maybe2fast
NAXJA Forum User
- Location
- COMMERCE, MI
1996 XJ, 4.0, 99+ intake, cone intake, muffler, LT1 injectors.
long term is at -15.99% way rich and the ECM knows it, the LT1 injectors flow @25.5lbs @ 49psi
Factory LT1 specs
Ignition ON Engine OFF 41.0 to 47.0 psi
With Regulator Vacuum Applied [1] 3.0 - 10.0 psi less than Ignition ON Engine OFF REMARKS:
[1] May be checked with either of the following methods.
With Pressure Regulator Vacuum Line Attached at normal idle speed.
Ignition ON Engine OFF with 10 Inches Of Vacuum Applied To The Pressure Regulator.
If an adjustable FPR was installed these injectors could be matched perfectly to the ECM. Right?
Or am I better off making a MAP adjuster? The FPR sound much easier and would make the 6 nozzle LT1 injectors a perfect fit!
The reason for this post is I am worried that @ -15.99% the ECM might be maxed out as to how much fuel it can remove and I am running rich still and not getting the best MPG as I can.
long term is at -15.99% way rich and the ECM knows it, the LT1 injectors flow @25.5lbs @ 49psi
Factory LT1 specs
Ignition ON Engine OFF 41.0 to 47.0 psi
With Regulator Vacuum Applied [1] 3.0 - 10.0 psi less than Ignition ON Engine OFF REMARKS:
[1] May be checked with either of the following methods.
With Pressure Regulator Vacuum Line Attached at normal idle speed.
Ignition ON Engine OFF with 10 Inches Of Vacuum Applied To The Pressure Regulator.
If an adjustable FPR was installed these injectors could be matched perfectly to the ECM. Right?
Or am I better off making a MAP adjuster? The FPR sound much easier and would make the 6 nozzle LT1 injectors a perfect fit!
The reason for this post is I am worried that @ -15.99% the ECM might be maxed out as to how much fuel it can remove and I am running rich still and not getting the best MPG as I can.
