Threw Code after nozzle&fueling box install

Installed some nozzles and a box yesterday and under hard(read racing an eclipse)driving my glow plug light started flashing and the check engine light came on, pluged in the vag-com and this is what i pulled:
17762 Modulating Piston Movement Sensor(G149):Electrical Malfunction
P1354-35-10 Intermittent

any ideas, after clearing the code it hasnt come back except when i was driving "hard"....thanks in advance

by 'box' do you mean tuning box? If so, they are notorious for generating faults.

Maybe the connection for the needle lift sensor on inj #3 wasn't making good contact. Put mamas penicillin in there... Silicone dielectric! It even works as a salad dressing!

yeah, a tuning box, believe the manufacture is dieseltuning, ended up pulling the box out because the clutch was slipping....

so..., it could just be the connector on the wiring coming off the #3 injector being loose or not making a good conection(even if it only under hard throttle/shifting)......, i did have a prob with the #3 injector leaking because it didnt seat right when I first installed the nozzles, but the leak has been fixed, I've randomly checked it a few times after driving around...