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Unread 05-07-2013, 01:32 PM   #31
86cj74.2L
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One of two things are going to happen.

1) you are going to pay your mechanic into being a better mechanic.

2) you are going to stop paying someone to do your learning and learn how to fix it yourself.

Option two is the better option. We are all here for you.

The jeep will put you in the poor house if you pay someone to fix it all the time.

EGR would go a long way to helping control detonation. But with headers that's not really a option

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Unread 05-07-2013, 02:41 PM   #32
LumpyGrits
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What octane gas you run'n?
Switch to the highest octane prem. you can find.
Also, make sure you spark plugs are correct, To hot a plug will induce a 'ping'.
ALSO, you MUST learn to turn your own wrenches........
LG
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Unread 05-07-2013, 04:00 PM   #33
2Xtreme
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As usual, all good info!

Let me say I don't mind learning as I go, but we all have things outside of our comfort zone. Timing is something I have never dealt with, and that is why i am posting. I initially paid someone to do it because I had an event coming up and didn't wan't to get it so screwed up I couldn't go. That being said, I didn't make it for other reasons....

I also do intend to do the plugs, wires, etc when I get back. That was part of my initial question - does it make sense to do a 'stock' tune up, or go for one of the ignition upgrades?

I have tried Super in the tank and even added octane booster to it, with no improvement (before i went to mechanic).

So I just got back from taking pics at the garage (Ssshhhh!) beore jumping on the road. This is what I found:
The vac line that Matt asked about runs into a hard line before another soft line that runs INTO THE PASSENGER'S COMPARTMENT???
Here is a pic that should show it...


THAT doesn't seem right.....
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Unread 05-07-2013, 08:38 PM   #34
John Strenk
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Uhhhh WOW.
Got a picture of your dash? Maybe there was a vacuum gauge on it allready.. Cant think of any other reason to run a vacuum line in there unless it has a YJ heater...


any vacuum gauge will do as long as it has a long enough hose. Those with hooks on them are nice also.

The bigger the dial, the easier to read. Usually they also have a fuel pressure gauge built in..
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Unread 05-07-2013, 10:04 PM   #35
2Xtreme
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Nope. No sign of a vacuum gauge installed previously. Just a stock dash with a big ol' hole where a radio was....

So, I guess the question becomes where SHOULD that port be connected to?
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Unread 05-07-2013, 10:10 PM   #36
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Quote:
Originally Posted by swatson454
Did you check the link I posted on finding TDC? A degree wheel is not needed ....
I did. Quickly. It was a very busy day at work. Trying to get out of there for vaca and all.

But I thought that is where I saw mention of a degree wheel....(?)
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Unread 05-07-2013, 10:26 PM   #37
86cj74.2L
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Quote:
Originally Posted by 2Xtreme
Nope. No sign of a vacuum gauge installed previously. Just a stock dash with a big ol' hole where a radio was....

So, I guess the question becomes where SHOULD that port be connected to?
Follow it and tell us where it goes.

As John says unless you have a vacuum gauge or a newer heater box that uses vacuum motors instead of cables to operate things it should not be there.

Hopefully if it does nothing it's capped off.
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Unread 05-08-2013, 03:23 AM   #38
keith460
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Are you sure you have a Dana 20 transfer case and not a Quadratrac unit?

That would explain the vacuum hoses going into the dash. Quadratrac TC units had a vacuum operated switch mounted in the glove box to switch from high to low 4x4 and vice verse. The switch could have been removed from a PO and then plugged the ends of the vacuum lines.
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Unread 05-08-2013, 04:33 AM   #39
John Strenk
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Good point. Forgot about that...
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Unread 05-08-2013, 05:33 AM   #40
Matt1981CJ7
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Quote:
Originally Posted by 2Xtreme View Post

So, I guess the question becomes where SHOULD that port be connected to?
Assuming it's not used for a Quadratrac, or some other purpose, I'd connect your distributer to it, and cap the s-port nipple.

Matt
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Unread 05-08-2013, 09:29 AM   #41
2Xtreme
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Quote:
Originally Posted by keith460 View Post
Are you sure you have a Dana 20 transfer case and not a Quadratrac unit....?
Holy Crap!
I DO have a Quadratrac unit! And that must be where it goes
I filled out my profile back when I had even less Jeep knowledge than I have now, if you can believe that's possible....
Guess I'd better go back and change that!

That being said, is that a proper way to connect that port on the carb and/or the switch...?
They two seem unrelated, so I have to wonder if that is right.

(For a second ther, I thought you guys had provided me with an easy fix. Or an additional complication.....)
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Unread 05-08-2013, 10:23 AM   #42
lucdog
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Quote:
Originally Posted by keith460
Are you sure you have a Dana 20 transfer case and not a Quadratrac unit?

That would explain the vacuum hoses going into the dash. Quadratrac TC units had a vacuum operated switch mounted in the glove box to switch from high to low 4x4 and vice verse. The switch could have been removed from a PO and then plugged the ends of the vacuum lines.
Not quite correct, the vacuum switch in the glove box locks the front and rear axles together for 4 wheel drive.
The low/high lever is on the drivers side close to the seat mount on the floor , it's mounted on the side of the transmission tunnel .
I know you know this Keith, just wanted to keep the OP from getting confused.
OP, there should actually be 3 small vacuum lines thru the firewall, if everything is connected as it was from the factory.
Bill
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Unread 05-08-2013, 10:45 AM   #43
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Is this it? http://www.ifsja.org/forums/vb/showthread.php?t=138189 Diagram. lucdog, I was only 11, but my dads' '77 Grand had the knob, but no lever. Is this possible?
qt_tc_vacuum_diagram_l.jpg  
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Unread 05-08-2013, 11:00 AM   #44
TIPPEDITOVER
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Quote:
Originally Posted by 2Xtreme View Post
When we installed the carb the floats were set and to be honest the thing ran great (then).
This would have been good information to have about 3 pages ago.
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Unread 05-08-2013, 11:28 AM   #45
lucdog
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Quote:
Originally Posted by hutch1200
Is this it? http://www.ifsja.org/forums/vb/showthread.php?t=138189 Diagram. lucdog, I was only 11, but my dads' '77 Grand had the knob, but no lever. Is this possible?
Yep , the low range unit was/may have been a option. And I think the Waggys had the lever in a slightly different location.

Bill
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1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
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