---------------------------------------------------------- Continental-List Digest Archive --- Total Messages Posted Mon 09/15/08: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:50 AM - Re: Re: IO-520BB - Rough running at idle and low RPM (Daniel Michaels) 2. 10:15 AM - Re: Re: IO-520BB - Rough running at idle and low RPM (F. Tim Yoder) 3. 12:07 PM - Re: IO-520BB - Rough running at idle and low RPM (martymitchell) 4. 12:28 PM - Re: Re: IO-520BB - Rough running at idle and low RPM (William Archer) 5. 07:35 PM - Re: Re: IO-520BB - Rough running at idle and low RPM (Daniel Michaels) 6. 10:50 PM - Re: IO-520BB - Rough running at idle and low RPM (martymitchell) ________________________________ Message 1 _____________________________________ Time: 09:50:43 AM PST US From: Daniel Michaels Subject: Re: Continental-List: Re: IO-520BB - Rough running at idle and low RPM Call over to GAMI. - Dan --- On Sun, 9/14/08, martymitchell wrote: From: martymitchell Subject: Continental-List: Re: IO-520BB - Rough running at idle and low RPM Thanks Tim and Dan. Yes, it smooths out quite a bit when I lean it out (ab out two inches of throttle position) but still misfires. I did clean the injec tors with Hoppes #9 gun cleaner but no change. I'm not sure how to check for air leaks other than to verify tightness of all hose clamps and intake bolts. Also, how do you test injector flow? Do you remove them, then capture fuel thru each one into a cup simultaneously and compare levels? I have Gami's, so I would expect different levels in Front, Middle and Back positions. Do you use the boost pump for the test (can't use the engine driven pump)? I do have an engine monitor (EDM-700) and there's nothing too out of place at cruise, can't tell at idle as numbers tend to be all over the place. Thanks... -------- Marty Mitchell Bonanza N44GN Read this topic online here: http://forums.matronics.com/viewtopic.php?p 4292#204292 =0A=0A=0A ________________________________ Message 2 _____________________________________ Time: 10:15:44 AM PST US From: "F. Tim Yoder" Subject: Re: Continental-List: Re: IO-520BB - Rough running at idle and low RPM How does it run at mag check? Right mag. drop? Left Mag. drop? Mags checked with mixture rich or lean? What year, model Bonanza is it? Tim ----- Original Message ----- From: Daniel Michaels To: continental-list@matronics.com Sent: Monday, September 15, 2008 9:48 AM Subject: Re: Continental-List: Re: IO-520BB - Rough running at idle and low RPM Call over to GAMI. Dan --- On Sun, 9/14/08, martymitchell wrote: From: martymitchell Subject: Continental-List: Re: IO-520BB - Rough running at idle and low RPM To: continental-list@matronics.com Date: Sunday, September 14, 2008, 5:50 PM Thanks Tim and Dan. Yes, it smooths out quite a bit when I lean it out (about two inches of throttle position) but still misfires. I did clean the injectors with Hoppes #9 gun cleaner but no change. I'm not sure how to check for air leaks other than to verify tightness of all hose clamps and intake bolts. Also, how do you test injector flow? Do you remove them, then capture fuel thru each one into a cup simultaneously and compare levels? I have Gami's, so I would expect different levels in Front, Middle and Back positions. Do you use the boost pump for the test (can't use the engine driven pump)? I do have an engine monitor (EDM-700) and there's nothing too out of place at cruise, can't tell at idle as numbers tend to be all over the place. Thanks... -------- Marty Mitchell Bonanza N44GN Read this topic online here: http://forums.matronics.com/viewtopic.php?p 4292#204292 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D ________________________________ Message 3 _____________________________________ Time: 12:07:01 PM PST US Subject: Continental-List: Re: IO-520BB - Rough running at idle and low RPM From: "martymitchell" It runs rough on either mag. It's not bad at 1700 RPM, just at lower RPM's around 900-1100. Single mag operation drops around 75-100 rpm on either mag. Runs rougher with mixture full rich, better when leaned out quite a ways (2"). It's a 1976 F33A. -------- Marty Mitchell Bonanza N44GN Read this topic online here: http://forums.matronics.com/viewtopic.php?p 4430#204430 ________________________________ Message 4 _____________________________________ Time: 12:28:05 PM PST US From: "William Archer" Subject: Re: Continental-List: Re: IO-520BB - Rough running at idle and low RPM What is the carb history? How many rebuilds? How much time on this rebuild? With a worn mixture arm or needle jet/seat, your mixture control will induce a response but will always run rich. You'll only really notice it at idle. Just a guess. > > > It runs rough on either mag. It's not bad at 1700 RPM, just at lower RPM's > around 900-1100. Single mag operation drops around 75-100 rpm on either > mag. > > Runs rougher with mixture full rich, better when leaned out quite a ways > (2"). > > It's a 1976 F33A. > > -------- > Marty Mitchell > Bonanza N44GN > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p 4430#204430 > > ________________________________ Message 5 _____________________________________ Time: 07:35:29 PM PST US From: Daniel Michaels Subject: Re: Continental-List: Re: IO-520BB - Rough running at idle and low RPM Not a carb it is FI - This sounds more like flow, Check your flow control. - Dan --- On Mon, 9/15/08, William Archer wrote: From: William Archer Subject: Re: Continental-List: Re: IO-520BB - Rough running at idle and low RPM What is the carb history?- How many rebuilds?- How much time on this re build?- - With a worn mixture arm or needle jet/seat, your mixture control will-ind uce a response but will always run rich.- You'll only really notice it at idle.- Just a guess. - - It runs rough on either mag. -It's not bad at 1700 RPM, just at lower RPM 's around 900-1100. -Single mag operation drops around 75-100 rpm on eith er mag. Runs rougher with mixture full rich, better when leaned out quite a ways (2 "). It's a 1976 F33A. -------- Marty Mitchell Bonanza N44GN Read this topic online here: =0A=0A=0A ________________________________ Message 6 _____________________________________ Time: 10:50:41 PM PST US Subject: Continental-List: Re: IO-520BB - Rough running at idle and low RPM From: "martymitchell" Problem Found! I did a second compression check and took my time. Although all of the compressions are in the low to mid 60's, it appears that each cylinder has a valve leak, one exhaust and 5 intakes. I suppse that is why it idles so rough. Thank you all for your help and suggestions. I should have started off with a careful compression check. -------- Marty Mitchell Bonanza N44GN Read this topic online here: http://forums.matronics.com/viewtopic.php?p 4519#204519 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message continental-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Continental-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/continental-list Browse Digests http://www.matronics.com/digest/continental-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.