IH PARTS AMERICA
Click Here!

Go Back   IH PARTS AMERICA > Tech Forums > Ignition Tech
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read Photo Gallery IH Store Home

Reply
 
Thread Tools Display Modes
Old 09-08-2012, 05:56 AM   #16
doubleR
Member
 
doubleR's Avatar
 
Join Date: Sep 2012
Member Number: 4932
Location: Ohio
Age: 54
Posts: 46
Default Re: always surgeing

Hallaluh, I think I May have figured it out. There was a plumbing goof, that I think created an internal vacuum leak. It now purrs like a kitten will idle down. Waiting on the roads to dry to test drive.
Being my first binder and figuring out what should be and what shouldn't be, depending on what the prev. Owner had done 20yrs ago has been a chalenge.
doubleR is offline   Reply With Quote
Old 09-08-2012, 08:37 AM   #17
Scoutboy74
Moderator
 
Scoutboy74's Avatar
 
Join Date: Apr 2008
Member Number: 453
Location: Daze Crick, Jefferson
Posts: 3,788
Default Re: always surgeing

A vac leak will certainly cause the issues you were having. That would also be represented on a vac gauge as a low and/or fluctuating reading. A healthy engine properly tuned at low altitude should be capable of a steady 20 or slightly higher hg reading on the vac gauge at hot curb idle.
__________________
Favorite hobby...Driving Salma Hayek in my Scout

Coal Trickle - '99 Dodge Ram 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500
Hooty - '74 SII - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/RC 4" SUA/34x10.5 TSLs/33g Fuel/HFT 8k winch
Mongo - '71 1210 Std Cab 2WD - 345/TF727/RA17 D60 4.10 Trac-lok - "Mongo love candy! Duh, huh, huh!"
Scoutboy74 is offline   Reply With Quote
Old 09-08-2012, 06:08 PM   #18
doubleR
Member
 
doubleR's Avatar
 
Join Date: Sep 2012
Member Number: 4932
Location: Ohio
Age: 54
Posts: 46
Default Re: always surgeing

It purrs like a kitten, I can lower the idle down to 400rpm. I opened the air/fuel screws to 2 turns and it died, so far it is at its best at 1 1/4 out but there is still surgeing, mainly on accelerating. To refresh it has a reman 350cfm Holley 7448 carb with a 10" air filter, new 5/16" steel line from tank to carb, new fuel filter, and a cardone reman Holley points dist.
Since m&m said ignition affects carburation, thats why I posted this issue under the ignition tech thread
doubleR is offline   Reply With Quote
Old 09-08-2012, 06:52 PM   #19
Scoutboy74
Moderator
 
Scoutboy74's Avatar
 
Join Date: Apr 2008
Member Number: 453
Location: Daze Crick, Jefferson
Posts: 3,788
Default Re: always surgeing

Somethin' ain't stirrin' the kool-aid here, bubba. Your engine should have no trouble whatsoever running with the idle mix screws at 2 or even 2.5 turns out on both sides. A little Rich maybe, but should run well enough. In fact, right now your engine should be stumbling, gasping, and starving for fuel like nobody's business at only 1.25 turns out. You need to get a vacuum gauge hooked up to manifold vacuum and take a reading. Without that, you're chasing your tail, and so are those of us trying to help.
To mayben's point that you brought up...carb tuning does not effect ignition or spark timing, but ignition adjustments can effect carb tuning. That is why it is often necessary to make minor carb tweaks following changes/adjustments to the ignition system.
__________________
Favorite hobby...Driving Salma Hayek in my Scout

Coal Trickle - '99 Dodge Ram 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500
Hooty - '74 SII - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/RC 4" SUA/34x10.5 TSLs/33g Fuel/HFT 8k winch
Mongo - '71 1210 Std Cab 2WD - 345/TF727/RA17 D60 4.10 Trac-lok - "Mongo love candy! Duh, huh, huh!"
Scoutboy74 is offline   Reply With Quote
Old 09-09-2012, 07:59 AM   #20
doubleR
Member
 
doubleR's Avatar
 
Join Date: Sep 2012
Member Number: 4932
Location: Ohio
Age: 54
Posts: 46
Default Re: always surgeing

I took some readings, timing at 6 deg. Btdc, idle at 600,
intake manifold vacuum 16-17 flucates with the slight miss.

