Re: [MBZ] Misfires, dying
Jim wrote: The 560 SEL has been running worse and worse lately. Intermittently. Feels like a misfire at low RPM's, it's pretty much fine when revved up. It's back to dying at times when trying to start out. I believe I smell gas when it's acting up. I'm thinking bad connection in the ignition system. Somewhere. That covers a lot of ground, including the ignition switch, fuses, common ground points. Also a whole lot of the innards of things like the ignition module, coil, etc. (In April I put in new plugs and spark wires.) On my '72, I rigged an LED injector indicator in the cabin. One LED per injector channel. I was able to watch the injectors firing and when it misfired I was able to prove it was fuel not ignition. I hate gas cars. Heh - agreed! -- Philip ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] Misfires, dying
-- And also made a neat-looking display, I'd bet. ;) Wilton - Original Message - From: fmiser via Mercedes mercedes@okiebenz.com To: mercedes@okiebenz.com Sent: Friday, October 31, 2014 2:15 PM Subject: Re: [MBZ] Misfires, dying Jim wrote: The 560 SEL has been running worse and worse lately. Intermittently. Feels like a misfire at low RPM's, it's pretty much fine when revved up. It's back to dying at times when trying to start out. I believe I smell gas when it's acting up. I'm thinking bad connection in the ignition system. Somewhere. That covers a lot of ground, including the ignition switch, fuses, common ground points. Also a whole lot of the innards of things like the ignition module, coil, etc. (In April I put in new plugs and spark wires.) On my '72, I rigged an LED injector indicator in the cabin. One LED per injector channel. I was able to watch the injectors firing and when it misfired I was able to prove it was fuel not ignition. I hate gas cars. Heh - agreed! -- Philip ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
[MBZ] Misfires, dying
The 560 SEL has been running worse and worse lately. Intermittently. Feels like a misfire at low RPM's, it's pretty much fine when revved up. It's back to dying at times when trying to start out. I believe I smell gas when it's acting up. Frustrating, especially after just putting a transmission in it. Yesterday on the way home from work it completely cut out, at speed, twice. (That's new.) I was able to pull out of traffic on momentum and get it started again, then I made it home, with only the usual amount of pissy behavior, bucking and snorting. I'm thinking bad connection in the ignition system. Somewhere. That covers a lot of ground, including the ignition switch, fuses, common ground points. Also a whole lot of the innards of things like the ignition module, coil, etc. (In April I put in new plugs and spark wires.) I hate gas cars. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] Misfires, dying
Wiring harness insulation degrading? My '87 wagon suffers greatly from this. I've acquired a used engine wiring harness in decent shape, but unlike my '95 sedan, this wiring harness runs all over under the hood, connecting the EDS computer and other relays to components and connections at both ends of the firewall, in and under the fuse box, and down the inside of both fenders. Installation will be quite daunting. Max Dillon, Charleston SC On Oct 30, 2014 9:30 AM, Jim Cathey via Mercedes mercedes@okiebenz.com wrote: The 560 SEL has been running worse and worse lately. Intermittently. Feels like a misfire at low RPM's, it's pretty much fine when revved up. It's back to dying at times when trying to start out. I believe I smell gas when it's acting up. Frustrating, especially after just putting a transmission in it. Yesterday on the way home from work it completely cut out, at speed, twice. (That's new.) I was able to pull out of traffic on momentum and get it started again, then I made it home, with only the usual amount of pissy behavior, bucking and snorting. I'm thinking bad connection in the ignition system. Somewhere. That covers a lot of ground, including the ignition switch, fuses, common ground points. Also a whole lot of the innards of things like the ignition module, coil, etc. (In April I put in new plugs and spark wires.) I hate gas cars. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] Misfires, dying
On Thu, 30 Oct 2014 05:29:51 -0800 Jim Cathey via Mercedes mercedes@okiebenz.com wrote: I'm thinking bad connection in the ignition system. Somewhere. That covers a lot of ground, including the ignition switch, fuses, common ground points. Also a whole lot of the innards of things like the ignition module, coil, etc. (In April I put in new plugs and spark wires.) Run a wire from under the hood into the passenger compartment. Connect an LED with ballast resistor to the wire and to a ground (observing proper polarity, but then you know that). First connect the wire under the hood to the DC supply for the ignition module. Drive the car to see if the LED goes out when it's displaying symptoms. If it does go out, the problem is upstream of the DC supply to the ignition module. If it doesn't go out the problem is downstream of the DC supply to the ignition module. Move the wire's connection point as appropriate and if possible toward the problem. I hate gas cars. Sorry. Craig ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] Misfires, dying
Sort of like the list today. RB ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] Misfires, dying
Be careful, I may hafta throw in another B-52 tale. ;) Wilt - Original Message - From: Randy Bennell via Mercedes mercedes@okiebenz.com To: Craig diese...@pisquared.net; Mercedes Discussion List mercedes@okiebenz.com Sent: Thursday, October 30, 2014 3:48 PM Subject: Re: [MBZ] Misfires, dying Sort of like the list today. RB ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] Misfires, dying
Time for all new rubber in the air part of the fuel injection -- new idle control valve hoses, new boot for the fuel distributor, and new seals between manifold halves. Normal maintenace, alas. Also check to make sure the air flow metering flap is moving normally, the electrohydraulic control valve on the fuel distributor is not leaking, and that the ignition wires are not leaking huge amounts of current. Look for spiderweb burn marks were the coil wire and plug wires are close to metal, this means they are shot. Might need a new distributor cap as well, and getting leaks fixed if it has carbon tracks in it. Most likely a bad idle control valve hose or sticking idle control valve it if dies on deceleration -- the valve closes as it should but does not open fast enough to keep the idle from dropping to zero as the car slows down. And don't forget to check the fuel pumps -- there are two, and if either is going out, it will do everything you mention. Bad fuel pump relay can do the same thing, but usually as a result of a bad fuel pump drawing too much current. You can check the relay by jumpering around it temporarily -- if the car runs fine with a jumper instead of the relay, replace the relay and check the current draw on BOTH pumps. Peter ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
