12-25-2023, 01:15 AM | #121 | |
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Re: 47 V8 ignition mystery
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In fact they are all worse than they use to be. Larry |
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12-25-2023, 03:07 AM | #122 |
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Re: 47 V8 ignition mystery
I,m going to male a set for my 33, 6v, Im going to use a modern 7mm set that have a tough fibre core covered by a carbon impregnated sleave,, I have tried them on the test bench and they seem fine.
I got them from summit. Lawrie |
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12-26-2023, 12:12 AM | #123 | |
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Re: 47 V8 ignition mystery
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12-27-2023, 09:43 PM | #124 | ||
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Re: 47 V8 ignition mystery
I know, I know, I hate this never ending story as much as anyone but I have just got to solve this mystery or die trying so I still need your help.
At least another clue has manifested itself: Quote:
Quote:
Any ideas?
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12-27-2023, 10:02 PM | #125 |
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Re: 47 V8 ignition mystery
Shot in the dark....Water spray from leaky water pump...
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12-27-2023, 10:52 PM | #126 |
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Re: 47 V8 ignition mystery
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12-28-2023, 12:22 AM | #127 |
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Re: 47 V8 ignition mystery
In my '47, I was having trouble making a good connection of the rotor to the cap. The gasket you are referring to, between the cap and distributor body, was in bad shape. It caused the cap to sit ever so slightly off on the body. I ordered a new one but, while I waited for it to arrive, I just removed the old gasket, reinstalled the cap and it solved the problem. I understand that the gasket is only there to keep water from getting in the distributor. I believe that now.
Phil |
12-28-2023, 12:48 AM | #128 | |
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Re: 47 V8 ignition mystery
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I'm afraid to run without the gasket for two reasons: 1) I'm afraid the rotor end will be too high and hit the cap terminals. 2) I go through some pretty wet storms on my road trips and would hate to get any water in the cap.
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12-28-2023, 01:12 AM | #129 |
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Re: 47 V8 ignition mystery
If you want the correct brown wires they all from all vendors come from the same source. I recently installed a set on a 48 I feel your pain as it’s not all that easy but even though the surface convering is prone to cracking it has not presented me personally with a functionality issue
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12-31-2023, 07:07 PM | #130 | |
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Re: 47 V8 ignition mystery
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Where do I get what I need for this - the cap, the rotor, the clips and whatever else I'll need? Will the wires I now have be long enough for diagnostic operation?
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12-31-2023, 09:21 PM | #131 |
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Re: 47 V8 ignition mystery
Craig, you'll need the 21A distributor cap and rotor along with plug wires. Looks like Third Gen has all of that in stock. Not sure if the 46-48 spark plug conduits will work either. You may have to route the wires another way or modify the conduits if you elect that route as a permanent solution. Believe the 42 wires are color coded. The clips would be shorter too, Michael may have them also.
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12-31-2023, 10:31 PM | #132 | |
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Re: 47 V8 ignition mystery
Quote:
This will be for diagnostic only. I won't run through the conduits. When I have 9 known good wires I'll then thread them through the conduits, boots, and upper cap into the lower cap and hope it works as well.
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01-07-2024, 11:08 PM | #133 |
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Re: 47 V8 ignition mystery
Ok. I tossed the spark plug conduits and two part rabbit ears cap and installed a new crab cap and rotor then plugged the wires I've been using (that were suspect at one time) into the crab cap and onto the plugs. Worked great for 9 miles then the old skipping returned. I thought maybe it was because I didn't put boots/nipples on the wires where they were plugged into the distributor cap and was driving through a blinding blizzard and water was getting in and shorting. So, I left it overnight to dry good and took it out again tonight. Immediately cylinders were misfiring. Came back to the garage, put my timing light on each wire and it was the same old pattern - # 6 skipping the most, #3 next and #7 & 8 a little. So I swapped the #2 and #6 wires that are both the same length and fired it up expecting the problem to move with the wire to #2. It did not. It stayed with #6. Just in case it was the #6 sparkplug, I pulled the wire from the plug and held it near a head bolt. The skipping was coming out of the wire end - so, it's not the spark plug.
What is it?
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01-07-2024, 11:38 PM | #134 |
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Re: 47 V8 ignition mystery
You have done everything except swap the distributor, at least I think so. Too many pages to go back and check, but it seems to me the whole ignition system needs work.
