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Topic-icon SENECA 3 1981

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1 year 1 month ago #992

I WAS FLYING NORMAL ALL THINGS GOOD THEN MY MANIFOLD PRESSURE DROPED FROM 31.5 IN CRUISE DOWN TO 25 INCHS THEN BACK UP TO 33 INCHS. IT WENT BACK AND FORTH SEVERAL TIMES. I ADVANCED THROTTLE AND PULLED THROTLE AS NEEDED AND ADJUSTED MIXTURE THEN IT STOPED AND THINGS WENT NORMAL AGAIN. I FLEW BACK TO AIRPORT ABOUT 20 MINUTES ALL WAS NORMAL. AFTER THAT I DID SEVERAL RUN UPS ALL GOOD . THE TURBO CHARGER EITHER WORKS OR NOT AND THE WASTE GATE IS FIXED-. NOT ABLE TO DUPLICATE IT AGAIN - ANY IDEA FROM ANYBODY - THANKS RICHARD ROWE IN CORPUS CHRISTI TEXAS

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1 year 1 month ago #993

Where there any other indications besides the MAP? I am trying to eliminate instrument error. I am also wondering if there are any fuel flow fluctuations or temperature change that might suggest a fuel issue. If not, I would check the turbo and see if it is turning freely.

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