Ok here is a log of my car. Can anyone make any suggestions for what i should do.....

 

i don't know if it is just me, but i can't open the file.

 

i just had to do a saveas then open the file with either csview or excel

 

basically the issue is the car is knocking up top but only 1's thru the main range of power. It seems that up top it advances the timing a bit and begins to knock more i am assuming i can just back the timing down a bit and it should go away.. figured i would ask first.. Also this is a mail in flash un modified

 

You might want to add some more fuel and get the AFRs at 6k closer to 11.2 or so. You are running 11.4:1 at 7k and thats a little lean. Get it closer to 11:1 around 7k and if that doesn't rid you of knock you can pull a little timing.

 

thanks for the comment! changing it a bit now

 

It seems a little aggressive for a mail in flash ... did you increase the boost after the flash? That could be causing the lean AFRs.

 

no it was the same before and after the mail in flash..... Intially the flash was sent to me without any wideband logs as i didnt have one at the time. Hopefully all is well though

 

Richen it up where it knocks, or back the timing off and leave the AFrs are.

I personally would leave the AFRs and just back the timing off until your around 3 counts.

 

(newbie question)...What do you use the oxygen sensor reading for? Is it mainly a diagnostic tool to see if something is wrong with the hardware? The run above is the first time I've seen it dip below .8v in any of my dozens of runs and my friends' runs. What does it mean when the oxygen sensor reading dips down like yours?

 

1st thing to do is get the car fully warmed up and do a pull, 175 min and post that log.

 

I would add 1 fuel at 6500 and do another log

 

how about sending the log to whoever you bught a flash from and have them do what you paid for.

 

^^ because not every tuner offers a "free" service where they will make changes to the map after the first one.

To the OP if you do a few more runs is this fully repeatable? You only have one run in that log file. Either way as others say it looks a bit lean up top...what octane fuel are you using? Also what mods? From the load its hitting I am guessing its pretty stock?

 

Contact Mellon, click the link in his signature, he will fix it, give you a nice "Cyber tune" and problem fixed!