Help me solve this blasted Pinging.... - Page 24 - JeepForum.com
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post #346 of 844 Old 06-04-2013, 10:48 AM
swatson454
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Quote:
Originally Posted by Matt1981CJ7 View Post
Perhaps it's that massive amount of blow-by, misting the entire carb, that's causing the throttle plate to hang up? Dunno.

I've kinda lost track of where we were on this one.

Matt
After giving that particular issue some thought, I think that may be a product of the way Offy divides their intakes up. I think the PCV inlet needs to be moved from the back of the carb up to the primaries.

We'll burn that bridge when we get there

Speaking of which: 2X, is that an open-hole spacer, 4-hole or what?


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post #347 of 844 Old 06-04-2013, 11:05 AM Thread Starter
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Quote:
Originally Posted by Matt1981CJ7 View Post
....I've kinda lost track of where we were on this one.
Me too.....

Quote:
Originally Posted by swatson454 View Post
...is that an open-hole spacer, 4-hole or what?
It's an open hole spacer, 1" thick.

A couple of questions:
Was it correct of me to have the vac advance disconnected, and would that be the issue?

Could that Qtrac line not being hooked up (don't remember which it was) be the issue?

I won't get back to the garage until tomorrow, or the next night.
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post #348 of 844 Old 06-04-2013, 11:28 AM
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Once you get the timing set, which I believe you have, you hook everything back up and that's the way it stays.

Savvy?

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post #349 of 844 Old 06-04-2013, 11:40 AM Thread Starter
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Savvy.

So I should have connected the advance.

But having it disconnected and plugged would not have a bearing on idle speed, correct?
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post #350 of 844 Old 06-04-2013, 12:25 PM
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post #351 of 844 Old 06-04-2013, 12:42 PM
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I hate to ask this, but did you try poking something in the hole for the pcv or vent hole towards rear of engine?

Their could be way too much sludge and gunk built up on the head preventing to oil from draining back properly and the PCV is picking it up.

If you have .020 of the transfer slot exposed like recommend in both sets of plates and you have a high idle...... something is incorrect.

Is the spacer interfering? Can you see the throttle shaft move when you set carb on spacer?
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post #352 of 844 Old 06-04-2013, 12:56 PM
Matt1981CJ7
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2X,

In case you've lost sight of it, your goal was to set initial timing, then plot the centrifugal advance curve. That all should be done with the vac advance disconnected and the line plugged.

Matt
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post #353 of 844 Old 06-04-2013, 01:03 PM Thread Starter
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Originally Posted by 86cj74.2L View Post
I hate to ask this, but did you try poking something in the hole for the pcv or vent hole towards rear of engine?

Their could be way too much sludge and gunk built up on the head preventing to oil from draining back properly and the PCV is picking it up.

If you have .020 of the transfer slot exposed like recommend in both sets of plates and you have a high idle...... something is incorrect.

Is the spacer interfering? Can you see the throttle shaft move when you set carb on spacer?
No, I haven't poked it. But I guess I should....

The thing about the .020" on both sets of transfer slots that has me confused (and I pulled this from another site so I didn't have to type it) is:

"...the secondary transition slots on a Holley are often located higher in the throttle bores than on the primary side: If you try to obtain the .020 transition exposure on the secondary side of a Holley, you will often end up with the secondary's opened significantly more than the primaries."
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post #354 of 844 Old 06-04-2013, 01:05 PM Thread Starter
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Originally Posted by Matt1981CJ7 View Post
2X,

In case you've lost site of it, your goal was to set initial timing, then plot the centrifugal advance curve. That all should be done with the vac advance disconnected and the line plugged.

Matt
Trying to keep site of the entrance to this rabbit hole.... lol

At this point, I have the Initial timing set (at 7*).
So for getting the idle set (so I can go back and rechart the advance) I should hook everything back up....

Then I can unhook/ plug the vac adv and chart the advance.

....IF I understand correctly.
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post #355 of 844 Old 06-04-2013, 01:25 PM
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Way back on post #253 John Strenk said:

1. Remove Vacuum advance, plug hose so no leaks
2. Set idle speed low as possible
3. Time engine (idle speed can increase or decrease with changes in timing, lower if it gets to high)
4. Re-connect Vacuum advance
5. RESET idle speed if needed.


I can't make it more simple than that, other than to explain each step:

1. The vac advance hose is disconnected and plugged so that there is no vac advance while setting initial timing.
2, The idle should be as low as possible because you don't want any centrifugal advance while setting initial timing.
3. Time engine by slowly turning the distributer until the initial is somewhere around 8 degrees BTDC.
4. Re-connecting the vac advance to manifold vacuum will add advance to the idle, perhaps increasing idle speed higher than you like. If so....
5. RESET idle speed, if needed.

Until those basic 5 steps are accomplished we're all just pi$$ing in the wind, here.

Matt
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post #356 of 844 Old 06-04-2013, 01:34 PM Thread Starter
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Quote:
Originally Posted by Matt1981CJ7 View Post
Way back on post #253 John Strenk said:

1. Remove Vacuum advance, plug hose so no leaks
2. Set idle speed low as possible
3. Time engine (idle speed can increase or decrease with changes in timing, lower if it gets to high)
4. Re-connect Vacuum advance
5. RESET idle speed if needed.


I can't make it more simple than that, other than to explain each step:

Until those basic 5 steps are accomplished we're all just pi$$ing in the wind, here.

Matt
Sorry Matt, I didn't realize this carb thing set me all the way back to Step 2.

Makes sense. I guess i was just being hopeful...
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post #357 of 844 Old 06-04-2013, 01:53 PM
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If I understand correctly his tape fell off and he wanted to get the idle lower and so far has not been able too, so he could verify their was no more advance in it.

And he didn't take the RPM's out to 3000 during his first plot.

He has a problem with pinging

He has a problem with high idle

He has a problem with way too much oil in his PCV system.
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post #358 of 844 Old 06-04-2013, 03:05 PM Thread Starter
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He has a problem being a complete and utter IDIOT!!

Just swung by the garage to pick something up and figured I'd take a quick peek at the engine compartment.

You'll never guess what I found....

I FORGOT TO HOOK UP THE GD PCV LINE TO THE CARBURETOR...AAARGH!!

I don't know how I could have made such a mistake.....

Couldn't do anything about it tonight, since I was still in my work clothes and have dinner plans.

My apologies for complicating this step..
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post #359 of 844 Old 06-04-2013, 03:20 PM
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Hell, that's nothing. Glad you found it, though.

If you verified that the throttle plate actually closes now, we might be able to move on to the next step.


Shawn

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post #360 of 844 Old 06-04-2013, 10:29 PM
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If you don't have a new timing tape, carefully lay the old one out that fell off on a workbench.
Beside it lat a piece of VERY good duct tape, transcribe the marks carefully.
You don't need the whole tap marked, basically from "0" to "50" degrees.
Then clean the balancer with actetone or mek thouroghly, stick the duct tape on, "0" on your corrected mark.
Then proceed.
The duct tape sticks way better than a timing tape, learned it the hard way.....

Russell

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