Saw this post on the hondata forums and was wondering if anyone else has looked into the high pressure fuel pump from the nsx Have you guys looked into the nsx high pressure fuel pump I confirmed that it will bolt up to a k20c1 engine The low pressure inlet line needs to be clocked slightly. You are talking about the low pressure pump mounted in the fuel tank I'm getting mine replaced this tuesday
Your title speaks to the direct injection pump like the one i showed in my pictures My buddy has your car and he got his low pressure pump replaced a couple weeks ago by the dealership. Hondata fuel system in tank fuel pump uses the same (dw300c ), 90% of my customer issues with the intank pump is not the pump itself , is the fuel basket hitting the bottom of the pump strainer due the aftermaket pumps are bigger in size and making the orings deform and leak the fuel pressure that why the fuel pressure drops at the hpfp feeding. So this past tuesday i went to my local dealer for the high pressure fuel pump recall on my 2018 honda civic si, i got my car at the end of the day and everything was working fine until yesterday which was sunday I was driving normally and then a check engine light just came on So i seem to have a problem with my injectors or high pressure fuel pump but my usual shop says they don’t have the knowledge or experience with the new gen to know what to look for and they don’t want to charge me to start replacing things without being sure it’ll fix it
Has anyone tried the dw300c fuel pump and logged the fuel pump duty cycle data Per dw, the dw300c provides 62% more flow than the factory pump, but the actual increase at the high pressure fuel pump will be something less I realize there's a $2,800 kit from, but not everyone is interested in. Hook a high pressure fuel gauge up to the fuel rail Manually power up the hpff with 12 to it's pins This will not tell you if the ongoing fuel delivery rate is sufficient but it will tell you if there is enough fuel pressure from the pump for it to start.
If your low pressure fuel side is dropping pressure under wot then the lpfp needs to be upgraded But usually di fuel pressure drops are from the di pump not being able to keep up with fuel demand The only ways to resolve that are with a larger pump or stroking the pump more with a larger lobe on the cam.
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