Misfire, where do i go from here. (Page 5/18)
Dukesterpro FEB 17, 02:50 PM

quote
Originally posted by 82-T/A [At Work]:
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?




I do have a 1984 and that little red piece up above is the piece.

Im starting to dig up old forum posts, It looks like I might be up a very specific creek without a paddle
Dukesterpro FEB 17, 02:52 PM
Yes it is a 1984,

I have uncovered some old forum posts and it appears I am up a specific creek without a paddle.

I literally just bought this 84 dizzy. I wonder what could be done now.
PhatMax FEB 17, 03:51 PM
Do have any other angles of the part in the pic ?



quote
Originally posted by Dukesterpro:

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.
Dukesterpro FEB 17, 04:20 PM

quote
Originally posted by PhatMax:

Do have any other angles of the part in the pic ?





Just that, the sides of the cap were burst and leaking. That was the only label on it
Patrick FEB 17, 09:01 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.



Because that's probably an aftermarket distributor... possibly by Cardone. It's been about 20 years since I looked on the inside of a 2.5 distributor, so I can't be 100% sure.

The reason I think it may be aftermarket... look at these 2.8 distributors. Factory on left, aftermarket on right.



[EDIT] It could be that unlike the 2.8's, the duke's distributors always had the later style. See below.

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

82-T/A [At Work] FEB 17, 11:02 PM

quote
Originally posted by Dukesterpro:

Just that, the sides of the cap were burst and leaking. That was the only label on it




Ok, this definitely has to be your problem... the engine will definitely run like crap with this messed up... because it literally cannot handle timing adjustments.

They do sell remanufactured distributors, with the new condensors in them. Check Rock Auto... I also saw some on Summit Racing when I was searching for a picture of it for you.
Patrick, the picture you're posting is the difference between the old style and the new style of distributor. I wouldn't say the new one is "aftermarket" per-se, but it's actually GM's replacement for that older style. They just realized that it was a better design, so they don't even rebuild those old ones like that anymore from what I understand... you have to really search for those old ones.
Patrick FEB 17, 11:15 PM

quote
Originally posted by 82-T/A [At Work]:

Patrick, the picture you're posting is the difference between the old style and the new style of distributor. I wouldn't say the new one is "aftermarket" per-se, but it's actually GM's replacement for that older style.



So you're saying that when Pontiac was still around, that they would've have Delco Remy distributors on the shelf that looked like the style of the Cardone units?

[EDIT] Visions of the inside of my duke's distributor are beginning to creep back into my consciousness. It appears the guts look like what I thought were "aftermarket" distributors for the duke. Only one way for me to sort this out. If it's not raining tomorrow, I'll pull the distributor cap and rotor off the duke in my parts car and have a look under there!

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

82-T/A [At Work] FEB 18, 10:34 PM

quote
Originally posted by Patrick:

So you're saying that when Pontiac was still around, that they would've have Delco Remy distributors on the shelf that looked like the style of the Cardone units?




Yeah, it wasn't just Cardone... pretty much all the distributor manufacturers went to this new design. The AC Delco replacement distributor had this new design as well. It was significantly improved over the older style that the Fiero originally came with. The shaft, base, etc... is all still the same, they just upgraded that one piece. You can still find rebuilt versions of the original if you really wanted it, but almost everyone, including AC Delco is using the newer pickup design.

This image is actually from my website: https://www.pontiacperforma...es/Dist_Upgrade.html

Of course, I stole that picture originally too, haha... but I used MS Paint back in like 2008 to put OLD and NEW on it.


EDIT: Yeah, here you go... this is a remanufactured one from AC Delco: https://www.rockauto.com/en...einfo.php?pk=3863712

[This message has been edited by 82-T/A [At Work] (edited 02-18-2023).]

Patrick FEB 19, 04:54 PM

quote
Originally posted by 82-T/A [At Work]:

EDIT: Yeah, here you go... this is a remanufactured one from AC Delco



That's for a 2.8 V6. Find one for a duke.
82-T/A [At Work] FEB 19, 08:16 PM

quote
Originally posted by Patrick:

That's for a 2.8 V6. Find one for a duke.




Here you go, AC Delco, with the newer style of rotor: https://www.rockauto.com/en...einfo.php?pk=3863619




I only mentioned the V6 simply because you were bringing it up here:


quote
Originally posted by Patrick:

The reason I think it may be aftermarket... look at these 2.8 distributors. Factory on left, aftermarket on right.





This replacement from Rock Auto is $114, but it has everything, including the condenser. If he needs or is planning on getting a new one, you'll definitely want the newer style, it's significantly better than the older style with the tabs. Later GM-style distributors went with this style of pickup, and is why they switched.