air induction question

[adc174]

i just made an air intake for my 97 i basically removed the airbox and made a tray with sides and used a piece of 3.5" pvc pipe to connect them i used the stock filter for now ,looking for a k&n that will work.i installed the mass air flow to the throttle body stock box,it runs great the only problem is i get a flat spot at about 3500-4000 rpms at full throttle almost feels like a bad fuel pump, i reinstalled the stock air box and it was fine.any suggestions to why this happens,i put in my homemade intake again and i have been easy on the gas,i just dont want any damage to anything

[VinceTrifecta]

By moving the MAF, you may be altering how the air flows across it, and hence, how it is measured. If its hitting a flat spot, it's probably leaning out on you.

[DefEddie]

Is the screen removed on the MAF?

[VinceTrifecta]

Yeah, good point. Descreened MAFs can be much more sensitive to changes in airflow...

[DefEddie]

They also smooth out airflow at high RPM's for more accurate reporting..

[adc174]

the screen is still in but i have a tornado in the tube can that be it