Misfire, where do i go from here. (Page 4/18)
Patrick FEB 16, 11:05 PM

quote
Originally posted by Dukesterpro:

The pickup coil nylon wrap is rotted and looks rusty inside. Found the brown little tach filter inside the distributor housing was rusty and burst.

Installed new coil and for some reason grounded the lead for the tach filter introducing a direct short across the coil, melted the coil passthrough terminal so the ICM is not getting any voltage. Sigh, not one of my finest moments.



Let's see some photos!
Dukesterpro FEB 17, 10:58 AM
Its in my trunk right now I will pull it out when i get home.


In the mean time, what is this thing. I thought it was a tach filter. But someone's telling me its not.



New distributors in, and here is where I am at.

* Still reverse high idling. No High Idle at cold, progressively faster with heat.
*Smooth Tach when cold and low rpm, gets bouncier with heat and revving about 3000
*Stumble when heavy load on engine. (Eg half throttle in 4th gear at 35mph).


Could this be a injector problem? Still looking for ideas. I am still looking for a scanner.

[This message has been edited by Dukesterpro (edited 02-17-2023).]

Patrick FEB 17, 12:29 PM

quote
Originally posted by Dukesterpro:

I am still looking for a scanner.



...and a timing light.
Dukesterpro FEB 17, 12:31 PM

quote
Originally posted by Patrick:

...and a timing light.



And one of those lol
Dukesterpro FEB 17, 12:32 PM
Is that indeed a tach filter or am I crazy?
Patrick FEB 17, 01:10 PM

quote
Originally posted by Dukesterpro:

Is that indeed a tach filter or am I crazy?



I'm in no position to evaluate your sanity... but that doesn't look like any tach filter that I'm familiar with. An article Here on them.
Dukesterpro FEB 17, 01:27 PM
]I can't even Identify it by its part number, its like it doesn't exist. Not even in old (1985-86) components catalogs at work.

It comes off of the black and purple wire than leads from the coil to the ICM + pin. that wire seemed to have connected to the high side of whatever the heck that thing is, and then grounds out to the body of the distributor. I genuinely have no idea what the h-e double hockey sticks it is



it goes right there and ties into the little mounting screw for the plug that exits the distributor.
What. Are. You

[This message has been edited by Dukesterpro (edited 02-17-2023).]

82-T/A [At Work] FEB 17, 01:46 PM

quote
Originally posted by Dukesterpro:

]I can't even Identify it by its part number, its like it doesn't exist. Not even in old (1985-86) components catalogs at work.

It comes off of the black and purple wire than leads from the coil to the ICM + pin. that wire seemed to have connected to the high side of whatever the heck that thing is, and then grounds out to the body of the distributor. I genuinely have no idea what the h-e double hockey sticks it is



it goes right there and ties into the little mounting screw for the plug that exits the distributor.
What. Are. You





Again, I might be talking out of my ass here since it's been a while, but generally there are only two things in our style of distributors... the PICKUP COIL, which requires you to disassemble the distributor to replace (and can cause misfires), and the ignition control module. ALSO, in some distributors, there's also a condenser, which is supposed to... I guess reduce the interference coming from the electrical activity and provide a more accurate / less distorted tach signal to the ECM for timing and adjustment. These do go bad also...
Dukesterpro FEB 17, 02:32 PM



Condensers It is infact wired like one.

I wonder if they sell them?
82-T/A [At Work] FEB 17, 02:47 PM

quote
Originally posted by Dukesterpro:

Condensers It is infact wired like one.

I wonder if they sell them?




Is yours a 1984? I couldn't remember if you said this anywhere (didn't immediately see it above).

It appears as though the 1984 distributor is totally different than the 85-86 one. The condensor appears to be mounted internally, with a completely different style of ignition control module, rather than the newer style, which has it mounted externally. For some reason, I cannot find it anywhere, you don't seem to offer this piece separately. Unless I'm just completely wrong, but I unfortunately do not have my 1984 anymore to go out and compare.

Can you take a picture of the part you took off? Or are you saying it's missing completely?