Accelerator Pump Setting

While the EFI Mustang does not have an accelerator pump, the language has been carried over to the EEC. What it describes is the tip-in sudden fuel enrichment required by the engine for maximum performance when you slam the throttle wide open. Why this is very important is readily apparent to anyone who has tuned a carburetor accelerator pump for both volume and rate of delivery. Remember messing with pump cams, shooter sizes, and extra large cc pumps? Remember why it was important? If that stuff is not closely tuned to your combination, you would lose horsepower, and in a drag race situation you will NOT go as fast as you could with the accelerator pump set up properly. Those of you with bread box intakes or heavily supercharged cars know that unless you run a severely rich air/fuel mixture, you get a low end (or even off-idle) bog. Why? Because the stock settings are lean to begin with, and without changing the delivery rate and amount, you will always have that bog. It is not the fault of the bread box design or the injectors. You need more fuel immediately when you slam the throttle wide open. We can fix the rate of opening and the volume delivered by the injectors for maximum performance.