Low HP without intake sensor?, Is That happening to celica too? Options

[D-No-One]

sup guys..well, today i went and dyno test my car.... first run, car did really bad at wHP with 5sfe turbo... only 140 to the wheel...at 5psi... but, second time...they found some leaking boost. got that fix, and car did 155whp at 5psi too... but it suppose to be around close to 200hp at the crank. i lost my intake sensor so they dyno without the intake sensor and with engine light on... My question is " does celica run low hp without intake sensor?" cause those guys that i took my car to dyno..they told me that...but i asked some civic peoples they saythe same thing too..my cousin have a 98 gst spyder and he didnt plugs his air intake sensor and runs with check engine light on and his car was soo weak..but after he plugs the air intake sensor...his car run fine...so i was just wondering anyone knows about his?......

[Milds3vn]

Well think of it this way, if your car thinks its lacking or getting no oxygen at all then it will most likely cut the fuel back so it doesn't run to rich. It probably goes into a safety mode where it reduces its output to prevent damage. I dont know for sure but that would be my logic for engine management.