I'm glad you found it! I forgot to tell you to watch it running in the dark - I could see the arcing at night in mine.
When I worked at a foreign car shop, we had a sign up (this will date me) that said - Shop rate - $20/hr., $30/hr if you watch, $40/hr if you help. On Fri, Jan 25, 2013 at 8:22 PM, clay monroe <redgh...@comcast.net> wrote: > And what do you know, You win the prize > > Turned out that $1500 later the chase for the missing miss ended up being > the new wires I installed from Q. Bosch wires with quality issues that > after a few hundred miles gave up the ghost. Boots were not attached well > to the wires and began arcing. This is the miss. > > Chased injectors, compression, new plugs, and since the wires are new, > just assumed that was crossed off the list. Looked at vacuum lines, > distributor, condensers, contemplated a new K-jet computer and wire > harness, chased the fuel lines. > > Last thing, after lots of head scratching was to do it all over. Got to > the wires and when there was no change to the miss, he got a bug up his > bonnet, and decided to see if #5 wire could be swapped with #6 and it > worked. Pulled the rest of the wires and found a few more that had the > arcing issue. Kept the five good ones and tossed known good used to make > it all good once again. > > Indy has now threatened me with double rates if I do any work and bring it > to his shop. > > clay > > > 1974 450sl - Frosch - Two tone green > 1972 220D - Gump - She is green, simple and ran > 1995 E300D - Cleo - Used by the Queen of Denial > POS 1987 SDL - Beware Nigerian Scammers > > > > > > > > On Jan 24, 2013, at 8:25 PM, OK Don wrote: > > > OK - I've forgotten what model/year Frosch is. However, I had to replace > > the plug wires to cure random missing in the '78 450SLC. A new set from Q > > made a world of difference. Of course, this only works if the fuel > > injection system is working fine :-) > > The all iron 117 engine is almost indestructable. Don't rebuild unless > you > > have more reason then just missing. I rebuilt mine when it would no > longer > > start. I found that ALL the rubber in the intake system was dried, > cracked > > and leaking - and there's a LOT of rubber in that system. There's a web > of > > rubber tubing under the two piece intake manifold (that is joined by > rubber > > tubing) that you can't even see without pulling the intake manifold off. > > > > On Thu, Jan 24, 2013 at 8:41 PM, Rick Knoble <rickkno...@hotmail.com> > wrote: > > > >> On Jan 24, 2013, at 7:39 PM, "clay monroe" <redgh...@comcast.net> > wrote: > >> > >>> Questions for the group. > >>> > >>> Is it bad if I just drive the car anyway and save up for more work to > >> solve the mystery? > >> > >> > >> If the problem is a fuel injector not working at all, no. If it is an > >> ignition problem, maybe. A cylinder not firing will cause fuel to wash > down > >> that cylinder and contaminate the oil in the crankcase. It is probably > best > >> not to drive it. > >> > >>> Rebuild the engine to put it back into spec? > >> > >> If the compression is okay, there are no massive oil leaks, and no odd > >> internal engine noises why bother? Do you have that much extra coin > laying > >> around AND a wife that will let you spend it? I should be so lucky. > >> > >>> Drive it and save up to do a head gasket replacement at which time > >> everything would be clean and sealed up by fresh gaskets instead of the > 40 > >> year old stuff? > >> > >> Park it and have the Indy sort it out, if you feel over whelmed by it. I > >> am not familiar with Mercedes alloy V8's. If it is common for particular > >> head problems to arise on that engine, address those issues. If it is > >> pretty much bullet proof, leave it alone. > >> > >>> What other things could be causing a miss? > >> > >> A four stroke gasoline engine needs fuel, ignition, and compression to > >> run. Determine which is lacking, and correct it. I know, easier said > than > >> done. > >> > >> Does it miss at idle? Only under load? What are the conditions that > cause > >> the miss fire? A shop with an old Sun machine could help here. The old > >> oscilloscopes were great for troubleshooting points ignition problems. I > >> still remember a few things about how to read one. What shows up as > point > >> bounce, bad wires, etc. > >> > >> My WAG as to your problem would be a heat related deterioration of the > >> injection wiring. That is a WAG, as I know nothing of Mercedes V8's. > >> > >> Rick > >> Who feels old now. > >> Sent from my iPhone > >> > >> _______________________________________ > >> http://www.okiebenz.com > >> For new and used parts go to 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 > >> > > > > > > > > -- > > OK Don > > 2001 ML320 > > 2012 Passat TDI DSG > > 1997 Plymouth Grand Voyager > > 1957 C182A > > _______________________________________ > > http://www.okiebenz.com > > For new and used parts go to 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 > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to 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 > -- OK Don 2001 ML320 2012 Passat TDI DSG 1997 Plymouth Grand Voyager 1957 C182A _______________________________________ http://www.okiebenz.com For new and used parts go to 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
