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XP-360 Very Rough Running Engine

 
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gra9933(at)bellsouth.net
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PostPosted: Sun Jan 15, 2006 6:11 am    Post subject: XP-360 Very Rough Running Engine Reply with quote

Listers:
I have an engine problem - maybe one of you can help. I just did the
first start of my engine 2 weeks ago and tried it again yesterday. Here
are the symptoms:
1) Brand-new XP-360 built by Aerosport Power with Airflow Performance
Fuel Injection, Lightspeed Plasma II+ electronic ignition on the top
(right), impulse-coupled mag on the bottom (left), running standard
100LL. Constant speed prop.
2) Starts up just fine, but runs very rough. Black smoke comes out upon
start. Will run above 1000 rpm, but will quit if I try to idle less than
1000. Runs better when I open the throttle - I got it up to about 1500
rpm when test running, so far. When running, makes a lot of 'popping'
sounds - almost like little backfires, I guess. I'm not smart enough on
engines to know what the sound means.
3) Makes more 'popping' sounds when running on the mag - runs a little
bit (noticeably) better on the electronic ignition, but still rough.
4) The engine was run at the factor before I got it and I have not
changed any settings on the ignition/mags/fuel injection since I got it.

My only theory right now, based on an archive search of the RV list, is
that the idle mixture might be too rich on the Airflow Perfomance. Do
these symptoms sound consistent with that problem? I'm disinclined to
think its an ignition/timing problem, since both ignition systems came
set up by Aerosport and neither one is significantly better than the
other in running the engine.

Thanks for any help you might have,

Jordan Grant
RV-6
Finally done, if the engine would behave...


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alexpeterson(at)earthlink
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PostPosted: Sun Jan 15, 2006 6:57 am    Post subject: XP-360 Very Rough Running Engine Reply with quote

Quote:


Listers:
I have an engine problem - maybe one of you can help. I
just did the first start of my engine 2 weeks ago and tried
it again yesterday. Here are the symptoms:
1) Brand-new XP-360 built by Aerosport Power with Airflow
Performance Fuel Injection,

SNIP

Quote:
Jordan Grant
RV-6
Finally done, if the engine would behave...

Jordan, the book which comes with the Airflow Performance unit is very
thorough in this regard. You are probably correct in guessing that the idle
mixture is way too rich. Refer to the book. I believe that when Bart runs
the engine, he uses a carb and not the injection system.

Alex Peterson
RV6-A N66AP 704 hours
Maple Grove, MN


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Rhonda(at)bpaengines.com
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PostPosted: Mon Jan 16, 2006 6:12 am    Post subject: XP-360 Very Rough Running Engine Reply with quote

Contact Bart or Sue at Aerosport and tell them the symptoms that you are
having. You will probably need to send the servo to Airflow Performance
and Don will check/repair it for you.

Rhonda
--


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gra9933(at)bellsouth.net
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PostPosted: Mon Jan 16, 2006 2:28 pm    Post subject: XP-360 Very Rough Running Engine Reply with quote

For the archives:

Jordan,

We have a filter that is standard equipment on our current systems but you
may have purchased yours before we started installing them in every unit.
Please see the attached document and verify that you do or do not have the
clamp filter shown in the picture. If you don't have one I will be happy to
send you a filter at no charge.

Let me know after you've checked for the filter if I need to send you one
and where.

Thanks,

Ken Chard
Advanced Flight Systems, Inc.
10714 S. Township Rd
Suite B
Canby, OR 97013
503-263-0037 phone
503-263-1163 fax
www.Advanced-Flight-Systems.com
www.Angle-of-Attack.com

--


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gra9933(at)bellsouth.net
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PostPosted: Mon Jan 16, 2006 2:31 pm    Post subject: XP-360 Very Rough Running Engine Reply with quote

For the archives:

I adjusted my fuel mixture today and the engine is now purring like a
kitten!! As it turns out, the engine was not running rich, it was
running too lean! I turned the adjustment about 1/2 turn (2 or 3 flats)
to the rich side of where it was when I received it. The engine started
right up and ran very nicely. Another flat to the rich side and it would
satisfy the 50 rpm rise test when pulling the mixture out.

My airplane is now ready to go fly.

Jordan Grant
RV-6 N198G
Ready to fly, just need to do weight/balance, and go fly it!!

[quote]--


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mstewart(at)iss.net
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PostPosted: Mon Jan 16, 2006 2:54 pm    Post subject: XP-360 Very Rough Running Engine Reply with quote

Don't forget to consider your altitude.
Assuming your in Goldsboro, NC your at sea level. But for others at
altitude, you would need to consider this in your adjustment. 50rmp rise
would not be enough if set in Denver and flown to Goldsboro, unless you
have a great best glide.
Best,
Mike
--


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shempdowling2(at)earthlin
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PostPosted: Tue Jan 17, 2006 9:21 am    Post subject: XP-360 Very Rough Running Engine Reply with quote

That sure seems sensitive. I can turn my Bendix injector full turns will
little change. Maybe mine is screwed up.

Shemp/Jeff Dowling
RV-6A, N915JD
235 hours
Chicago/Louisville

---


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