10/10/2023 0 Comments Download full throttle jet skis![]() ![]() The fuel pressure can now be adjusted externally so I set the pressure at 60 at idle and at full boost it goes to 55. So I removed the internal fuel pressure regulator and filter and installed an external fuel pressure regulator and filter that returns excess fuel to the tank. Steve at kawiperformance says the fuel pressure should always be at 55, idle to full boost. ![]() I installed a new stock replacement pump from and now the pressure at full throttle goes from 55 to 50. I would post photos if there was an easy way to do so from an iphone.įuel pressure guage indicated around 55 psi fuel pressure at idle and 30 psi at full throttle/boost, which would be a good reason for the engine to miss. ![]() Update on my 2016 ultra 310x engine and pump that is in a boat that misses at full throttle. I would appreciate your consideration and suggestions. I assume the mass air flow sensor controls the fuel flow under boost. Next I will check the fuel filter/sock in the tank but after only 15 hours I doubt that is the issue. The 310X fuel pump is in the tank and is designed to not have a fuel return line to the tank. On cars the presence of boost signals the fuel pressure regulator to raise the fuel pressure and the boost pressure to the ECU also increases the duration of the injectors. I tried new spark plugs and checked all electrical and plumbing connections.įrom my years of turbo charging car engines, it feels like the ECU is not getting the message to give more fuel under boost from the supercharger. When you put it in ECO mode it runs without missing but has less power, acceleration and speed as expected. Normally the engine will rev to 7400 rpm. It seems to get worse the longer you run it as in only 10-15 minutes.Īt first it starts to miss at 6900 RPM and as time goes by the miss starts at lower to say 6200 rpm. The engine performed perfect for the first 10 hours and now misses on hard acceleration and full throttle. ![]() I stripped out the complete engine, pump, fuel system and electronics from a 2016 Kawasaki 310x (that only had 5 hours total on the boat since new) and installed it into an 11' aluminum white water jet boat. ![]()
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