Compression:
1-132 2-135
3-132 4-143
5-135 6-135
7-130 8-145

accelerating is rough, maintaining a steady speed alot smoother.
Yesterday on one of my rides, I kept advancing the timing this morning I put a light on on it and it was up close to 20deg. Btdc

does this seem feasible that I was able to advance it that far without terribily affecting the driveability? Could it be I May be 1 tooth off on stabbing the dist? It idles so smooth except for the slight miss.

It has new points, condenser, rotor, dist. Cap, wires, plugs and wires about a year old but not alot of miles.

There is a sticky lifter you can hear ticking on occassion
(rt. Side) the slight miss at idle is constant.
doubleR is offline   Reply With Quote
Old 09-09-2012, 09:32 AM   #21
Bill Bennett
Senior Member
 
Join Date: Jan 2009
Member Number: 747
Location: Torrance, CA
Posts: 194
Default Re: always surgeing

While you seem to have covered the 'normal' places to check, you haven't said 'which' sparkplugs were installed and did you verify the plug gap? With a stock coil, try 32/1000. You have replaced the distributor but have you checked the 'dwell' of the points gap? Should read between 28 to 32 degrees. Was any 'lube' applied to the cam surface or 'rubbing block' of the points to cut down on wear? As for if it was stabbed correctly, it is - or the motor would not be running. There should be a number on the 'arm' of the vacuum advance unit. The number indicates the amount of additional advance supplied by the vacuum advance. As the dist is a reman unit, it will help to know the amount of 'mechanical advance' and the rate of advance. Then the vacuum advance will be added to the total.
Meanwhile, consider replacing the concenser in the distributor.
Bill Bennett is offline   Reply With Quote
Old 09-09-2012, 09:40 AM   #22
doubleR
Member
 
doubleR's Avatar
 
Join Date: Sep 2012
Member Number: 4932
Location: Ohio
Age: 54
Posts: 46
Default Re: always surgeing

By golly I think I found the culprit. I was checking to see if I had stabbed the dist. Right and that checked ok. I started checking my plug wires on the dist. That had a 90deg. Boot and 1 of them wasn't in all the way, straightened that out and that got rid of the slight miss. Rechecked the intake vac. With the air/fuel screws at 1.25 turns was holding steady at 19.5.

We just had quite a rain shower go thru, when the roads dry up some goin go for a ride, I am quite sure its going to be better.
doubleR is offline   Reply With Quote
Old 09-09-2012, 04:24 PM   #23
doubleR
Member
 
doubleR's Avatar
 
Join Date: Sep 2012
Member Number: 4932
Location: Ohio
Age: 54
Posts: 46
Default Re: always surgeing

Yep runs like a new truck now, smooth as silk. I have opened the air/fuel screws a little more to almost 1.5 turns. Thought I would run that a little while then check spark plug color.
Thanks for all your help.
doubleR is offline   Reply With Quote
Old 11-21-2017, 10:53 AM   #24
Robert Kenney
IHPA Tech Moderator
 
Robert Kenney's Avatar
 
Join Date: Aug 2008
Member Number: 543
Location: La Verne
Age: 48
Posts: 3,242
Default Re: always surgeing

Oil Scout, I moved your threads to it's own post in, Carb Tech.
http://forums.ihpartsamerica.com/showthread.php?t=13738
__________________
Robert Kenney

People preach " Don't over think life, just go where it takes you". But I can't help but think of the Wise Ancient Mariner who looks toward the horizon for any sign of storm clouds.
Robert Kenney is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 06:00 AM.