Hi All,
Over the weekend I went out to do some flying in my M20C. My typical startup procedure is to turn on the boost pump until it reaches the 6 PSI red line. Then I pump the throttle twice. Each time I pump the throttle, it drops 1 PSI per pump. So normally I'm around 4 PSI when I start the engine. Well this time, the fuel pressure stayed at 6 PSI after the two pumps. The engine fired up and ran normally but the fuel pressure jumped up to 7 PSI at idle. I tried all kinds of different power settings and nothing seemed to make much of a difference. If I turn on the boost pump while the engine is running, the PSI jumps up to 8 PSI.
The engine from all accounts seem to be running just fine. This is the first time in 10 years of flying this plane, I've seen this occurrence so any ideas would be appreciated!
Thanks,
Gary