*EDIT* sorry, car's a 2008 m6 corvette with the ls3, mods are intake, exhaust, headers, 230/234 cam, ect. Nitrous is on, but never turned on during this tuning
well today i was going to finish the car up and dial the nitrous in so I might be actually able to drive this piece before summers over. I ran the base tune with no spray to make sure fueling was right (havent driven the car in a bit)
It looked ok, its the scan #1
there were some lean and rich spikes, I did my normal histogram deal to tidy it up, and things just kept getting worse. Finally after 4-5 more tunes that kept getting leaner and leaner.... (even when making richer via airflow) I said fawk it, and put the original tune from the start of the day back in.... AND IT WAS WAY LEAN DOING THE SAME 3RD GEAR PULL... I am behind frustrated with this, I didnt want another full time job to tune this car but its turning into a nightmare.
Scan #2 is the scan of the same 3rd gear pass, about 2 hours later in the day with the same exact tune file.
I'll inlclude the tune.
Can anyone explain this to me? I mean 2 hours earlier in the same weather its a ok tune around my commanded afr, then after some other weird tunes going way lean, I put it back on and its lean too?
I then got mad and added 10% air to all values from 5500-8550hz and it did richen up (cars fuel system works fine) and i'll attach those logs. I did a run in 3rd and a run in 4th.
I noticed in 4th the car runs way richer then in 3rd? what gear should I be dialing in maf for?? If i dial in for 4th, 3rd will be lean?
I'm beyond confused, I started the day thinkig I would tune the spray, I ended up going backwards and ending up with a shit tune without the spray... almost to the point I'll pay to fly someone to calgary to get this shit done so I can enjoy this car again.
thanks for any help.