datamaster spark knock problems

[bubba24]

Hi I have datamaster and for the longest time I hav been having this stumble when i mash the throttle it hesitates stumbles like it wants to die and shakes and does not rev smoothly. But when it is colder it is not as bad. So in datamaster is shows that when I mash the pedal ans it stumbles and shakes, the spark advance drops to zero, and spark retard goes as high as 15* in some cases. when cold it may only get as high as 9*. Is it just a faulty knock sensor or a false knock? Maybe the lt14 knock might fix this?

I do run 93 octane, have headers midlength, exhaust, no cat, intake

Thanks

here is my datamaster files, one is a open loop and the other is a closed loop.

[bubba24]

okay i foung the problem, it is the iat sensor, I moved it back to the intake boot, and left it plugged in but unplugged the map and the knock stays at zero, but with it in the retard is 1.3. So is it the map sensor causing the retard?? The iat relocate must have buggered things up, and when I put it back to the way it was I no longer get the 15 retard but now its only 1.3. So how do I find where it is seeing 1.3* retard?/



thanks for any help