Un plugged

Well if you are not blowing blue smoke out the tail pipe, cannot smell oil

and never need to add oil then it is carbon fouled it would seem.

  On 10/21/2023 at 4:41 AM, gundee said:

Well if you are not blowing blue smoke out the tail pipe, cannot smell oil

and never need to add oil then it is carbon fouled it would seem.

Its correct. No blue smoke.

  On 10/21/2023 at 4:41 PM, jalexquijano said:

Its correct. No blue smoke.

Then we still need a photo of your ignition wiring as recently I posted.

Coil and resistor (if used) and which Pertronix you purchased. A couple different ones.

When i hear the word: Pertronix...  I get silent..  because i have said it many times..  (most times junk) 🤮

He is what I think I would do:

I love the idea of shipping the carbs and intake states side and have them fully sorted and tuned! Maybe somebody like Zcargarage. preferably using a wideband to tune them. They come back ready to bolt on. That will eliminate fueling as a possibility once and for all. That shouldn't be cost prohibitive

Secondly I would ditch the pertronix and the coil! Either buy a 280zx match box dizzy (would be used so might be worn out) and a new coil or ideally buy a 123 dizzy and the appropriate coil. This would be an upgrade from what you have and is also more tunable if needed.

Run that for a little while. If the problem's solved then great; if not I would probably pull the engine and re-ring it and go through the head provided the cross hatching looks good.

Edit:

One of the few things we haven't touched in this whole episode is the Pertronix

Edited October 22, 20231 yr by Patcon

I had the first version they put out, was very pleased with it, the newest version is more versatile.

https://123ignition.com/products/?filter_brand=datsun&filter_cylinders=6

Okay. Ill start today with the dry compression test. Can you point out which of the plugs must be removed from the ballast resistor before cranking the engine? 

Just remove the coil plug wire that goes to the top of the distributor cap

  On 10/22/2023 at 5:31 PM, jalexquijano said:

Okay. Ill start today with the dry compression test. Can you point out which of the plugs must be removed from the ballast resistor before cranking the engine? 

Where did you put that red wire from the Pertronix ignitor from the distributor? I don't see it where it is supposed to be.

Who installed that set up?

Edited October 22, 20231 yr by gundee

  On 10/22/2023 at 8:07 PM, gundee said:

Where did you put that red wire from the Pertronix ignitor from the distributor? I don't see it where it is supposed to be.

Who installed that set up?

Thats not my car. Its an example.

  On 10/21/2023 at 1:12 AM, siteunseen said:

I'd leave brand new plugs out for compression test. Motor turns freely but the test fitting will build psi. Do all six the same test procedure. No variant possibility.  All the same. Stay focused.

Please find attached the results of the dry compression test with gas pedal floored and choke pulled all the way back. Im also including pics of the pertronix ignitor module as reference.