---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Mon 03/13/06: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:21 AM - Re: engine monitor problem (JAPhillipsGA@aol.com) 2. 06:25 AM - Re: engine monitor problem (Pete Krotje) 3. 02:42 PM - Re: engine monitor problem (Jon) 4. 02:59 PM - Re: engine monitor problem (Jon) ________________________________ Message 1 _____________________________________ Time: 06:21:52 AM PST US From: JAPhillipsGA@aol.com Subject: Re: JabiruEngine-List: engine monitor problem --> JabiruEngine-List message posted by: JAPhillipsGA@aol.com Any chance your strobes are effecting it ? Maybe you should us shielded wire. ________________________________ Message 2 _____________________________________ Time: 06:25:17 AM PST US From: "Pete Krotje" Subject: RE: JabiruEngine-List: engine monitor problem --> JabiruEngine-List message posted by: "Pete Krotje" Jon, Try totally disconnecting the regulator. Let the engine run and all avionics power come from the battery with no charging input from the alternator and no chance of noise from the regulator. You may not get a tach input with the alt disconnected but if regulator or alternator noise was the problem the rest of the sensors should work right. Let us know if it makes any difference. It sure looks like it is EI's problem, though. Pete -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Jon Sent: Sunday, March 12, 2006 1:39 PM Subject: JabiruEngine-List: engine monitor problem --> JabiruEngine-List message posted by: "Jon" Hello group, I am working on a Zenith 601 XL with a Jabiru 3300 engine. We have installed an Electronics International MVP-50 engine monitor system. Unfortunately, the system is not functioning properly. Here are some symptoms: 1. When the engine is not running, everything seems to work properly. 2. When the engine is running, we see the following: A. RPM value on display looks good B. All values on the display associated with temperature (EGT, CHT, carb temp, oil temp) read very high and fluctuate fairly frequently C. All other values (volts, amps, oil press, fuel press, fuel flow, fuel level) seem to read accurately most of the time except they fluctuate regularly D. Error code "EDC" sometimes appears on various readouts (which EI says means the sensor hook-up box is sending nonsense to the display box) 3. The comm. radio seems to work fine with the engine running, and there is no appreciable noise. 4. Engine runs great and shows no magneto/firing problems. I have talked to EI, Jabiru, local electronics experts, and Bob. I ran the sensor wires as far from the "loud" wires as I could in front of the firewall. We tried running engine with one alternator wire (of two) completely disconnected. This had no effect. We installed a torroidal filter in the regulator output wire; this had no effect. EI rebuilt the EDC-33P sensor hook-up box, and this had no effect. We are contemplating having them rebuild the display box. EI wants me to find an electromagnetic radiation intensity meter and take readings. Can anyone shed some light on this problem? ________________________________ Message 3 _____________________________________ Time: 02:42:38 PM PST US From: "Jon" Subject: Re: JabiruEngine-List: engine monitor problem --> JabiruEngine-List message posted by: "Jon" Thanks for your response. The strobes have been off during all our tests. I mounted the strobe power supply box under the seat, so I don't think I will have a problem. I suppose we'll have to run that test after we fix this problem to verify proper function. ----- Original Message ----- From: Sent: Monday, March 13, 2006 8:20 AM Subject: Re: JabiruEngine-List: engine monitor problem > --> JabiruEngine-List message posted by: JAPhillipsGA@aol.com > > Any chance your strobes are effecting it ? Maybe you should us shielded > wire. > > > ________________________________ Message 4 _____________________________________ Time: 02:59:05 PM PST US From: "Jon" Subject: Re: JabiruEngine-List: engine monitor problem --> JabiruEngine-List message posted by: "Jon" Thanks for your response. So you're saying I might be getting noise from the regulator even if the alternator is disconnected? I'll try that test tomorrow. I talked to Bob N. on the phone today, and he had me run a test with the P-leads disconnected at the mags. This didn't help. He wants me to run the MVP system off of a different battery all together. One thing I haven't mentioned before is that we installed an EXP cockpit power control unit. [I noticed that Bob is not fond of these things while reading one of his archived debates.] It has an integral switch panel , master relay, and solid-state breakers. Is it possible that this gadget is somehow misbehaving in a way that would not show up on an oscilloscope? We put an oscilloscope on the power wire to the MVP system about 2 weeks ago with the alternator hooked up. It seemed to indicate that we were getting constant 12.4 volts, and that the AC portion of the power input was about 24mV at a frequency corresponding to 12 times the engine RPM. This made sense to me since the alternator has 12 spinning coils. ----- Original Message ----- From: "Pete Krotje" Sent: Monday, March 13, 2006 8:24 AM Subject: RE: JabiruEngine-List: engine monitor problem > --> JabiruEngine-List message posted by: "Pete Krotje" > > > Jon, > > Try totally disconnecting the regulator. Let the engine run and all > avionics power come from the battery with no charging input from the > alternator and no chance of noise from the regulator. You may not get a > tach input with the alt disconnected but if regulator or alternator noise > was the problem the rest of the sensors should work right. > > Let us know if it makes any difference. It sure looks like it is EI's > problem, though. > > Pete > > -----Original Message----- > From: owner-jabiruengine-list-server@matronics.com > [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Jon > Sent: Sunday, March 12, 2006 1:39 PM > To: jabiruengine-list@matronics.com > Subject: JabiruEngine-List: engine monitor problem > > --> JabiruEngine-List message posted by: "Jon" > > Hello group, > > I am working on a Zenith 601 XL with a Jabiru 3300 engine. We have > installed an Electronics International MVP-50 engine monitor system. > Unfortunately, the system is not functioning properly. Here are some > symptoms: > > 1. When the engine is not running, everything seems to work properly. > > 2. When the engine is running, we see the following: > A. RPM value on display looks good > B. All values on the display associated with temperature (EGT, CHT, > carb > temp, oil temp) read very high and fluctuate fairly frequently > C. All other values (volts, amps, oil press, fuel press, fuel flow, > fuel > level) seem to read accurately most of the time except they fluctuate > regularly > D. Error code "EDC" sometimes appears on various readouts (which EI > says > means the sensor hook-up box is sending nonsense to the display box) > > 3. The comm. radio seems to work fine with the engine running, and there > is > no appreciable noise. > > 4. Engine runs great and shows no magneto/firing problems. > > I have talked to EI, Jabiru, local electronics experts, and Bob. I ran > the > sensor wires as far from the "loud" wires as I could in front of the > firewall. We tried running engine with one alternator wire (of two) > completely disconnected. This had no effect. We installed a torroidal > filter in the regulator output wire; this had no effect. EI rebuilt the > EDC-33P sensor hook-up box, and this had no effect. We are contemplating > having them rebuild the display box. EI wants me to find an > electromagnetic > radiation intensity meter and take readings. > > Can anyone shed some light on this problem? > > >