2002 Corvette COS3 Timing jitters

[240sxpooter]

Hello,
I am new to EFIlive (used to be a HP tuners guy) and I am having a issue on a car I'm tuning. I've attached a screen shot, log,dyno chart, and tune.

Basically I am getting a jittery timing curve in my logs and I'm unsure why. The car is getting close to being completed and this is one of the last concerns I have.

TMS 408
Prochaged DSC-1 (making 10-11psi)
E75
127LB injectors
Descaled VE and injectors to fix P1514 <-- Load was going to high

I feel like the logs my be incorrect but I'm not sure. Any help would be much appreciated.



COS3- SENID FINAL FOR 4-5-15- 11afr timing at 10 degrees----BACKUP.ctzLog_00011-run 11 760hp.efi

[240sxpooter]

Image of concern

[joecar]

I'm looking at your files...

so you're running MAF-less with LTFT...?

( BTW: your B3647 is incorrect (it still has the B3605 data), when you applied the COS you neglected to edit B3647 )

[240sxpooter]

Currently I have LTFT on. There where many issues getting the car running and the LTFT helped with the fueling issue.
Also I just fixed the B3647 table (explains the super rich OL fueling)

[240sxpooter]

Is it possible that the A0010 map is coming into play 14psi early? Like the Map axis scaling is off +14psi?

[joecar]

A0010 kicks in when operating point leaves B0101 and enters A0009... your A0010 has a smooth line so it is not responsible for the jittery timing.

Look at the pids that have names starting with "EST_" (ending with "_DMA"), log these to see if they will give us a clue.

[240sxpooter]

A0010 kicks in when operating point leaves B0101 and enters A0009... your A0010 has a smooth line so it is not responsible for the jittery timing.

Look at the pids that have names starting with "EST_" (ending with "_DMA"), log these to see if they will give us a clue.

It was a silly oversight. Burst knock retard was all over the place

After this timing was spot on and 14* ended up making 790whp and 760wtq.


Thanks for the help.

[joecar]

B6212 only, or B6210 also...?

Good job... post a log of that run if you have it.

[240sxpooter]

B6212 only, or B6210 also...?

Good job... post a log of that run if you have it.

B6212 only- I zero'd it out

[240sxpooter]

EFI LIVE FINAL RUN 790hp760tq.efi