PLT OF LANCAIR LC30 HAS PARTIAL ENG PWR LOSS. RECEIVES VECTORS AND MAKES SUCCESSFUL LNDG.

Narrative

I WAS FLYING FROM REDMOND; OR; TO PORTLAND AND WAS GIVEN A DSCNT TO 9000 FT AND A HDG OF 240 DEGS WITH DIRECT PORTLAND WHEN ABLE; THEN TURNED TO 190 DEGS FOR VECTORS TO ILS RWY 28R AT PORTLAND. DSNDING THROUGH ABOUT 9500 FT; I STARTED TO ADD A LITTLE PWR. THE ENG DIDN'T RESPOND. I SWITCHED FUEL TANKS; TURNED ON THE STAND-BY FUEL PUMP. THE ENG DIDN'T RESPOND. I NOTIFIED ATC THAT I HAD AT LEAST A PARTIAL ENG FAILURE; AND REQUESTED VECTORS TO THE NEAREST ARPT. THEY GAVE ME A HDG TO TROUTDALE ARPT. I KNEW I COULD MAKE IT TO TROUTDALE WITHOUT PWR; BUT CONTINUED TO WORK WITH THE ENG TO GET IT RUNNING. I BROKE OUT OF THE CLOUDS ABOUT 4500 FT ABOVE TROUTDALE; BUT I COULDN'T SEE TROUTDALE BECAUSE OF THE CLOUD COVER. I DID SEE PDX AND WAS IN POS TO GLIDE TO A LNDG ON RWY 28R. DURING MY DSCNT I TRIED LEANING THE MIXTURE IN CASE IT WAS A TURBO SPIN-DOWN PROB. THE ENG RESPONDED A LITTLE; BUT I CONTINUED TO TREAT IT LIKE A FAILURE BECAUSE I DIDN'T HAVE ANY WAY TO CONFIRM WHAT HAD CAUSED THE PROB. I LANDED WITHOUT FURTHER INCIDENT WITH THE ENG RUNNING. THE ENG AND ASSOCIATED SYS WERE INSPECTED AFTER THE LNDG. I FOUND EVERYTHING TO BE FUNCTIONING PROPERLY. AVOID PROLONGED LOW PWR SETTINGS.