By: Grid Michal
I have a 2002 Volvo Penta 5.7l Gi with 360 hours that failed the WOT test. At 4600 rpm, the engine automatically reduces speed, and the alarm sounds. It’s not overheated, because it will throttle right back up to 4500 rpm but not 4600. I just had full service on it, and it runs fine at all other speeds, including stopping and starting. Any thoughts?
If the problem didn’t exist before the full service, I’d head right back to the servicing dealer. You paid for service, not problems. You need to have a diagnostic scan done by a qualified Volvo dealer. That’s the only way to interpret those anomalies.