I Just bought a PFC an I need some expert help. I whent to the local dyno and ran the car to confirm my AFR's with the base map. I made 4 Pulls the revs would stop climbing at about 6100rpms in 4th. Could this be over boosting and hitting the PFC fuel cut? The HP curve is very rough not smooth. My mods are DP, MP,CB ,intake. I did not notice the fuel cut before going to the dyno. Has any one had this problem.?

 

Compare the boost that you were running to what the manual says about FUEL CUT in the section covering boost control.

 

check speed sensor or to much boost for map sensor ?

 

Sounds like ignition breakup to me. Fuel cut is very abrupt and therefore noticeable. If it just doesn't want to pull and the hp curve is ragged, I would think ignition is your problem. Of course, you may be too rich for the ignition but I would suspect plugs and plugwires first.