|Originally posted by Shonyman32:|
Also the FPR is unplugged so it is running at max PSI of fuel pressure.
Doing this will confuse the ECM. The fuel pressure regulator should maintain a constant differential versus the manifold pressure. This is to offset the changes of air pressure in the manifold, so when the ECM commands a certain injector opening, it will actually spray a consistent amount of fuel.
If you're convinced that this behavior isn't working correctly, then that should be fixed. Running at a constant fuel pressure, while manifold pressure varies, will lead to inconsistent fuel delivery.
|Also when at a lower RPM and I push the gas it acts like the accelerater pump on a carb engine is out and the rpm's fall for a second.|
This could be a tuning issue. There is an "acceleration enrichment" factor which acts like the pump shot on a carburetor. When the ECM detects that the throttle has been snapped open, it sprays an amount of extra fuel which is programmed in the ECM. This factor would need to be adjusted for the change in your engine size and cam.
Elevated BLMs would result from the engine constantly needing more fuel than the ECM was programmed to assume.
I've never done a 3.2 + cam upgrade, so I don't know if the extent of your issues can all be blamed on ECM tuning, or not. It's an issue, but I don't know if it's the only one. 17lb injectors would at least crudely compensate, but retuning the ECM would still be desirable.