Chris Engler
Active Member
I have 10 hours or so on a new Barrett IO 360 with a Silver Hawk fuel injection servo in an RV8. All was well until today when I stopped by a local airport to top the tanks. As soon as I took off the engine started coughing and running rough. I pulled the power back and things smoothed out a bit but couldn't run much above 1/2 throttle (as I recall my fuel flow rate was around 6.5 gph at this point) without the missing/roughness. EGT's were high 1300s/low 1400s at 1/2 throttle and full rich on the mixture....much higher than normal. Clearly seemed to be fuel starved.
Once I landed, I pull each of the 4 injectors and minimal fuel would flow into a cup with mixture set to full rich and electric fuel pump on.
Pulled the fuel input to the injector and could flow 60 gph so plenty of fuel is getting to the servo.
Fuel pressure is 28 psi.
Fuel flow on the discharge side of the servo is rather low (not sure if this is normal). Had a spare servo so swapped the servos and still no joy.
In the past, I've pulled an injector and have seen excellent flow into a cup but for whatever reason, now it's little more than a trickle. Any thoughts/comments would be greatly appreciated!
Once I landed, I pull each of the 4 injectors and minimal fuel would flow into a cup with mixture set to full rich and electric fuel pump on.
Pulled the fuel input to the injector and could flow 60 gph so plenty of fuel is getting to the servo.
Fuel pressure is 28 psi.
Fuel flow on the discharge side of the servo is rather low (not sure if this is normal). Had a spare servo so swapped the servos and still no joy.
In the past, I've pulled an injector and have seen excellent flow into a cup but for whatever reason, now it's little more than a trickle. Any thoughts/comments would be greatly appreciated!