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post #541 of 844 Old 06-28-2013, 07:41 AM
fourbtgait
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Quote:
Originally Posted by 2Xtreme

After reading and re-reading, I THINK the plan is:
Keep timing where it is at 7*
Pull carb and adjust secondary throttle plates per our discussion above (pert' near closed)
Then set overall idle speed

God, I hope that's correct.....
You are.

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post #542 of 844 Old 06-28-2013, 08:03 AM
86cj74.2L
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How about just adjusting the idle down and not caring about the .020. I never did. Just left the secondary adjusted factory and slapped on carb. Started it adjusted the idle and set fuel screws.
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post #543 of 844 Old 06-28-2013, 08:08 AM Thread Starter
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Quote:
Originally Posted by 86cj74.2L View Post
How about just adjusting the idle down and not caring about the .020. I never did. Just left the secondary adjusted factory and slapped on carb. Started it adjusted the idle and set fuel screws.
That's how this whole thing started... lol
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post #544 of 844 Old 06-28-2013, 12:32 PM
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To me its impossible to set those holes to a generic setting of .020 with no regard for engine type or displacement and expect it to be within 100rpm of your target idle rpm.
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post #545 of 844 Old 06-29-2013, 10:03 AM Thread Starter
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Pulled the carb, flopped it over and adjusted the secondaries fully closed. Then opened them up 1.5 turns on the screw which just barely allows light to be visible around the plates.

Also double checked the primaries. Seemed like I had them set to a 'fat' .020",so I closed them a bit.

One thing I noticed when I pulled the carb was that the bottom of the primary plates were wet. Don't k ow if that indicates anything, but figured I'd mention It.

Started it up, and it idled at 1920,which is what Holley states.

HOWEVER....
The dang thing will not kick down off of high idle, no matter what I do....

Ugh...

Wheel, Fix, repeatů.
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post #546 of 844 Old 06-29-2013, 10:11 AM
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Choke fully opening when it warms up? Isn't that red (?) lever by the choke a manual kick-down? I haven't had a Holley in my hand in years.


Shawn

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post #547 of 844 Old 06-29-2013, 10:18 AM Thread Starter
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Quote:
Originally Posted by swatson454
Choke fully opening when it warms up? Isn't that red (?) lever by the choke a manual kick-down? I haven't had a Holley in my hand in years.

Shawn
The red lever is manual kickdown.

Now that you mention it, I don't the the choke was fully opened when warm.

Wheel, Fix, repeatů.
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post #548 of 844 Old 06-29-2013, 10:22 AM Thread Starter
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I'm thinking 86 may be on to something.

Maybe .020" on the primaries is too much for a relatively 'small' motor for this carb....

Thoughts?

Wheel, Fix, repeatů.
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post #549 of 844 Old 06-29-2013, 11:15 AM
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Quote:
Originally Posted by 2Xtreme View Post
I'm thinking 86 may be on to something.

Maybe .020" on the primaries is too much for a relatively 'small' motor for this carb....

Thoughts?
That's just a good starting point and something you do your best not to exceed. Less is fine as long as the slots don't disappear or you might end up with an off-idle stumble.

I seriously doubt if there's a thousand rpm there, though.


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post #550 of 844 Old 06-29-2013, 11:31 AM Thread Starter
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Might be on to something here....

Pulled the carb to close up the primaries and found one of the vac caps had fallen of the carb.

Put it right back I without touching it and fired it up. Using the idle speed screw (all the way out and not touching cam) it is idling at 1100.
Warmed up, it is idling between 840-870.

No vac advance

BUT, when I blip the throttle it stables pretty bad...

Wheel, Fix, repeatů.
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post #551 of 844 Old 06-30-2013, 09:14 AM Thread Starter
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One other thing I noticed, once it was no longer screaming, is a random slapping sound from the front of the engine...

Don't know if that is due to a fuel issue. But I never heard it before now....
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post #552 of 844 Old 06-30-2013, 06:08 PM
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I hope you didn't miss your ride today.

Live in a way that those who know you but don't know God will come to know God because they know you.
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post #553 of 844 Old 06-30-2013, 06:50 PM Thread Starter
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Originally Posted by swatson454 View Post
I hope you didn't miss your ride today.
I did....
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post #554 of 844 Old 07-01-2013, 02:11 PM
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That sucks, man. I'm sorry.

What happens if you remove the PCV inlet from the carb and plug that port? Do you have a vacuum cap large enough to do that? If not, you can use a short length of the right size hose and thread a screw into the end of it.

If that does the trick, all I can think of doing is trying to find the right (different) PCV valve. This is assuming that everything else is now correct.


Shawn

Edit: I still don't like your PCV configuration but I'm grabbing at straws here. Does your spacer have a port for a PCV inlet? If it were mine, and whether it ran well as is or not, I'd mount my PCV inlet on the spacer and move it to the front of the carb and either plug the inlet at the back of the carb or use it for the power brakes.

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post #555 of 844 Old 07-01-2013, 04:17 PM Thread Starter
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Quote:
Originally Posted by swatson454
That sucks, man. I'm sorry.
Eh.... With as screwed up as it is, it was a long shot anyway.....

EVERY vac port and line is disconnected an plugged right now,

The spacer has a spot to drill and tap it for a port,
It's basically just a recessed hole right now.

Messing with the secondaries got us close.
I'm thinking maybe downy to .010 - .015 on the primaries, and open the secondaries a hair more...???

Wheel, Fix, repeatů.
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