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djkeev
Samba Moderator
Joined: September 30, 2007
Posts: 32632
Location: Reading Pennsylvania
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tjet 
Samba Member
Joined: June 10, 2014
Posts: 3533
Location: CA & NM
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 Posted: Tue Jan 22, 2019 4:38 pm Post subject: Re: Number 3 is down ........ SOLVED |
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| RGS Paul wrote: |
That's exactly the setup I was running. I'm not overly impressed with the STI wires, they are loose on the plugs for one. Ordered new Bosch ones from GoWesty last night and informed Van Cafe of the failure.
Paul |
Paul, did you remove the screw-on ends from the spark plugs which exposes the threaded stud? Those wires I linked above require that. Mine are very snug with the reassuring clicking when you push on the wires. |
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RGS Paul
Samba Member
Joined: April 20, 2007
Posts: 663
Location: Los Alamos, NM
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| Posted: Tue Jan 22, 2019 6:36 pm Post subject: Re: Number 3 is down ........ SOLVED |
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| tjet wrote: |
Paul, did you remove the screw-on ends from the spark plugs which exposes the threaded stud? Those wires I linked above require that. Mine are very snug with the reassuring clicking when you push on the wires. |
Yup, didn't miss that step. The Bosch wires also required removal of that cap so I have gotten used to removing them over the last decade.
I might have been a little harsh on the STI wires. Looking at them again 'loose' isn't the right term, they have about 5° of end play if you try to move the wire while connected to the plug. In comparison the Bosch one is around 1°. However, since the Bosch ones are NLA we gotta look for options somewhere, these are a wear item after all. Credit is due to Van Cafe, Mike offered to send me a replacement set immediately when I notified them one died.
Thanks again to theSamba for helping triage the problem.
Paul
_________________
'87 Syncro 7-Pass. Adventure Touring Vehicle
"Simplicate, then add lightness." Colin Chapman |
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BavarianWrench
Samba Member
Joined: January 18, 2004
Posts: 1045
Location: Oceans Edge
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| Posted: Tue Jan 22, 2019 7:30 pm Post subject: Re: Number 3 is down |
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Props to Mark. His post should be a stand alone Sticky! If you're new to the game, or not, that is the quickest way to walk down a misfire. In this situation it was pretty clearly not a vacuum leak, probably why he didn't mention it. I always check for a vacuum leak, then follow the program Mark laid out. If that doesn't get it done, you're going into the leak down test. So glad it was just a crappy wire. On the mention of the ends on the spark plug, I hate it when I space out screwing off the ends until all the plugs are in and I'm trying to install the wires!
| MarkWard wrote: |
A couple tips. When confronted with a cylinder miss that can be pinpointed to a particular cylinder, here are 4 easy tests. Swap the plug wires at the distributor and the plug. If no improvent, swap the spark plugs. No improvement, Swap the injector connectors and last, swap the injectors themselves. Assuming the engine has enough compression to ignite the fuel charge, one of the above tests should move the misfire. If the miss does move when you are testing, it will give you an idea of the cause.
This is often quicker and less expensive than just trying new parts. |
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SyncroButter
Samba Member
Joined: February 02, 2016
Posts: 383
Location: Seattle
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| Posted: Wed Jan 23, 2019 11:09 am Post subject: Re: Number 3 is down ........ SOLVED |
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I love it when a plan comes together, +1 on props to Mark!
_________________
Grant
In the stable: 1986 Syncro Westfalia/Bostig, 1989 Doka Tristar, 1974 Vespa Rally 200, 1973 Vespa Primavera 125, 1963 Solex 2200, 1938 Buick Special
Gone but not forgotten: 1989 Porsche 944, 1973 Standard Beetle |
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