Dead Cylinder #5 - Causes?
Thread Starter
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Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
94k on the odometer, probably 100k actual due to larger tires. Nothing's been done to the engine except ICP sensor before I got it, turbo upgrade, and the injector I just did. I know it has some weak injectors because it cold starts terrible, so I think the slightly-thinner-when-hot synthetic oil is just making them show up more.
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
The dino and syn shouldn't be any different weight hot as they are both 40w. It's just cold that they are different. FWIW--my truck never liked synthetic oil, which is why I always ran motorcraft 15w40 and my HPO is fine.
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Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
Mine really liked the synthetic until the weak injectors were revealed. Ran better, turbo spooled better, sounded smoother... overall positive until the miss started. I'm sure those injectors were on their way out anyway, so probably mostly a coincidence. I have seen from oil analysis results that the Valvoline synthetic tends to be a little lighter viscosity than other oils.
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
Has anyone come up with a connector that lets you tap into the circuit (like a male / female connector) and then put the output on a scope and see what the circuit is seeing?
That is another of my little projects...
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Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
When I tap into plugs like this I usually use a thin strand from a multi-strand wire to run into the contact and then hook the scope probes to that. It's tedious, but I'd rather do that then compromise the insulation to tap the wire.
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
My concept is to plug the adapter (with a M/F at end) that goes right in between, so no insulation have to be damaged.
Safer than using individual wires that can fall out.
Thread Starter
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Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
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Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
What I need are high res photos of the markings on the connectors.
That, plus a ruler beside them for scale.
They are made by very few firms --- and with the markings, I can normally ID them pretty quick.
Almost all the auto-grade connectors are made by US based industrial / commercial grade supplies unless the device is from Europe.
Believe it or not, they are not that easy to make - and auto manufacturers have to be assured that the maker will be in business 10 years down the road from the last order.
Very few suppliers from Asia.
Priority is on the common connectors used for a range of devices / sensors and key to vehicle operations / diagnostics.
e.g.
Sensors (every one of them)
PCM / FICM / etc. connectors
Alternator plug
(please add more).
If someone can start a new thread, post the pics, I will be glad to do the work of IDing and sourcing them.
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