Advice:427 supercharged LS9 injector/LS7 MAF

[exploder]

Holy crapola....you will never believe this. I looked at the log again and the commanded AF was 11.6 and map was at 13.9.....I went and checked the map and found it had come unplugged I guess when I swapped the injectors. I had to go back and play with the VE alot but I got it running correctly now. I will make some logs tonight and report back.

[joecar]

I just went back and looked at the log and it shows that my commanded AFR is 11.3....how did that happen? Where in my tune would it make it do that?

Your log in post #28 shows that MAP is pegged at 96kPa... looks like MAP sensor is open to baro.

Your tune file in post #16, B3647 has 95-100kPa cells set to EQR 1.244-1.299 (AFR 11.3-11.8)... MAP is pegged at 96kPa, so this is the AFR you see.

I see by DTC P0102 you're in SD... so do this:
- fix MAP sensor,
- re-do VE table.

[joecar]

I also see B3616 set to 0% from 0-1200 rpm, set this back up to 64%.

Set B3618 from 0-2400 rpm to the same EQR as the rest of that table.

[exploder]

I did a good bit of driving today and got it semi close to where it needs to be. Tommorow when the roads are dry I'm going to slowly start rolling into boost and I hope all goes well. If anyone has any suggestions for any extra transient filters for my logs would be appreciated. Here is a log and a tune for where I am at as of now. I went in and hand smoothed.

[joecar]

That looks much better, good job...

Note that B5917 is set to 256, which means that the base spark table is used when actual throttle position goes under B5916
(I see minimum TP is 11-12%... if this has ETC then need to log the other throttle position pid).

Also, every so often, at steady throttle/airmass, there is a sharp down-spike in spark timing... I'm not able to see what's pulling it.

[joecar]

Don't forget to make the 105kPa columns in B0101 and A0009 the same.

Try injector tables B4003, B4005, B3701 from the LS9->LS1 spreadsheets
(in each spreadsheet, the second table pastes-with-labels into the LS1 table).

[exploder]

I had already gone back and made the 105kpa colums the same. I am also going back to change the injector tables. The car is a ETC vehicle, but what other TP pid are you talking about? Do you mean I need to not use the pid that is selected or I need to have another TP pid in addition to the one I'm using. Also B5917 is set that way from the factory I guess on most corvettes because I went back and checked several other tunes I had and they are all the same. What do you suggest changing b5917 to. I think the sharp down spike in timing may be the boost timing table kicking in as I had it set to pull 10 degrees. Keep the advice coming.

[joecar]

Those injector "characteristics" tables may help with pulsewidth at idle and during throttle transitions.

I think the pid is GM.APP.

B5917 might be ok, because both B5917 and B5916 have to be met for the PCM to revert to the base timing table, and B5916 is set low.

Ah, I see, boost timing table, ok, I'll take a closer look (a bit later tonite).

[exploder]

I did some more logging tonight and everything is going fairly well. I finally rolled into boost and found out my fuel pressure is dropping. I have it set up with a secondary fuel pump to kick in under boost. I'm going to test my boost pressure switch tommorow to see if it is functioning. I also had the dreaded 1514 code and went into reduced engine power under boost. I went back and decreased the VE, IFR and Boost VE by 30% and that seemed to fix that problem. I do have 3 issues I need to resolve.

1. At highway speed while cruising in 6th gear if I need to slow down every once in a while as I take it out of gear and go to neutral while rolling it just dies. I can crank it back up no problem though. What do I need to tweak here?

2. When I am in 6th gear and logging in the scanner at steady speed and I hit the 1600rpm and 80kpa and over cells it starts commanding an AF of around 12.5ish and it runs like crap there and it obviously needs to be around 14.6 or so at that low of TP%. I have to go back after each log and remove fuel manually in these areas to keep it where it needs to be so that it runs correctly. How do I exclude or lessen the effects of this because B3647 is commanding it to be there?

3. I have a small stumble as I take off from a stop. I looked at the log and it was pulling alot of timing with no knock right as I would let out of the clutch and get rolling. I added some timing in the areas and it drove better, but now it has a bucking to it as I get moving at low speeds. I can give it more gas and it will pull through it or I can push in the clutch and it will stop.