Slow start
I recently purchased a 2021 mustang gt premium, and a few days later it’s taking a bit longer to crank than I would expect. Probably a full 2 seconds to turn over after hitting the button. This happens specifically if the car has sat overnight, no sluggishness after starting, and once started if I turn it off and back on it starts right away. Cranking sounds fine so I don’t suspect battery or starter.
I scanned the car and the only relevant code was a P008a archived code, and after clearing codes and driving for a few days no codes have come back up.
Based on the research I’ve done, I expect that my fuel lines are losing prime, because if I prime the fuel pump a few times before cranking the car, it starts just fine. Im wondering if this is a common issue with a known fix, I know the low pressure fuel sensor was a problem with the ecoboost models but there are no recalls for my gt when I look up the vin.
Everything I’m reading points to the fuel pump itself, but I’ve heard the sensor could also cause this problem, so unless it’s guaranteed that it’s the fuel pump, I’m leaning toward replacing the sensor just in case.
If I do need to go the fuel pump route, I’m a bit confused with the part nomenclature regarding “pump aseembly” “sending unit” etc. I’m guessing I need the $500 motocraft full assembly if I were to go oem? If I don’t need the entire assembly is there a cheaper way I can go? Because if I’m paying that much for an oem full assembly wouldn’t it be prudent to just throw a dw400 on it?
Just looking for a push in the right direction, thanks for your time