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boat dies when returning to idle PLEASE HELP!
mrredfolks posted a topic in Centurion Boat Maintenance, Performance, Troubleshooting
Im starting a new thread on this topic because i have seen several people post about this but no one has ever came back and said YES this is what fixed my problem. I have a 07 Avy 5.7 liter black scorpion Not showing any codes on the computer One day the boat died after surfing. Start back up no problem. Does it again when returning to idle position . So what i have found is that the boat will die after going from a throttled up position back to neutral. Here is a list of things already done. There has been some improvement but still will die. ESPECIALLY when throttling up and going back down to neutral. (like when you would be putting the boat on the trailer) AND i have noticed that it starts to fall off as soon as the V-DRIVE LIGHT comes ON. If i have the boat in gear but under the 1200 rpm so the light stays on i can go back and forth from neutral, but as soon as i go over the 1200 rpm and back it will die. Diagnosed with low fuel pressure 34-35 psi Changed low pressure fuel pump and high-pressure fuel pump and fuel pump regulator Running about 40 psi now. THere was improvement, but the more it runs seems like the worse it gets The IAC valve was replaced at the beginning of the year, and it shows it running when hooked up to the computer. I THINK this may not be working properly. (bad part?) Does anyone have any thoughts on this I read that a blown intake gasket or a throttle body gasket could produce same symptoms. Distributer cap and rotor look fine. Also replaced at the beginning of the year. After taking off the Throttle body there was a lot of oil present. Could this be due bad PCV valves these have not been replaced. Looked at vacuum hoses could not see anything out of the ordinary. I feel like it is a air problem at this point in time. Since all of the fuel system has been replaced. I am thinking either blown gaskets or some type of vacuum leak? MAP Sensor? Throttle Position sensor? Please Help!!!!