2000 volvo dpx500 idle problems
 

Hi I was just wondering if anybody can help me. I have a 30 campion chase 910 with a 500hp in it.(48hrs on unit) The motor barely idles more often stalls at start up and even when warm. You can not pull all the way back on the throttle when coming to a stop because the motor will ramp down and most of the time stall. I've done everything from a complete tune up to a new IAC motor. I've watched the plunger move when the motor come to a stall, but when idling it does not move when cold. I am lost, any ides. The computer was shipped out and came back all ok als. the boat runs strong when running but just doesn't want to idle.

Thanks