Well i just bought a 99 26' donzi with a 502 and a m3 procharger on it. It starts fine but surges really bad like 900 to 1500 but it stays running. When i put it in gear it stalls out, if i try to give it gas, or if i let it idle in gear its will stall out after about 15 seconds. I am going to change plugs tomorrow and see if that works. Does anyone have any other ideas. Also there is a beeping like every 5 seconds. All fluids are good and full and guages are all where they need to be.

hint, hint....the beeping noise you hear is the ecm trying to tell you someting. pull the codes and start from there. just a thought

Im gonna run a scan tomorrow.

fuel pressure is too rich...

let us know what it was