Starting with the distributor. It is a long time since I have had a problem this vexing, but when I have had it has always been " the assumption, the overlooked or the misunderstood". Guilty of them all your Honour. |
01-08-2024, 12:54 AM | #135 |
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Re: 47 V8 ignition mystery
So, we complete the full circle back to where I began over two months ago with my routine 10,000 maintenance replacement of the spark plugs and contact points in my distributor. The peaks on the cam were too worn down to properly set the gap on the points so I bought a Ford Authorized Remanufactured distributor from South Side Obsolete. It looked brand new but it was an older remanufacture so I installed new points and sent it to Michael at ThirdGen to check it out. He put it on his machine, adjusted the dwell and replaced the condenser and returned it to me. Just like every time I've ever tried something new, the engine ran perfect after installing that distributor . . . for a very short time. So, I bought new spark plug wires and installed them thinking my old ones must have been the problem. Again, the engine worked perfect . . . for a very short time before starting to misfire again. We suspected the coil so I removed the coil wire to the distributor, plugged in a short coil wire and put next to a head bolt - perfect. Never skipped a beat. I even replaced the coil but that made no difference. So, we went back to focusing on the new wires as being bad until tonight when I was able to switch good ones with suspected bad ones and the problem stayed with the cylinder, not the wire.
Is there anything that I haven't checked or done to the distributor that I have missed that I should do? I can't think of anything else. Please help.
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01-08-2024, 06:49 AM | #136 |
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Re: 47 V8 ignition mystery
I am sorry, but I have reached limits of my experience on this.
Let's think it through. Normally problems with a cylinder dropping out can be associated with the HT side of things. You have changed the cap and rotor and the problem still seems to be there. There can be problems with worn bushings in the distributor that can lead to a miss on one cylinder, but I have only witnessed this on a 4 cylinder with single points (not Ford). The only thing I am not too sure about is the mention of a blizzard and also more cylinders not firing properly. Leaving it until next morning probably wouldn't allow it to dry out properly. I don't really have anything I can suggest, you have tried most things. Do you know anyone nearby that would be able to loan you a complete distributor and coil off a known proven good running car? It could be that the problem lies with the carb or a vacuum leak or something like that, and all the shenanigans with the distributor have been a red herring. I hope you can eventually get to the bottom of it and can post a positive result at some time. Mart. |
01-08-2024, 08:12 AM | #137 |
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Re: 47 V8 ignition mystery
Craig>>Again, the engine worked perfect . . . for a very short time before starting to misfire again.>>>>same old pattern - # 6 skipping the most, #3 next and #7 & 8 a little.>>>
Mart>>>It could be that the problem lies with the carb or a vacuum leak or something like that, and all the shenanigans with the distributor have been a red herring.>>> Firing order with emphasis on problem cylinders 1-5-4-8-6-3-7-2 |
01-08-2024, 09:34 AM | #138 | |
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Re: 47 V8 ignition mystery
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I recently had a vexing problem with my newly rebuilt distributor that just could not be solved. I purchased a new rebuild from Gen 3, bolted it on and off I went. PROBLEM SOLVED!!!. Good Luck |
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01-08-2024, 02:59 PM | #139 |
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Re: 47 V8 ignition mystery
In post 31 you mentioned a smashed plug.
This brings up some memories about a weird plug failure. Probably don't explain what you have but anyway; Once upon a time a i had a Simca 1100 special (4-cyl 1300cc engine) that had a weird ignition fault. It was running on 3 cylinders on and off. I checked which cylinder out by lifting spark plug wire one by one. The engine bogged down running on only two cylinders when lifting any of cyl 1 ,2 or no 3 wires. But when lifting cyl no 4 wire, a little, it suddenly fired up on all 4 cylinders! What?! It turned out to be a faulty sparkplug. My opinion over what happened: The plug must had some internal isolator fault that the normal high tension voltage flashed over. But when the plug wire was lifted a little, there was a flash in air from wire end to plug terminal. It takes some voltage to create this flash so the voltage stress on the plug decreases accodingly The high tension voltage is shared by this air spark in series with the plug gap/ isolator fault and apparently the voltage stress in the plug decreased so it jumped over plug gap as it should, and not over the isolator fault, and the engine ran fine. The isolator fault could have been an internal crack or a porcelain impurity. |
01-08-2024, 04:09 PM | #140 | |
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Re: 47 V8 ignition mystery
Quote:
What else could that pattern suggest?
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