182 lean of peak

[Triple J]

I've been struggling with LOP operations on my 182P with an IO-470-F Peterson conversion. The engine runs rough and has significant EGT variations at high power settings.

I've tried a few things, including adjusting the throttle valve, but the issue persists. A potential cause could be an intake manifold leak, particularly around cylinders 2, 4, and 6. However, this leak might only manifest under high-power conditions.

I'm seeking advice on diagnosing and resolving this issue. Any insights or suggestions would be greatly appreciated.

 

[Toga Cruiser]

I've been struggling with LOP operations on my 182P with an IO-470-F Peterson conversion. The engine runs rough and has significant EGT variations at high power settings.

I've tried a few things, including adjusting the throttle valve, but the issue persists. A potential cause could be an intake manifold leak, particularly around cylinders 2, 4, and 6. However, this leak might only manifest under high-power conditions.

I'm seeking advice on diagnosing and resolving this issue. Any insights or suggestions would be greatly appreciated.

 

[Jack Horn]

Did you get your injectors flow matched; eg. Gami? Check out Gami website and look into the lean test. Full set up from Gami is around $1500.

 

[Raymo]

I've been struggling with LOP operations on my 182P with an IO-470-F Peterson conversion. The engine runs rough and has significant EGT variations at high power settings.

I've tried a few things, including adjusting the throttle valve, but the issue persists. A potential cause could be an intake manifold leak, particularly around cylinders 2, 4, and 6. However, this leak might only manifest under high-power conditions.

I'm seeking advice on diagnosing and resolving this issue. Any insights or suggestions would be greatly appreciated.

Induction leaks have little effect at high MAP, so not likely a contributing factor. You should perform mixture sweeps and upload your data to Savvy Aviation so you can determine if one or more cylinders is running more rich. If you have GAMI injectors, the mixture spread should be .5 GPH or less. Any cylinder that is more lean can have its injector cleaned in Hoppes #9 using an ultrasonic cleaner to see if it helps your mixture spread.

Weak spark on one or more plugs could also be a contributing factor.



Ray