IH PARTS AMERICA
Click Here!

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

Reply
 
Thread Tools Display Modes
Old 06-30-2017, 08:41 PM   #1
BinderMoose
Junior Member
 
Join Date: Dec 2010
Member Number: 2640
Location: Kansas
Posts: 16
Default Thermoquad Questions (Big Surprise, I know)

Hey all.

Very much a carb "babe in the woods" and I did a rather silly thing. I have changed out my old Holley 2300 with thermoquad. (yes smart enough to change out manifold as well)

Anyways, while looking at vacuum line diagrams, I have noticed I don't have many of the attachments that the lines go to.

I have a non-California 77 traveler with a 345, T19, and AC.

I don't have an "air injection pump" nor do I have a carburetor bull and full tank canister."

What do I do with these lines? Just block 'em off?
__________________
-Josh

1977 Scout Traveler, 345, T-19 Close, DANA 44/44/20, 3.07 Axles
BinderMoose is offline   Reply With Quote
Old 07-06-2017, 04:16 PM   #2
1975IH200
Senior Member
 
1975IH200's Avatar
 
Join Date: Dec 2008
Member Number: 731
Location: 3rd to last cave on the right
Posts: 551
Default Re: Thermoquad Questions (Big Surprise, I know)

I run a TQ p/n 9027S on my truck. Which p/n is yours?

I would be happy to assist you.

Please post up some well focused pics of the carb, from all four sides, a top view and a few of the overall engine bay from each side so I can see what you are working with.
Attached Images
 
__________________

My Junk --> 1975 "200HD" AWD Truck
My Cave location --> Western North Carolina
1975IH200 is offline   Reply With Quote
Old 07-07-2017, 06:33 AM   #3
BinderMoose
Junior Member
 
Join Date: Dec 2010
Member Number: 2640
Location: Kansas
Posts: 16
Default Re: Thermoquad Questions (Big Surprise, I know)

Thanks, I really appreciate it.

I have a 6545S Model. I believe it is off of a Chrysler 440S engine.

I will get picks tonight or tomorrow.
__________________
-Josh

1977 Scout Traveler, 345, T-19 Close, DANA 44/44/20, 3.07 Axles
BinderMoose is offline   Reply With Quote
Old 07-08-2017, 05:15 AM   #4
BinderMoose
Junior Member
 
Join Date: Dec 2010
Member Number: 2640
Location: Kansas
Posts: 16
Default Re: Thermoquad Questions (Big Surprise, I know)

Here are the pics of the TQ. Let me know if you need any more.
Attached Images
File Type: jpg 20170707_193320.jpg (84.8 KB, 82 views)
File Type: jpg 20170707_193327.jpg (89.2 KB, 75 views)
File Type: jpg 20170707_193332.jpg (92.4 KB, 72 views)
File Type: jpg 20170707_193342.jpg (99.7 KB, 72 views)
File Type: jpg 20170707_193349.jpg (88.8 KB, 72 views)
File Type: jpg 20170707_193352.jpg (98.7 KB, 76 views)
File Type: jpg 20170707_193359.jpg (98.6 KB, 69 views)
File Type: jpg 20170707_193414.jpg (77.5 KB, 78 views)
__________________
-Josh

1977 Scout Traveler, 345, T-19 Close, DANA 44/44/20, 3.07 Axles
BinderMoose is offline   Reply With Quote
Old 07-08-2017, 11:06 AM   #5
1975IH200
Senior Member
 
1975IH200's Avatar
 
Join Date: Dec 2008
Member Number: 731
Location: 3rd to last cave on the right
Posts: 551
Default Re: Thermoquad Questions (Big Surprise, I know)

I see the hoses and ports are mostly hooked up.

Front of the carb: The large hose should be the PCV hose.
The small hose on the left should go directly to the distributor Vacuum advance.
Brass tube from airhorn you can cap off.
Small brass tube coming from fwd-rh venturi - this the source for the EGR valve.
Large tube from top of RH bowl, with the bend goes to the charcoal canister or capped of like your is if there is not a charcoal canister.

