Oi! So I have the new 42.5# injectors in the car now and I have been having some minor issues with it. It has a slight off-idle stumble at low throttle settings with a light popping sound and a little power loss. Also, it seems to knock at much lower boost levels than previous, I was able to run about 14psi and the knock was audible! My thoughts: I still have the '85 MAF, but I converted to the '87 ECM. I have not yet connected the MAT senosr. Can this be causing these issues? Chip is a street chip from PT&E. Should I try and tune around it, or should I just grab a new MAF ($109!!!) and wire up the MAT and try again? Is it the tip-in stumble issue with the 009's? Could I be too lean on top and too rich on bottom? Any ideas?