John Courte
Well Known Member
I searched through the archives and couldn't seem to find an answer or similar issue.
The engine starts OK with the throttle cracked and moving the mixture from lean to rich as it catches, boost pump on.
I can run the engine, and it's smooth at any rpm above 700, but if I advance the throttle "smartly," the engine quits. "Smartly," in this case is not abruptly, but no more than a 2-count from idle to runup RPM. I advance the throttle at the same rate I was taught during flight instruction.
The slower I advance the throttle, the better the chances of it continuing to run.
The problem seems to occur somewhere in the transition through 700 to 1100 RPM.
If I advance the throttle slowly enough, it gets it together and runs fine at 1800 RPM, with 100RPM mag drops on each side, as far as I can tell: I'm still getting used to the rpm lag on the digital tach.
Here's the equipment:
I have an O-360-F1A6 converted to fuel injection using a Superior Cold Air sump and Airflow Performance FM200 injection system. Ignition is from 2 Slick 4371 mags. The AFP system and sump was installed during an IRAN performed in early 2011 and the engine was run in the test cell, where no problems were reported, but I don't have detailed information on the test cell run.
I'm using the AFP electric boost pump and FloScan flow sensor. I tested the fuel flow from the boost pump just after wing install and it worked fine. The situation occurs whether the boost pump is on or not.
My mags are timed at 20 degrees, as indicated on the mag housing.
I hope someone can help me out on this one. I'm getting ready for inspection!
The engine starts OK with the throttle cracked and moving the mixture from lean to rich as it catches, boost pump on.
I can run the engine, and it's smooth at any rpm above 700, but if I advance the throttle "smartly," the engine quits. "Smartly," in this case is not abruptly, but no more than a 2-count from idle to runup RPM. I advance the throttle at the same rate I was taught during flight instruction.
The slower I advance the throttle, the better the chances of it continuing to run.
The problem seems to occur somewhere in the transition through 700 to 1100 RPM.
If I advance the throttle slowly enough, it gets it together and runs fine at 1800 RPM, with 100RPM mag drops on each side, as far as I can tell: I'm still getting used to the rpm lag on the digital tach.
Here's the equipment:
I have an O-360-F1A6 converted to fuel injection using a Superior Cold Air sump and Airflow Performance FM200 injection system. Ignition is from 2 Slick 4371 mags. The AFP system and sump was installed during an IRAN performed in early 2011 and the engine was run in the test cell, where no problems were reported, but I don't have detailed information on the test cell run.
I'm using the AFP electric boost pump and FloScan flow sensor. I tested the fuel flow from the boost pump just after wing install and it worked fine. The situation occurs whether the boost pump is on or not.
My mags are timed at 20 degrees, as indicated on the mag housing.
I hope someone can help me out on this one. I'm getting ready for inspection!