2001 z28

[Jmt23]

I can't figure it out but my car keeps sending p0131 p0151 and p0300 codes it's got headers and a volant air intake and a 3200 stall and it typically sends the code at higher speeds when WOT. We checked fuel pressure and it held at 59 psi when loading up on the converter to 3000 rpms.... I've switched MAFS and still having the issue also bank one send the code more often then bank 2. Any ideas or suggestions would be helpful


Sent from my iPhone using Tapatalk

[DanDalessandro]

What kind of o2 sensors you running? P0131 and p0151 are bank 1 sensor 1 and bank 2 sensor 1.
P0300 is multiple misfire detected.

[Jmt23]

Yeah I looked I had the codes come up with the original o2 sensors and I've also replaced one with a brand new Bosch sensor from napa


Sent from my iPhone using Tapatalk

[1BADAIR]

is it tuned for the headers?

[Jmt23]

It is not yet but that one thing I was wondering is if header could make it come up lean


Sent from my iPhone using Tapatalk