You posted in the wrong section... hence the slow replies, I'm sure.
Is this in a GE or a GTE? GTE uses a KVAFM (Karmann Vortex); GE uses a VAFM (Vane)... As seen in the instructions there are a few different types of meter supported... they're all quite different and NOT cross compatible.
Sure your idle may be screwing up... you need to tune the fuel controller once it's installed and known to be functioning properly. On a bone stock system with no other mods, setting all the adjustments to 0 will have the engine running like is was before you added the controller.
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