SR20 Feels Like It's Holding Back?!?

[s13sr2oh]

I have put roughly 100 miles on the motor sense I have swapped it last week, I adjusted the timing and it hit hard the first 2 days I drove it, but recently it kinda stutters. When I hit boost it will hit hard then kinda bog like something is holding it back or it will just feel restricted the whole time, it's hit or miss. I was thinking it could be a bad MAF because there is a hairline crack on mine but it revs just fine so I am not really sure, or possibly the TPS could be out of adjustment because I had bought a new TB before the swap and have not touched it. Just curious why it ran great at first and now its hesitant. Any ideas?

[JDMRIDDAZ]

did u put a walboro 255 in?
mine did the same without one

[s13sr2oh]

did u put a walboro 255 in?
mine did the same without one

yea, that is what i am using

[Options13]

yeah my sr is doing the same thing

[Sileighty_85]

vacuum/boost leak

Check ECU for codes

[s13sr2oh]

i am pretty sure it's my maf. it's had a low rough idle so today i unplugged my maf and the idle was normal and consistent but as soon as i plugged it back in, it started running like dog crap again.

[Om1kron]

your car probably doesn't want you to kill yourself going fast.

[spools420a]

I'm voting possable minor boost leak,Leak down test it and hope this is all it is since its a cheap easy fix.Why your at it it wouldnt hurt to take a fine brush and clean the maf sensor with a little denatured alcohol if its a little dirty,check your error codes.

[s13sr2oh]

well i tired my old single cam maf and it still ran the same so i checked my ecu for codes and 12 came up which is mass airflow. shut the car off and check it again and 55 came up meaning nothing is wrong soo either my maf is toast or the wiring for it may have a bad connection.

[buentellomma]

check your wiring again, i had this problem, it would idle rough, rev fine but when i drove it , it acted crazy. it ended up being one of my mafs wires were slightly bent, swapped them out and it ran fine