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I need help diagnosing what's wrong with my engine
#21
I'll finally have some time this weekend to look at this.  I've borrowed a timing light, so I should be able to at least make sure the timing is right (gonna need to watch some videos!)

I don't have the original distributor any longer, so if I were to go the pertronix II route, I'd need to buy one of those.  I'm leaning towards another HEI style from Scott Drake (only $100) or maybe an MSD setup?  I really have no clue.
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#22
Scott Drake products have a poor reputation on our site. A stock distributor with a Pertronix 2 module should be reliable. Another reliable option is a DuraSpark 2 distributor and box, parts are available at most auto parts store if it should ever fail.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#23
(07-26-2019, 02:09 PM)Don C Wrote: Scott Drake products have a poor reputation on our site. A stock distributor with a Pertronix 2 module should be reliable. Another reliable option is a DuraSpark 2 distributor and box, parts are available at most auto parts store if it should ever fail.

Ok, great to know.  I was only going off of reviews from the CJ Pony Parts site.  I'll do some research on the duraspark upgrade.  that sounds pretty interesting
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#24
There have been a lot of discussions about DuraSpark on the forum, here's a couple of examples, you can search the forum for more
https://www.7173mustangs.com/thread-electronic-ignition
https://www.7173mustangs.com/thread-anot...ion--33764



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#25
(07-26-2019, 05:51 PM)Don C Wrote: There have been a lot of discussions about DuraSpark on the forum, here's a couple of examples, you can search the forum for more
https://www.7173mustangs.com/thread-electronic-ignition
https://www.7173mustangs.com/thread-anot...ion--33764

So I'm fairly confident that this distributor is dying.  I decided to again test spark to each cylinder, and 2 and 4 are not getting spark consistently (I didn't test the other side).  2 would spark 5-6 times when first starting up, and then would no longer spark.  4 would spark for a few seconds, completely stop for a few seconds, and repeat that cycle.

Thanks for the help so far.
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#26
After reading the threads you linked, and doing some more research, i'm guessing I'll need to either source a duraspark distributor / control module from a junkyard, or order those directly through ford.  Seems like there are several coils that are compatible.  I'll probably want to replace my wires and plugs too, i'm guessing.  Does that all sound right?

I'm going to shoot to get one from a pre-EFI foxbody mustang.
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#27
You can get a new distributor from RockAuto for $56, rebuilt for less
https://www.rockauto.com/en/catalog/ford...butor,7108
And a blue grommet box for $34
https://www.rockauto.com/en/catalog/ford...(icm),7172

Most local parts stores should also be able to get them.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#28
(04-29-2019, 10:16 AM)aasukisuki Wrote:
73Pony Wrote:When you pulled and set gap on the plugs what did the #8 plug look like? Were any of them black and oily?


These are the plugs from 1 & 2, but I don't remember any of the additional plugs looking much different than these. I can pull 8 again tonight to be sure:

[Image: oVpXlJVl.jpg]
[Image: pqIZ6ZAl.jpg]
[Image: MODXMh9l.jpg]


Not being an expert and as Fabrice has mentioned, these plugs look like its running too rich. Here is a little guide that talks about looking at a plug:


Attached Files
.jpg   sparkplug_details.jpg (Size: 43.03 KB / Downloads: 51)
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#29
If you are getting miss fires the plugs would look a little black due to excess un burnt fuel.
When you get all your new stuff also include a tube of the the electrical grease. You can get at your local parts store usually on the same rack as the RTV. Permatex is one mfg. Ford also carries it. Put the grease on all connections, put around the boot for the plugs also prevents arch outs and keeps the water out also. I also use anti seize on my spark plug threads so they do not lock in place. You can get that at parts house also. Does not take much just makes it easier to remove them next time. Use on any bolts that tend to lock up like on exhaust headers or header to exhaust pipe clamps. Good for the thermostat housing bolts also. Do not use inside the engine ever.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
[+] 1 user Likes Carolina_Mountain_Mustangs's post
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#30
(07-28-2019, 09:37 PM)Don C Wrote: You can get a new distributor from RockAuto for $56, rebuilt for less
https://www.rockauto.com/en/catalog/ford...butor,7108
And a blue grommet box for $34
https://www.rockauto.com/en/catalog/ford...(icm),7172

Most local parts stores should also be able to get them.

Man, thanks so much for your help.  So I need to order the
Cardone 842899 Distributor
Standard Motor Products LX203 Control Module

and I'll need a coil, since mine is long gone.  Something like this?
STANDARD MOTOR PRODUCTS FD476

finally, is it really worth spending the $125 on the conversion wire harness from NPD?
https://www.npdlink.com/product/conversi...the/144692
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