flyrotary@lancaironline.net Mailing List Archive

Hi Al,

I had the same problem too, but was keeping quiet. Today I went there again and had bad spark plug flooding problem. I had just checked and improved the vacuum hose for the MP to the EC2, so it was out of the question something could be wrong with the hose. Finally out of desparation after cleaning the plugs 10 times, i checked the hose again, and guess what? at one of the fittings the hose end had split. That cured the flooding problem. Had to reset the factory settings on the EC2, and now it starts much better.

Buly

Al,
Could you have knocked off a vacuum hose during your work on the upholstery, paint, etc. Might be worth checking.

Mark S.

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Monday, April 10, 2006 1:07 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: FI mystery

No, drained the fuel completely a couple of months ago. Put in new gas after moving to the hangar.

It may be something simpler; but the only thought I come up with so far is the mixture mapping was somehow corrupted. I’ll know more when I get out there and view the mixture mapping on the EM2.

Appreciate you guys spending some time thinking about this problem. I’m sure it will get resolved. I’ll give Tracy a call when he’s back and see what comes to his mind.

Al
Old gas?????

Bob Darrah
----- Original Message -----

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Sunday, April 09, 2006 8:27 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] FI mystery

I put about 4 - 5 hours of time on my engine installation months ago, and had everything pretty much “dialed in” for proper running from 1000 rpm up to max static rpm (~5200). Then it sat with no running for about 6 months while I did upholstery, paint and other stuff in my life. I’ve moved the plane to the airport, and got it all assembled. Yesterday rolled it out for an engine run-up.

Since the beginning it had always fired off after a few strokes, and I’d turn off the cold start switch seconds after it was running. This time I had difficulty in getting it started. Once I got it running, it would quit immediately when the cold start switch was turned off. Leaving the cold start “on” it runs fine above about 2000 rpm with the mixture turned toward lean to about 9:00 o’clock. Reducing rpm lower it wants to die. As I increase rpm above 2000 I need to rotate mixture knob significantly toward to richer to keep things smooth.

Fuel pressure, MAP, ignition, etc. all are normal. When I get the mixture knob adjusted it is smooth, so injectors are working on all three rotors. I didn’t take it above the staging point so it is running on one set of injectors. Haven’t had a chance yet to look at the mixture map on the EM2, and won’t get back to the airport until Monday.

I’m a bit baffled on what could have changed since last operation and what to check. Anybody have any similar experience? Ideas?

Al