Low RPM miss.

[Sniper]

Black and satin is too rich.

 

Black and glossy is oil burning.

 

9 hours ago, Ivan_B said:

You sure did, and not so long ago, too:

 

Dude, that was three and a half years ago.  Past Sniper is kicking Now Sniper's butt.  Future Sniper is in trouble, lol.

[Hickory]

What does that mean, did the plugs change dramatically between two different checks or was that an assumption from pulling them a month ago. Ashy could be from fuel additives or oil that has got real hot lately ory though, could it be coolant. I would check into the coolant one since it does it more the warmer it gets. If you have a leak down tester use it to pressurize cylinders and check for bubbles in coolant. If not you can use compression gauge check cylinder pressure, you can also adapt compression gauge hose to shop air. You can pressurize the coolant and see if coolant gets into cylinders. Many way to do this. You can also use combustion gas kit on radiator. But all test should be done hot.

[OUTFXD]

It was an assumtion / To lazy to pull the plugs and look. While I was out doing other chores I decided to pull the plugs and see if I was right.  I wasnt.  Being man enough to admit when I'm wrong I edited the post.

 

I dont have a leak down  tester,  but I will ask around.

[Hickory]

How about a coolant pressure tester

[greg g]

Is the step up valve functioning properly? Should be closed at high vacuum situations like idle.  If open it will cause fuel fouling.

[Booger]

All right class! quiet down! (clap clap) your homework is to watch Mikes carbs Carter B&B tutorals on You Tube. Everyone should have a clear understanding how the B&Bs work

[OUTFXD]

2 hours ago, greg g said:

Is the step up valve functioning properly? Should be closed at high vacuum situations like idle.  If open it will cause fuel fouling.

It moves freely on a light spring,  That much I know,  I have never CHECKED that its working...

 

[Ivan_B]

45 minutes ago, Booger said:

All right class! quiet down! (clap clap) your homework is to watch Mikes carbs Carter B&B tutorals on You Tube.

Yes, and make sure not to loose any balls, put things on the right way the first time, and use correct tools (no hammer no epoxy) ?

[OUTFXD]

On 8/23/2023 at 10:20 AM, Ivan_B said:

(no hammer

AWWwwwWW

 

[OUTFXD]

The more I think about it, the more that Dwell makes sense,  sadly know one I know has a dwell meter and the local shops want a kings ransom.  I ended up ordering a vintage one (they claim it works)  off Ebay.  Supposed to be here between Monday and Wednesday.  Ill keep you posted.

.

Edited August 27, 2023 by OUTFXD

[Ivan_B]

You know, this is probably not your case but I've recently encountered some issues on acceleration, after fixing my leaking carb (and replacing the air filter). The car would stumble up the hill in 2nd. I spent hours thinking what have I done different since the last time it was running fine, but could not identify the issue. Luckily, I noticed that a crimped cable between the coil and the distributor had a somewhat loose contact at the connector. Soldered the crimp together (the way it should be done - problem solved. So, you might want to check all your ignition-related wiring ?

[OUTFXD]

my spark plug wires  do need replacing and are on my list,  But keeps getting kicked down the priority list.  Thanks for the heads up!

[OUTFXD]

Dwell meter came in.  Gave it a run out and it read 65 degrees. 

 

Pulled the distributor out.  Turns out the Points had closed up... alot. 

 

adjusted points to 0.20,  Put her back together, Reset the timing,  adjusted air fuel mixture.  She reacted well to adjustments,

 

Checked the dwell.  Down to 25 degrees,  running great!

 

[maok]

The dwell reading should be around 38 degrees, keep adjusting the gap.

[OUTFXD]

6 hours ago, maok said:

The dwell reading should be around 38 degrees, keep adjusting the gap.

Right you are!  i had to go back and check my service manual.  For some reason I thought it was 24.5 to 28 degrees

[DJK]

10 hours ago, OUTFXD said:

Dwell meter came in.  Gave it a run out and it read 65 degrees. 

 

Pulled the distributor out.  Turns out the Points had closed up... alot. 

 

adjusted points to 0.20,  Put her back together, Reset the timing,  adjusted air fuel mixture.  She reacted well to adjustments,

 

Checked the dwell.  Down to 25 degrees,  running great!

 

Also remember to lube the points rubbing block with proper grease. Great that you found the problem.