Kahuna
Moderatoring
This one has me absolutely stumped. Here is the deal.
I have an RV-8 with an 0-360 and AFP fuel injection system. Having a problem with #1 cylinder that seems fuel related. At high MP the cylinder drops off lean. At 24?Mp its fine. As I increase the MP, the EGT on Cyl#1 rises in direct correlation with the MP until the cylinder drops off. Here is what I have done to chase this problem down.
Im stumped! And I dont get stumped easily. Nothing I have done has helped anything. I cant get the problem to move to another cylinder and even changing and installing new cylinders did nothing. On the chart data, Aux3 is MP. On take off, at just past 3min mark, I pulled MP back to keep EGT down and to prevent cylinder from dropping off. At 5.5min mark I increased MP and you can see cyl1 egt red color track up with MP until it drops off cold. At 9.5 and 10.5 & 13 min mark I slowly leaned to confirm cylinder was rich and would lean properly. At 14min mark I raised MP once again until cyl dropped off. Been chasing this for months now and Ive run out of things to do. Its acts like it has good fuel air mixture at 24"MP but then runs out of fuel as the air is increased with MP. Argh!
Thoughts and Ideas please.
I have an RV-8 with an 0-360 and AFP fuel injection system. Having a problem with #1 cylinder that seems fuel related. At high MP the cylinder drops off lean. At 24?Mp its fine. As I increase the MP, the EGT on Cyl#1 rises in direct correlation with the MP until the cylinder drops off. Here is what I have done to chase this problem down.
- Overhauled servo and Flow divider.
- Replaced engine monitor with new with new engine sensors.
- Replaced Mags with electronic ignition
- Moved injectors and inserts and rails around
- Installed new cylinders!
- Moved rails around to different pickups on flow divider.
Im stumped! And I dont get stumped easily. Nothing I have done has helped anything. I cant get the problem to move to another cylinder and even changing and installing new cylinders did nothing. On the chart data, Aux3 is MP. On take off, at just past 3min mark, I pulled MP back to keep EGT down and to prevent cylinder from dropping off. At 5.5min mark I increased MP and you can see cyl1 egt red color track up with MP until it drops off cold. At 9.5 and 10.5 & 13 min mark I slowly leaned to confirm cylinder was rich and would lean properly. At 14min mark I raised MP once again until cyl dropped off. Been chasing this for months now and Ive run out of things to do. Its acts like it has good fuel air mixture at 24"MP but then runs out of fuel as the air is increased with MP. Argh!
Thoughts and Ideas please.