i converted to speed density about a week ago and car has been great till this morning. here is what i noticed. temp this morning in nyc was like 12 degrees. car was warm driving along the revs did not seem to drop as they should in between gear changes. then as i was cruising along in 5th gear about 60 mph when i went full throttle at about 5-7 lbs of boost i got the flashing cel indicating knock and my afr's were in the 16-15 range lean my fuel pressure was about 42 psi . later in the day took car for a drive and everything was fine no cel and 27 lbs of boost. my question for my sd people is what would be symptoms of a bad air temp sensor and could this be a result of the cold temps here. when car was tuned it was about 35 degrees here.

 

bump for any suggestions

 

your fuel pressure went up to 42psi or stayed at 42psi when you hit boost?

 

Log the car, you'll be able to tell if the IAT sensor is working properly. Also, find consistencies. Does this happen all the time under similar conditions, or was it a weird fluke?

 

seems to be a fluke so far has not happened again. my fuel pressure was increasing with boost when the light would start flashing i would notice the fuel pressure gauge going up to about 42 psi before i would back off the throttle 130 miles so far and has not happened again. all is ok. just being careful now.