using 14.047 for desired AFR and not 14.63?

[picnic_george]

42lb injectors. I've changed the spark tables a few times. I was running a stock ls6 table but decided I needed more so I used the 98 table and went to 28°. The ve table is smoother now. I went off and retuned the car and it didn't help anything. The stupid thing was telling me it was super close throughout the range in olsd. Whatever I guess :shrug: still doesn't tell me why my fuel trims are out of whack at idle. Probably some setting I missed. I don't remember what the maf looked like I'm check it again, I didn't get that far yet. I don't drive the car often. It's got 1600 miles on it in the last 2 years 1200-1300 of it was breaking in motor, transmission, clutch, and rear end lol.
I'll get back to it later and get it more dialed in. Ls6 intake..

[mr.prick]

2 Questions:

1. Are you using {AFR}/{GM.AFR} as BEN factor? (analog or serial)

2. What are the injector offset settings?

[Chalky]

I guess I am confused. Your tune you attached has a rough ve table but you said it is smoother now.

As far as your idle issue, I explained what was happening. With a big cam, you run some overlap, the 02's see the unburnt oxygen and assume car is lean and the 02s then add fuel.

Just curious but are injectors 42# @ 3 bar or 4 bar?

[picnic_george]

2 Questions:

1. Are you using {AFR}/{GM.AFR} as BEN factor? (analog or serial)

2. What are the injector offset settings?

1. I'm pretty sure thats what it is. 2. IDK I did that 2 years ago

I guess I am confused. Your tune you attached has a rough ve table but you said it is smoother now.

As far as your idle issue, I explained what was happening. With a big cam, you run some overlap, the 02's see the unburnt oxygen and assume car is lean and the 02s then add fuel.

Just curious but are injectors 42# @ 3 bar or 4 bar?

I've spent the last 2 days dicking with my tune. Smoothing a tune is one of the easier things I've done. They are standard bosch 42lb injectors. Those are rated 43.5 psi.

That cam is tiny, I just always read about negative fuel trims with more cam and maybe no one is referring to ide. I guess I should stop worrying about it :shrug:

I think the reason my VE table was so close is for some reason my car has to be correcting fueling. I noticed there are STFT while in OLSD. Why would that happen, LTFT is disabled and o2 are not supposed to go to closed loop before 252 degrees, but i remember reading here sometime ago that they may still be doing something.

[mr.prick]

It looks like {B4001} was increased but all the other tables in the injectors folder are stock.
This maybe the issue

If you change {B3601} and use AFR for BEN there can be another problem too.

[Chalky]

From the looks of it, you are using IFR values for 3 bar 42# injectors. With GM being 58#, 4 bar, you need to bump up your IFR tables.

As far as STFT/LTFT, if you are in OL, trims are not being influenced by 02's. Could your MAF still be functioning and not in SD? MAF or 02's functioning pretty much make ve tuning a waste of time.

Personally, I liked my cam 224/228-114 with xer lobes. I would have gone to 228/232 with afr 205 heads I had but I worried about PTV clearance. I just thought that size cam was about perfect for a street motor of this size. JMO

[slows10]

Must be in semi open loop if stft are changing O2 voltage?

[picnic_george]

It looks like {B4001} was increased but all the other tables in the injectors folder are stock.
This maybe the issue

WHat else would I be changing? I just used the injector spread sheet and the car started right up.

If you change {B3601} and use AFR for BEN there can be another problem too.

I just recently changed that seeing what would happen. I don't think I'll be leaving it there.

From the looks of it, you are using IFR values for 3 bar 42# injectors. With GM being 58#, 4 bar, you need to bump up your IFR tables.

I'll recheck that but I'm positive I did it right.

As far as STFT/LTFT, if you are in OL, trims are not being influenced by 02's. Could your MAF still be functioning and not in SD? MAF or 02's functioning pretty much make ve tuning a waste of time.

The MAF is unplugged when I do it. I'm presuming the o2s are messing up the program.

Personally, I liked my cam 224/228-114 with xer lobes. I would have gone to 228/232 with afr 205 heads I had but I worried about PTV clearance. I just thought that size cam was about perfect for a street motor of this size. JMO

It seems to work well. I would have went bigger but my car weighs 3800lbs and has a whopping 347 cubic inches so I stayed there.

Must be in semi open loop if stft are changing O2 voltage?

That's my assumption. I don't know any better. There has to be a reason, I made some tweaks to the ve table and every cell I hit was within 1% and I know my original tune was not even close to that good. And even if it was, it would be off by more than that. Loggin o2 voltage won't tell me anything though, unplugging them is too much of a PITA.

[slows10]

To run total open loop I think B4206 has to be disabled. If it is enabled then o2 feedback will be used with the open loop table B3605. Also B3801 has to be disabled. B4205 set to max temp. Are you trying to just run open loop with no trims?

[picnic_george]

I'll check that, I hope that's the problem. Yes I want no fuel correction at all. It's been a while and my brain is toasted lol Thanks