CM870 ROUGH IDLE

[kingdom]

I HAVE A CM 870 HERE WITH A ROUGH IDLE. I REMOVED METERING ACTUATORS AND DID THE BLOCK OFF TEST AND FOUND #5 INJECTOR WAS BAD. REPLACED IT AND IT RUNS BETTER BUT STILL A ROUGH IDLE. I CONNECTED FUEL PRESSURE TEST HGUAGE TO PORT ON FRONT OF GEAR PUMP AND I HAVE 210PSI AT LOW IDLE. IF I AM CORRECT I BELIEVE I SHOULD HAVE 230 TO 270. I HAVE ISOLATED FUEL LINES OUT AND WENT DIRECTLY FROM A BUCKET OF FUEL TO THE LIFT PUMP AND STILL NO CHANGE IN PRESSURE. IF I REMOVE THE ELECTRICAL CONNECTOR FROM ONE OF THE TIMING ACTUATORS THE PRESSURE MIGHT RIGHT 5 TO 10 PSI. I AM LEANING TOWARD THE GEAR PUMP BUT IM NOT SURE. ANY HELP WOULD BE GREATLY APPRECIATED.