

 

Tune file depot is gone I believe.

 

Yeah it seems that way. So am I stuck? I'm not sure if it is possible or easy to change A4 tune to M6. I always thought you just replaced the tune with M6 tune.

 

Just write entire an m6 file

 

Can that be done with efi live? I only ever see that it is either A4 or M6, never saw a way to change that.

 

Yeah you just need the m6 file in the os your using and then write entire. What os are you using?

 

12202088 I believe.

 

Pm lsxtuning and see if he will share a stock file with you

 

Stock 2001 and 2002 M6 Camaro tune attached. If it were me I would use the 2002 tune. The 12212156 OS is a better starting point IMO.

 

I will definitely take that advice! I really appreciate it!

 

It keeps kicking me out not letting flash to the 02 OS... Idk how to make it on efi live. Tried full pcm flash and nada. 8039179023 is my number I'm in a serious time crunch.

 

Ok I see to upgrade to newer OS I'll have to buy another bin license, not doing that as this time.

 

Got it to start! Yay! But now it won't start when warm!

 

It does not require another license to flash the 2002 OS in. Once you license the pcm you do not have to buy another license again.

 

It wouldn't let me do a full flash on it to change it. I just kept getting error messages about the OS not matching.

Right now though I am more worried about getting it to run and be driveable. Currently it will only start up and idle decent cold but when I try to start warm it will either not fire off or will fire up and stumble around 400 rpm until it builds itself back up to 950. It is killing me not being able to take it down the road.

 

put a completely stock file in it and see what happens

 

Tried that, wouldn't even idle well cold. At least now it will idle decent and is start able while somewhat cool just now when at normal temp but around 160 it will start and stumble around 400rpm then build itself up to 950.

 

are you tuning with a wb? if so what does it show on the warm starts? the stumbling and slow climb to the rpm target sounds like it's rich. a cammed car isn't as efficient at idle so you may have to take fuel out of the idle area. i'm just like you so please don't take my word as gospel

 

Unfortunately, I do not have a wideband but from my understanding I should or someone should be able to tune it pretty well all except maybe WOT without the wideband. I bought an O2 bung to add into exhaust for motivation but for right now the money tree is pretty much bare!

I like advice and it sounds like you are in the right direction for sure! Thank you I am still undecided what to do. On one hand I have the option for $250 mail order base tune or try and trailer it to a dyno... Idk what to do... I just want to be able to drive it.

 

you can tune all the pt throttle using the ltft's . If you have the software and the willingness to learn there are people on the efi live forum that will guide you through it. can you post your tune file?