Mailing List flyrotary@lancaironline.net Message #18014
From: Paul <sqpilot@bellsouth.net>
Subject: engine running poorly
Date: Sat, 26 Feb 2005 18:46:32 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Well, I finished scraping the foam out of my new cowling ram air scoop today. I put the cowling on and wanted to run the engine to see if I was getting sufficient outside air into the throttlebody to get the kind of rpm increases that I experienced with the top cowling removed last week.  Engine was hard to start, and when it did start, it was obvious that it was only running on one rotor.  I pulled the spark plugs for inspection, and they looked to be in good, clean condition. I then removed one injector plug and restarted the engine, and there was no change. (the injector closest to the water pump).  I then replaced that injector plug and removed the one closest to the PSRU and the engine would not run at all.  Well, now at least I know which rotor is producing power.  Because I ran the engine so hard during the ground runs last week trying to eliminate the vapor lock problem, (250 degrees water temp) I'm thinking it might be prudent to just replace the spark plugs regardless of how good they appear on the surface.
      Next, I will switch the two injector plugs to find out if it is the injector or the wiring to the injector that is causing the problem. (after replacing the spark plugs, of course).  Any other hints or suggestions you guys might come up with will be greatly appreciated. I did turn the prop thru a couple of times, and the sucking sounds of the engine seem to indicate that the apex seals are probably not suspect.
     Will update my findings soon.   Paul Conner
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