03 super glide not getting enough fuel past idol. acts like a dead spot. but fine with full throttle.

no year generic answer the parts you changed are they compatible to the vehicle and any sensors or parts needed to be flashed

Check Fuel pump. The ethanol gas is rough on these diaphrams. they get holes in them and can't pump enough for High RPM

Running fuel/air too lean or maybe bad spark plug or wire. Just make sure wires are tight. Might be fouled.

fuel filter clogged or fuel pump problem

Throttle position sensor and idle air control valve

try the fuel presure regulater it should be on the fuel rail ( that is if it is the V-6 ) it hasone vacum line on it and it has i think like 6 screws holding it in. it will cause just that same problem it will also cause it to flood at idle and foul plugs and make it idle rough you may have to chage the plugs also. you might check the vacum to. it should run on stright vacum from the intake.

The Check engine light is the first place to start. UNFORTNUATLEY the code readers that the A/P stores have for sale and use won't read Powerstroke specific codes. You need to take it to a shop that uses a code reader that will or the Ford Dealer. Just a guess, but if your truck has the "flly by wire" throttle pedal ( no cable), then I would suspect the throttle pedal validation sensor. There is a known issue for a "dead spot" in the sensor in the go pedal assembly.

In most cases, if you'll make sure the fuel petcock is on (this should be vacuum controlled if it is the orginal petcock), pull the enricher out, twist the throttle twice, turn on the switch, and push the start button. DO NOT OPEN THE THROTTLE UNTIL THE ENIGNE STARTS UP. Your carburetor is equipped with an ENRICHER. An enricher circuit works differently from a "choke". If you open the throttle even a little while starting the bike, you'll render the enricher ineffective. You must leave the throttle completely closed until the engine starts up. Usually the enricher is rich enough that the engine goes to a high idle once it starts. But, on the other hand, you don't want to run the enricher for an extended time as it will foul your spark plugs. Allow the engine to run until it warms enough so that you can keep the engine running with the throttle then turn it off.

Good Luck
Steve

ok, assuming you replaced the carb header and stator with aftermarket parts, then I would say you definitely have a jetting issue. that flat spot is coming from your engine starving for fuel. its taking the gas too long to get from the carb to the engine. you would fix this by adjusting the idle mixture on the carb. the first thing I would do is look for the fuel mixture screw on the carb. im not familiar with your specific model. but the screw is usually found facing down on the bottom of the carb, directly in front of the bowl. when you find it, turn it counter clockwise about 1/2 turn at a time until that flat spot fades away. if that doesnt work, then you will need to up the size of the pilot jet inside the carb. maybe 1 or 2 sizes would be enough. if you replaced the carb with a bigger carb, then you may not be able to fix this problem. in my experience, larger carbs will increase power, but usually throttle response, especially low end, suffers considerably. the reason for this is lower intake velocity and vacuum. basically, with a bigger carb it takes a second longer for the fuel to be drawn from the carb and properly atomize with the air. hope this helps.if I overlooked anything let me know! some more info on the engine/modifications and carb/jet sizes would help too. good luck.