---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Mon 06/24/13: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:18 AM - Re: lightspeed ignition troubleshooting (Robert Brunkenhoefer) 2. 07:34 AM - Re: Re: lightspeed ignition troubleshooting (Bob Collins) 3. 07:39 AM - Re: lightspeed ignition troubleshooting (brunk) 4. 07:40 AM - Re: Re: lightspeed ignition troubleshooting (Dave Saylor) 5. 08:42 AM - Re: Re: lightspeed ignition troubleshooting (scott bilinski) 6. 08:43 AM - Re: lightspeed ignition troubleshooting (brunk) 7. 11:50 AM - Re: lightspeed ignition troubleshooting (brunk) 8. 12:11 PM - Re: Re: lightspeed ignition troubleshooting (Bob Collins) 9. 04:04 PM - Re: Re: lightspeed ignition troubleshooting (Scott Bilinski) 10. 04:16 PM - Re: LightSpeed ignition troubleshooting (Vincent Himsl) ________________________________ Message 1 _____________________________________ Time: 07:18:22 AM PST US Subject: RV-List: Re: lightspeed ignition troubleshooting From: Robert Brunkenhoefer On Jun 24, 2013, at 9:16 AM, Robert Brunkenhoefer wrote: > I have been trying to troubleshoot a drop of 250 rpm on run up on my light speed side. I usually get 0 drop. I also show a 250 degree rise above the other cylinders in the 3 and 4 egt. Cht is normal for all. I have done all the troubleshooting in the manual supplied by Klaus. We have spoken a lot about this problem. I would like to fly my plane somewhere nearby to someone who is familiar withs these units so I can get back to the perfect way it was for 5000 plus hours. thanks. I am based at KCRP, corpus christi , texas. Robert Brunkenhoefer N661G 600 hours plus ________________________________ Message 2 _____________________________________ Time: 07:34:06 AM PST US From: Bob Collins Subject: Re: RV-List: Re: lightspeed ignition troubleshooting So when you take the coil-to-plug leads off and you pull the prop through, you're getting the spark jumping across the leads on the coil, right? And at the right time? On 6/24/2013 9:17 AM, Robert Brunkenhoefer wrote: > > > On Jun 24, 2013, at 9:16 AM, Robert Brunkenhoefer wrote: > >> I have been trying to troubleshoot a drop of 250 rpm on run up on my light speed side. I usually get 0 drop. I also show a 250 degree rise above the other cylinders in the 3 and 4 egt. Cht is normal for all. I have done all the troubleshooting in the manual supplied by Klaus. We have spoken a lot about this problem. I would like to fly my plane somewhere nearby to someone who is familiar withs these units so I can get back to the perfect way it was for 5000 plus hours. thanks. I am based at KCRP, corpus christi , texas. Robert Brunkenhoefer N661G 600 hours plus > > ________________________________ Message 3 _____________________________________ Time: 07:39:51 AM PST US Subject: RV-List: Re: lightspeed ignition troubleshooting From: "brunk" Yes, that is correct. spark plug leads were replaced and coil to 3 and 4 was replaced, as well as all spark plugs. connections were checked on both ends of the system. -------- Robert E. Brunkenhoefer Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403302#403302 ________________________________ Message 4 _____________________________________ Time: 07:40:16 AM PST US Subject: Re: RV-List: Re: lightspeed ignition troubleshooting From: Dave Saylor I've found LS to be pretty sensitive to dirty plugs. It's early on the troubleshooting checklist but even of they looked ok you might try a new set. I just had that work for me under similar circumstances. In my case the plugs were only 3 hours old and just looked a little used but not bad at all. New plugs did the trick. On Monday, June 24, 2013, Robert Brunkenhoefer wrote: > > > > > On Jun 24, 2013, at 9:16 AM, Robert Brunkenhoefer > > wrote: > > > I have been trying to troubleshoot a drop of 250 rpm on run up on my > light speed side. I usually get 0 drop. I also show a 250 degree rise above > the other cylinders in the 3 and 4 egt. Cht is normal for all. I have done > all the troubleshooting in the manual supplied by Klaus. We have spoken a > lot about this problem. I would like to fly my plane somewhere nearby to > someone who is familiar withs these units so I can get back to the perfect > way it was for 5000 plus hours. thanks. I am based at KCRP, corpus christi > , texas. Robert Brunkenhoefer N661G 600 hours plus > > -- Dave Saylor 831-750-0284 CL ________________________________ Message 5 _____________________________________ Time: 08:42:58 AM PST US From: scott bilinski Subject: Re: RV-List: Re: lightspeed ignition troubleshooting Do you have the old RG-58 coax cable to the coils? This caused me trouble, replaced it with RG-400 cable problem solved.