low blms

[1fast6]

car has been doing good for a while. No changes made. Now low blms.
At idle and cruising I am seeing bls of 118 when I left off the gas when driving the go up to 128.
Not sure if MAF is stock. Can only find graneteli stamped on it. Probably gonna do the ls1 MAF swap this winter.
Other readings at idle are
AF 6
L8 45
INT 128
ATS 137
TPS 44
IAC 13

FP is set at 38# with line off.


Any ideas other than MAF.
Also I have a d/s header leak or crossover pipe. Haven't got a good look at it yet to see exactly what is leaking but I can hear it.

This just started yesterday. Was running 128 bls with good idle.

EDIT: 12% fuel added WOT thru all gears. 93 octane 17# boost

 

[Razor]

Bad MAF.
Your low BL=too much fuel pressure. But then your chip typically calls for 43 psi line off.. so your at 38 lbs.. meaning 5 lbs low.. meaning your having to add fuel on the chip because of the reduced FP.

Get an LT1 or LS1 sensor and translator.. call it a day.

I dont know anyone running a Graneteli on a Buick. Probably because it sold for like 450.00. For that much coin.. they could have had a translator and LS1 MAF with money to spare.

 

[1fast6]

sounds good. thanks.