drop in rpm: Fuel? Electric?

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drop in rpm: Fuel? Electric?

Postby Campo » Sat Apr 25, 2015 6:31 am

I am having some random drops when I am flying with 5000 rpm. However, the fuel pressure is not dropping.
I have try to switch off every electronic devices and, moreover, I have switch off every ignition to check every possibility.
The problem is appearing randomly and only for a few seconds.
I have changed all the fuel lines and fuel distribution because I was thinking on vapor lock.
I have not found water in carburetors.
Therefore, I don´t know what else to look. Could be some electric problem (Bad contact)? Where? Should I check water once and again?
Thank you
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