Timing going to zero on launch, M6 no traction control
Timing going to zero on launch, M6 no traction control Trying to understand why the timing went so low on the launch, around frames 2265. It went to zero. Traction was an issue so I was pedaling the car, but I still don't understand why the timing went as low as it did. Traction control on the car was turned off, ignore the burnout as I did forget to turn traction control off there. Tune and log attached.
On launch it starts to wheel hop so we had to pedal it and its seems like the frame after we're high tps% and then let out before getting back on the gas, it drops timing to nothing. Hence, the thought of DFCO or something else that would do that.Zero knock and burst knock table is set to pull zero degrees. Car is an M6. From what I gather, the car was pulling somewhere between 6-8 degrees. Initially I saw the timing was going to single digits and realized it was in the high g/cyl low rpm area of the main octane spark table. I fixed that and now it still seems to be dropping to zero if its peddled. If you floor it from a 1mph rolling start so it doesnt wheel hop, then we dont see the timing drop.
NOTE: BEFORE LOOKING AT THE TUNE FILE, CHANGE THE EXTENSION TO .CTZ SINCE LS1TECH DOESN'T ALLOW THE CTZ EXTENSION THAT THE NEW EFI LIVE TUNE FILES HAVE.
On launch it starts to wheel hop so we had to pedal it and its seems like the frame after we're high tps% and then let out before getting back on the gas, it drops timing to nothing. Hence, the thought of DFCO or something else that would do that.Zero knock and burst knock table is set to pull zero degrees. Car is an M6. From what I gather, the car was pulling somewhere between 6-8 degrees. Initially I saw the timing was going to single digits and realized it was in the high g/cyl low rpm area of the main octane spark table. I fixed that and now it still seems to be dropping to zero if its peddled. If you floor it from a 1mph rolling start so it doesnt wheel hop, then we dont see the timing drop.
NOTE: BEFORE LOOKING AT THE TUNE FILE, CHANGE THE EXTENSION TO .CTZ SINCE LS1TECH DOESN'T ALLOW THE CTZ EXTENSION THAT THE NEW EFI LIVE TUNE FILES HAVE.
With your scanner, you can log all sorts of timing functions.
I'd put them all in the log and see what is active.
Oops, EFI live. Maybe it will do the same.
Corvette? Is all the trans abuse and tq management removed?
I'd put them all in the log and see what is active.
Oops, EFI live. Maybe it will do the same.
Corvette? Is all the trans abuse and tq management removed?
Call me crazy, but I would prefer to know why the timing is dropping before just blindly making changes.
Thats the plan for next time, but was hoping someone can see the log and tune and tell me why. Its an Fbody, M6 so no trans abuse and torque management is zero'd out.
Thats the plan for next time, but was hoping someone can see the log and tune and tell me why. Its an Fbody, M6 so no trans abuse and torque management is zero'd out.
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I quickly looked at the log and the tune and the first thing I saw was why are you still running 1 bar stock OS and not COS#3 for boost? Its so much nicer to tune with the COS. Thats not causing the problem though. With the PIDS you logged I couldnt see anything pulling timing. It looked to me like it was just going to the min timing table when you were letting out of it and then going back to the high oct table as soon as you got back in it. The easiest way to test that is change the number in the min timing table to make another log and see if goes to that number. There isnt a transition table for going from 100% TPS to 0 back to 100.
Dont take this the wrong way but you have more of a suspension issue than a tuning issue IMO. If your letting out that much on a pass like the log shows then your ET isnt going to be close to what should anyways.
Dont take this the wrong way but you have more of a suspension issue than a tuning issue IMO. If your letting out that much on a pass like the log shows then your ET isnt going to be close to what should anyways.
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Verdad Gallardo I quickly looked at the log and the tune and the first thing I saw was why are you still running 1 bar stock OS and not COS#3 for boost? Its so much nicer to tune with the COS. Thats not causing the problem though. With the PIDS you logged I couldnt see anything pulling timing. It looked to me like it was just going to the min timing table when you were letting out of it and then going back to the high oct table as soon as you got back in it. The easiest way to test that is change the number in the min timing table to make another log and see if goes to that number. There isnt a transition table for going from 100% TPS to 0 back to 100.
Dont take this the wrong way but you have more of a suspension issue than a tuning issue IMO. If your letting out that much on a pass like the log shows then your ET isnt going to be close to what should anyways.
Dont take this the wrong way but you have more of a suspension issue than a tuning issue IMO. If your letting out that much on a pass like the log shows then your ET isnt going to be close to what should anyways.
Can't remember if I have seen this before on that model/year but I've seen it before on the newer blue/green (03-06) Gen3 PCMs. Have you disabled spark smoothing? Since I'm not looking at the log does it appear to have that 0 degrees of spark on a quick WOT shift transition?
Can't remember if I have seen this before on that model/year but I've seen it before on the newer blue/green (03-06) Gen3 PCMs. Have you disabled spark smoothing? Since I'm not looking at the log does it appear to have that 0 degrees of spark on a quick WOT shift transition?