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So, today I merged the 406 tune with part of an old 408 tune from a previously installed engine. Did not change much.
Still having stutter under 2000 rpm with between 12.5% and 15% throttle. No...

Anyone else got ideas?
I may get to drive it today.
Willtry to repost new tune and log later.

Checked tune's spark tables, high, low octane and Idle advance park and drive, all match.

Thank you. I will. Want to drive it but can't at the moment.

Keep the suggestions coming. As this has happened in a few iterations.

Yes, that is for the stock TB. I have a LS2 90mm

Just smoothed to edges by former co-worker. Same plate. Scalar is as other tune on different engine and seems close to stock 90mm would on Gen 3. .192?

Thanks for the replies.
Was in process of doing the VE tables. But the problem has happened with the other engine tuned before.
Will go over the tune more as weather here permits, raining like...

Hello all,
I have almost always read and received good advice and tips on this forum.
But have not had the need to ask many questions or the need for advice, until now.
Currently doing VE tuning...

Hello all,

Looking for a new cam for my LQ9 408. Has smaller 5.7 cam and has trouble breathing above 4000; Low duration and med lift.

In a 03 ZO6, Beefed 6spd. and diff with stock 3.42 ratio.
...

Originally Posted by outcastdon

Questions..
What size TB? 92mm
Check your ETC area scalar.
Have you run the RusK idle air scan? no not yet. trying to find time to digest all this info and...

Questions..
What size TB?
Have you run the RusK idle air scan?

Match your high octane spark table to the Idle spark advance in park and drive.

Try lowering your idle air decay in throttle...

Got a light flywheel now. Idles ok but rough.

Looked quickly at your spark tables....
Match your idle spark advance, in park and drive, with your high octane table.

Just a quick look...

Work on smoothing spark tables and copy high octane to low octane.
My original LS6 tables were a bit jagged also.
Then copy Correctly to idle drive and park spark tables.
...

Long tubes play hell at idle, depending on a few things....overlap, location of O2's, correct fueling and timing at idle.

I ended up forcing PE at idle and have no problems, OL or CL,

Scope out my older 03 vette LS6 tune.

Bolt ons and small cam also.

Stock OLFA is the one to use.

Just sending a test reply as I'm have trouble posting.

I have a different operating system.

But still need more details...

Engine? Trans? Log?

Hello.

I have nowhere near the HP as you but was having similar problems and a couple more codes. P1515/1514 and one other

Here's how I dealt with them...

Eng Diag>TPS Sensor>Calc...

IVO is 26.5 ° BTDC ( - indicates ATDC)
IVC is 64.5 ° ABDC
EVO is 75.0 ° ATDC ( - indicates BTDC)
EVC is 25.0 ° BBDC
Overlap is...

Interested also.

Stock values;
15.27, 15.59, 15.91, 16.22, 16.53, 16.83, 17.12, 17.41 17.70, 17.98, 18.25, 18.52, 18.79, 19.06, 19.32, 19.57, 19.82, 20.08, 20.33

All the stock square rooted...

Rewashed VE, MAF and idle data after lowering boundary to 6.55 and normal to 6.50.

Idle is different, taking off "loads"? it down but I contribute that mostly to the lightweight flywheel.
Runs...

"Injector timing is a tradeoff on the Gen3 PCM. I did extensive dyno testing on my personal car on a loaded dyno and when I got idle and drivability the most stable it lost powerband up top and...

Thank you for responding WS6.
Sometimes hard to get one quickly or at all, though I don't post much, I read alot.

I believe everything else is set close.....timing, fueling, ect.
Car starts...

O2's for now. Would rather have the WB.
Got to get a sensor for one of the WB's within the next couple of weeks.
Have an indash Autometer and an AFX.
Holidays took a toll on finances. LOL

Have...

Thanks WS6.

Backed off the injector timing a bit.
Redid VE, MAF and idle X2 earlier today.
This is first scan after enabling everything. (should have date of 29th)
Has more stutter? at 10%...

Thanks for the reply.

Will try lowering it some, but I have had less issues at this point,
low rpm stuble, idle surge....