=0A-=0AScott=0A=0A=0A_______ _________________________=0A From: brunk =0ATo: rv-lis t@matronics.com =0ASent: Monday, June 24, 2013 7:39 AM=0ASubject: RV-List: Re: lightspeed ignition troubleshooting=0A =0A=0A--> RV-List message posted by: "brunk" =0A=0AYes, that is correct. spark plug le ads were replaced and coil to 3 and 4 was replaced, as well as all spark pl ugs. connections were checked on both ends of the system.=0A=0A--------=0AR obert E. Brunkenhoefer=0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp ://forums.matronics.com/viewtopic.php?p=403302#403302=0A=0A=0A=0A=0A=0A ============= ________________________________ Message 6 _____________________________________ Time: 08:43:31 AM PST US Subject: RV-List: Re: lightspeed ignition troubleshooting From: "brunk" Dave, I replaced the plugs with new ones and experienced no change from that. -------- Robert E. Brunkenhoefer Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403315#403315 ________________________________ Message 7 _____________________________________ Time: 11:50:29 AM PST US Subject: RV-List: Re: lightspeed ignition troubleshooting From: "brunk" This is the original coax cable . I do not know the number of it. Would it cause the symptoms I described? Was that your problem it corrected? -------- Robert E. Brunkenhoefer Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403333#403333 ________________________________ Message 8 _____________________________________ Time: 12:11:31 PM PST US From: Bob Collins Subject: Re: RV-List: Re: lightspeed ignition troubleshooting If you're getting a spark jumping across the leads, I doubt it's the coax. You've changed the spark plugs (and the copper washers, right?) and if you're EGT is going up , those plugs aren't firing. The next thing I would eliminate as a possible cause are the wires from the coil(s) to the individual plugs. Assuming you've doublechecked to be sure these didn't somehow get routed to the wrong plugs (ask me how know), try swapping the wires, disconnecting them from the coils and plugs and connecting them to another (appropriate) coil and another (appropriate) plug and see if that same plug doesn't fire or if another plug becomes the one that doesn't fire. Assuming nothing changes, I think you've eliminated the Lightspeed as the cause and we can start just diagnosing the only three things it can be from there forward : spark, fuel, or air, and we might be able to eliminate spark. On 6/24/2013 1:49 PM, brunk wrote: > > This is the original coax cable . I do not know the number of it. Would it cause the symptoms I described? Was that your problem it corrected? > > --------. dd > Robert E. Brunkenhoefer > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=403333#403333 > > ________________________________ Message 9 _____________________________________ Time: 04:04:22 PM PST US Subject: Re: RV-List: Re: lightspeed ignition troubleshooting From: Scott Bilinski The RG 58 is black. I had a strange intermittent miss when turning off one ignition. One thing to remember is RG 58 was designed for WWII aircraft. RG 400 is MODERN! RG 58 is NOT designed to handle under cowl temps. Especially the center conductor insulation. Sent from my iPhone On Jun 24, 2013, at 11:49 AM, "brunk" wrote: > > This is the original coax cable . I do not know the number of it. Would it cause the symptoms I described? Was that your problem it corrected? > > -------- > Robert E. Brunkenhoefer > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=403333#403333 > > > > > > > > > > ________________________________ Message 10 ____________________________________ Time: 04:16:40 PM PST US From: Vincent Himsl Subject: RV-List: RE: LightSpeed ignition troubleshooting Hi, 250 RPM drop compared to what read by what at what RPM setting? Run up implies 17 to 18 hundred rpm. Are you using the digital or analog rpm signal from the LightSpeed? CHT temps should drop, at least they do for me, when a cylinder is not firing. But yours are 'normal'. Do you hear/feel the RPM drop or is your only indication an instrument RPM reading drop? Your tachometer could be missing pulses (if digital) from the LIghtSpeed, and your tachometer is a...? Thanks, VinceH RV8 Flying On Jun 24, 2013, at 9:16 AM, Robert Brunkenhoefer wrote: > I have been trying to troubleshoot a drop of 250 rpm on run up on my > light speed side. I usually get 0 drop. I also show a 250 degree rise > above the other cylinders in the 3 and 4 egt. Cht is normal for all. I > have done all the troubleshooting in the manual supplied by Klaus. We > have spoken a lot about this problem. I would like to fly my plane > somewhere nearby to someone who is familiar withs these units so I can > get back to the perfect way it was for 5000 plus hours. thanks. I am > based at KCRP, corpus christi , texas. Robert Brunkenhoefer N661G 600 > hours plus ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv-list Browse Digests http://www.matronics.com/digest/rv-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.