Reduced Power Mode but No DTC

[CTP Racing]

I am working on a 2001 Corvette. I tried to increse fuel by 3% and left everything else the same from the stock tune. I flashed the PCM and went to go for a run and it went into reduced power mode. There is no check engine light or anything like that. I went into the table C6101 which is the expected airflow table and incresed all the values by 10%. Same thing. Went back in a did another 10% with still the same results. I have the tune file and the log file if anyone wants me to post it up. Just for info this car has a Weiand Intake manifold, K&N intake kit, exhaust etc... They are changes that would mean an increase in airflow but nothing major like heads or cams, etc... Any help would be greatly appreciated

[Dirk Diggler]

20% is not enough try values like 50% or bigger and it will stop when you are finished you can create a histogram log the values and plug them back in + 20% and you are done

[CTP Racing]

I don't think that table is the problem only becuase right there in the description it says that if the values get exceeded then the check engine light will come on. I don't think I have exceeded those numbers raising the values 20% and also because there was never a check engine light when the car goes into reduced power mode. I did notice that it does text it across the bottom of the dashboard "reduced power mode". Any other ideas??? I am going to try raising it 50% in a bit so i'll let you know on that but I think it's doubtful.

[Dirk Diggler]

Are you seeing P1514 when you scan the dtc's and is this the first time the car has been tuned?

[CTP Racing]

P1514 has never surfaced at all. This vehicle came to us with a predator tune in it. I read PCM data and saved that file. Then I put the stock tune back into it and read that and saved with efi live also. So starting with the stock tune I added 3% more to upper rpm and load ranges of the VE table where I was seeing a little bit of knock retard. I reflashed pcm and it ran like crap. I reflashed stock tune and it ran fine. I reflashed with 2% more fuel and same thing. Then I upped the C6101 table 10%, same result. Then 10% more and same result. I just don;t think thats it because it states prety clearly that if it exceeds the values in the table it will pop up the code and I have never had a code. There is also not any huge differences in airflow like a cam I wouldn't think.