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Hermes SMTP Server) with ESMTPA ID 7b67f3f14742ffd5016e8673c6c9eeef; Sun, 11 Jan 2026 19:57:35 +0000 (UTC) Content-Type: multipart/alternative; boundary="------------F2a5A70KG200IFsGCxuScqlr" Message-ID: Date: Sun, 11 Jan 2026 14:57:18 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [FlyRotary] Re: Renesis EC2 ?A? Computer INOP To: Rotary motors in aircraft References: Content-Language: en-US In-Reply-To: X-Mailer: WebService/1.1.24866 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.aol X-SPAM-LEVEL: Spam detection results: 0 AWL -0.202 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain DMARC_PASS -0.1 DMARC pass policy HTML_FONT_SIZE_HUGE 0.001 HTML font size is huge HTML_MESSAGE 0.001 HTML included in message KAM_MXURI 1.5 URI begins with a mail exchange prefix, i.e. mx.[...] RCVD_IN_MSPIKE_H2 -0.01 Average reputation (+2) SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [lancaironline.net] WEIRD_PORT 0.001 Uses non-standard port number for HTTP This is a multi-part message in MIME format. --------------F2a5A70KG200IFsGCxuScqlr Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit When I was troubleshooting why the 13B in my RV-3B would not start, I actually removed the injectors and fuel rails from the engine and (with fuel pump running) saw a fine mist from each injector in injector test mode. However, that is not the case here because we know all the injectors work with the B controller, so we're just trying to see if primary injector drivers in the A controller have gone bad. But I agree that it's more likely that MAP table in controller A has been corrupted. That would be checked by swapping A and B chips. If it now runs, it would be easy to copy A to B and be all done. I do understand any reluctance to removing and reinstalling chips, but should be safe with careful work and static electricity protection (by testing so far we know that the power supply for controller A is working OK or ignition and injector test modes wouldn't have worked.) Finn On 1/11/2026 12:25 PM, David COOK hoursaway1@comcast.net wrote: > Use an injector node tester for each injector elect. test, will not > tell if mechanical release of fuel only elect. from controller. >> On 01/10/2026 8:11 PM EST Finn Lassen finn.lassen@verizon.net >> wrote: >> Sorry for the multiple posts. Not quite with it today. >> Here's another idea. We now know the injectors are working -- but all >> four? >> If only secondary injectors work then engine will die. >> Not sure how easy it is for you to get to injector connections, but >> you try to disconnect all but one at a time (in test mode) to make >> sure each of the four actually work. >> Finn >> On 1/10/2026 12:07 PM, Doug Lomheim rv9flyer13b@gmail.com wrote: >>> Finn:  Thanks so much for these additional steps to try! >>> Looks like we can rule out “0, 3, 4” (?) since the injectors click >>> away and the leading and trailing plugs fire up nicely? >>> Can’t we also rule out “1” (Injector drivers) since the injectors >>> operated nicely in Mode 0 when “priming”? >>> Also, does this rule out a possible CAS issue…maybe the CAS circuit >>>  is somehow used in firing the plugs at “3,000 rpm” in mode 8? >>> Doug >>> Message Header.gif >>> >>> >>> Undecoded Message.gif >>> >>> >>> Would be interesting to know which part of the A controller failed. >>> 0) 5V power regulator >>> 1) Injector drivers >>> 2) Ignition coil drivers >>> 3) Crank angle sensor input. >>> 4)  MCU itself. >>> >>> Do the injectors click when you press the Store button or when you >>> put it into injector test mode? >>> Do the spark plugs fire when you put it into test mode? >>> If either of those work we can rule out 0, 3 and 4. >>> >>> As for compatibility, the main difference between 13B and Renesis is >>> the crank angle sensor output. The 13B has magnetic pickups and the >>> Renesis has a timing wheel, so you can't switch them without >>> reprogramming. >>> Then there is dwell time -- depends on iginition coils you use. >>> I suspect that other differences can be handled by tuning. >>> >>> Finn >>> >>> >>>> On Jan 9, 2026, at 4:59 PM, DOUGLAS LOMHEIM wrote: >>>> My Renesis “A” processor went INOP a few weeks ago, and I’ve done >>>> the following:  a). Verified 12 V to BOTH EC2 power pins.  b). >>>>  Verified continuity from OAT two wire thermistor to EC2.  c). >>>>  Replaced thermister with the one on my 9A project.  d).  Opened >>>> the EC2 to ensure the micro processor was still seated in its’ socket. >>>> The “A” side is still not functioning, and must be started on the >>>> “B” side, and when switched to “A”, it immediately dies. >>>> >>>> Are there any other trouble-shooting steps I should try? >>>> >>>> Thx.  Doug >>>> >>>> P.S.  I believe Tracy did some special EC2 processing on  Renesis >>>> EC 2s, vs RX-7 13B?  I think I have two extra EC2s, so could swap >>>> them out IF they are compatible with each other… >>>> >>>> Thx for your inputs, Doug >>>> Sent from my iPhone >> --------------F2a5A70KG200IFsGCxuScqlr Content-Type: multipart/related; boundary="------------BbzWVl4tCQaBDtoSXS7anb40" --------------BbzWVl4tCQaBDtoSXS7anb40 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
When I was troubleshooting why the 13B in my RV-3B would not start, I actually removed the injectors and fuel rails from the engine and (with fuel pump running) saw a fine mist from each injector in injector test mode.

