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Very little diagnostic info in message Steve.
Same questions as usual:
A & B same? I did try both controllers and they were the same Mixture knob make any difference when running? Yes - It would only run when set rich - 3 o'clock position - It died after 2 or 3 seconds when I turned it to 12 o'clock.
I also reset mode 1 2 4 and 8 to default before the last run. no change
Either Coil disable (leading/trailing) make any difference? I didn't try this Exhaust temp is better indicator of dead rotor. EGTs the same? I didn't look at this while it was running - still not too familiar with the EM3, nor have I confirmed that EGT is working.
Would engine respond to throttle when running? What rpm did it run at? Yes - It responded to throttle. I don't know what RPM exactly, but I'd guess it was about 2500 RPM. When I tried to throttle it down, it died.
Zero rpm indicates that primary injector is not firing. (The one that the EM2 is hooked to).
RPM during cranking indicates that you are getting pulses then. Sure EM2 is not hooked to secondary injector? (which would fire during cranking due to high MP) - I suspect that you are correct. I will have to verify that it is connected to rotor 1 primary.
I was reviewing the EM-3 connections in the manual, and I have a question. AQM TB4-13 - I have it connected to the display pin 17, but I also see that it is labeled as VSS/Ground. Should I have also connected this to ground near the AQM ? The drawing on page 12 of the EM-3 manual shows it as just running between the AQM and display.
Steve
Tracy
On Mon, Nov 30, 2009 at 12:30 PM, Stephen Brooks <cozy4pilot@gmail.com <mailto:cozy4pilot@gmail.com>> wrote:
I started the new engine this weekend, after getting the
intermittent spark issue resolved, only to discover that I have
some other issue.
When I tried to start the engine, it popped several times on
successive turns, but wouldn't start. After trying several times,
I did get it to start, but it seemed to only be running on one
rotor. It died after 10-15 seconds, and I could not get it to
restart, so I pushed it back inside and charged the battery.
I tried it again yesterday, and had a very hard time getting it to
start. It finally started, and I ran it for about a minute. It
ran very rough, and felt to me like it was running on only one
rotor again. After shutting it down, I felt both rotor housings
to determine which one was running, and I was surprised that both
felt the same temperature. I suppose that this means that it was
running on both rotors, but very rough, and not much power. Both
were warm, but definitely not hot after only a minute or so of
running.
I get a consistent popping when cranking it over, that feels like
the timing is way off. I double checked the static timing and
verified it was 35 BTC. I tried moving it to about 25 BTC, and
while I did not get it to start, the popping was the same.
I also verified that the injectors were wired correctly, by
checking each one from the EC-2 connector. The injector
diagnostic, and ignition diagnostic check fine. The only thing
that I noticed that was odd was that while cranking, the EM-3
showed RPM (250-300), but while running it was reading zero.
It has been several months since I've added any fuel, so I was
thinking of draining the fuel tank, and putting in some fresh
fuel, but I suspect that is not the issue.
It seems to me that the timimng is way off or something.
Steve Brooks
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