[Power Hungry]

Originally Posted by tadams11201

Timing is retarding into the negatives even with power programmer (like -3 and -4) and this is when I notice the miss. Last thoughts are maybe corrupt files and wanting to try downloading the custom tunes that I paid for again. Suggestions?

Tim,

When you get a moment, can you grab some data for me? I need the following:

Load
Spark
MAF V
RPM

This will be extremely helpful in diagnosing what's going on with the spark. Under heavy acceleration, negative numbers are not unusual at all. However, if you're seeing less that 10-16 degrees under moderate load then something is amiss (no pun intended).

If you could go to the datalogging menu, set up the datalog to read those values, and then run a datalog session it will store up to about 6 minutes of data on the programmer. You can then use Pegasus to pull the data off the unit and send me the file for examination.

I'm curious if you may have a faulty knock sensor or if maybe the knock sensor is picking up some random noise and interpreting it as knock and yanking out timing.

Let me know if you have any questions on this.

Thanks.