However, that is not the case here because we know all the injectors work with the B controller, so we're just trying to see if primary injector drivers in the A controller have gone bad.

But I agree that it's more likely that MAP table in controller A has been corrupted. That would be checked by swapping A and B chips. If it now runs, it would be easy to copy A to B and be all done. I do understand any reluctance to removing and reinstalling chips, but should be safe with careful work and static electricity protection (by testing so far we know that the power supply for controller A is working OK or ignition and injector test modes wouldn't have worked.)

Finn

On 1/11/2026 12:25 PM, David COOK hoursaway1@comcast.net wrote:
Use an injector node tester for each injector elect. test, will not tell if mechanical release of fuel only elect. from controller.
On 01/10/2026 8:11 PM EST Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
 
 
 
Sorry for the multiple posts. Not quite with it today.
 
Here's another idea. We now know the injectors are working -- but all four?
If only secondary injectors work then engine will die.
Not sure how easy it is for you to get to injector connections, but you try to disconnect all but one at a time (in test mode) to make sure each of the four actually work.
 
Finn
 
On 1/10/2026 12:07 PM, Doug Lomheim rv9flyer13b@gmail.com wrote:
Finn:  Thanks so much for these additional steps to try!  
 
Looks like we can rule out “0, 3, 4” (?) since the injectors click away and the leading and trailing plugs fire up nicely?
 
Can’t we also rule out “1” (Injector drivers) since the injectors operated nicely in Mode 0 when “priming”?  
 
Also, does this rule out a possible CAS issue…maybe the CAS circuit  is somehow used in firing the plugs at “3,000 rpm” in mode 8?
 
Doug 
 
 
  Message Header.gif

Undecoded Message.gif
Would be interesting to know which part of the A controller failed.
0) 5V power regulator
1) Injector drivers
2) Ignition coil drivers
3) Crank angle sensor input.
4)  MCU itself.

Do the injectors click when you press the Store button or when you put it into injector test mode?
Do the spark plugs fire when you put it into test mode?
If either of those work we can rule out 0, 3 and 4.

As for compatibility, the main difference between 13B and Renesis is the crank angle sensor output. The 13B has magnetic pickups and the Renesis has a timing wheel, so you can't switch them without reprogramming.
Then there is dwell time -- depends on iginition coils you use.
I suspect that other differences can be handled by tuning.

Finn
 
 

On Jan 9, 2026, at 4:59 PM, DOUGLAS LOMHEIM <dlomheim@aol.com> wrote:
My Renesis “A” processor went INOP a few weeks ago, and I’ve done the following:  a). Verified 12 V to BOTH EC2 power pins.  b).  Verified continuity from OAT two wire thermistor to EC2.  c).  Replaced thermister with the one on my 9A project.  d).  Opened the EC2 to ensure the micro processor was still seated in its’ socket.  
The “A” side is still not functioning, and must be started on the “B” side, and when switched to “A”, it immediately dies.   

Are there any other trouble-shooting steps I should try?

Thx.  Doug

P.S.  I believe Tracy did some special EC2 processing on  Renesis EC 2s, vs RX-7 13B?  I think I have two extra EC2s, so could swap them out IF they are compatible with each other…

Thx for your inputs, Doug
Sent from my iPhone

 


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