Rear of the carb: choke pull-off goes to right rear port as your is.
and left rear port goes to the firewall mounted DTM device.
__________________

My Junk --> 1975 "200HD" AWD Truck
My Cave location --> Western North Carolina

Last edited by 1975IH200; 07-16-2017 at 07:20 PM..
1975IH200 is offline   Reply With Quote
Old 07-09-2017, 07:07 PM   #6
BinderMoose
Junior Member
 
Join Date: Dec 2010
Member Number: 2640
Location: Kansas
Posts: 16
Default Re: Thermoquad Questions (Big Surprise, I know)

Here is a drawing of how I have the vacuum lines set up after your last post. Was actually able to run it down the road like this.
__________________
-Josh

1977 Scout Traveler, 345, T-19 Close, DANA 44/44/20, 3.07 Axles

Last edited by BinderMoose; 07-09-2017 at 07:14 PM..
BinderMoose is offline   Reply With Quote
Old 07-09-2017, 07:10 PM   #7
1975IH200
Senior Member
 
1975IH200's Avatar
 
Join Date: Dec 2008
Member Number: 731
Location: 3rd to last cave on the right
Posts: 551
Default Re: Thermoquad Questions (Big Surprise, I know)

Looks good to me. Good drawing.

Do you have the stock IH air cleaner housing?

I'll look at my truck/carb tomorrow in the light and see if I can add any more info for you.

EDIT: Nothing new for hose connections as all seem to be correct as is, although I see no feedback from you since the 9th.

Also, you took down your drawing, so this info is somewhat meaningless for anyone else that comes along and reads it.
__________________

My Junk --> 1975 "200HD" AWD Truck
My Cave location --> Western North Carolina

Last edited by 1975IH200; 07-16-2017 at 07:23 PM..
1975IH200 is offline   Reply With Quote
Old 07-26-2017, 10:16 PM   #8
1975IH200
Senior Member
 
1975IH200's Avatar
 
Join Date: Dec 2008
Member Number: 731
Location: 3rd to last cave on the right
Posts: 551
Default Re: Thermoquad Questions (Big Surprise, I know)

Here is a Vacuum Diagram for the Therm0-Quad installation.
This may be useful.
Attached Images
File Type: pdf Thermo-Quad Vacuum Diagram.PDF (2.02 MB, 69 views)
__________________

My Junk --> 1975 "200HD" AWD Truck
My Cave location --> Western North Carolina
1975IH200 is offline   Reply With Quote
Old 07-27-2017, 03:31 AM   #9
BinderMoose
Junior Member
 
Join Date: Dec 2010
Member Number: 2640
Location: Kansas
Posts: 16
Default Re: Thermoquad Questions (Big Surprise, I know)

Sorry about the long lapse. I will put my diagram back up. Trying to remember why i took it down. Reason seemed good at time though, whatever it was.

I have had quite the carburetor odessey since I last posted. After the Scout continued to idle poorly, I took the carb off and re-cleaned it and found more plugged passages especially with my idle system.

During reinstallation, I heard a loud crack and I hoped for the best, but knew it was a fools hope. I was right. I drove the truck with the carb that night and boy it ran awesome for about 30 miles. Then....it ran rough and started surging.

The next morning, in the light, I saw what the loud crack was... I had broke the throttle body while bolting the carb back to the manifold.

Not an easy story to relate, but maybe it will help another noob to NOT tighten the carb too tight!

I was able to procure another TQ off og a 79 Scout quickly and after a quick inspection and a lot of carb cleaner it is on and running ok. Still needs some tuning.

Also, another lesson learned: soak your gaskets with wd40 for easy disassembly. The carb will likely make multiple trips on and off the manifold and ruined gaskets can eat into the budget.
__________________
-Josh

1977 Scout Traveler, 345, T-19 Close, DANA 44/44/20, 3.07 Axles
BinderMoose is offline   Reply With Quote
Old 07-27-2017, 08:20 AM   #10
1975IH200
Senior Member
 
1975IH200's Avatar
 
Join Date: Dec 2008
Member Number: 731
Location: 3rd to last cave on the right
Posts: 551
Default Re: Thermoquad Questions (Big Surprise, I know)

Sorry for your T-Q troubles.

I find with any carb, a full teardown, cleaning and rebuild with a full rebuild kit and new float(s) always gives the best results.

With the Thermo-Quad especially, there are many adjustments and settings that are made as the carb & linkages are assembled.

They must be done correctly and in a specific order. Otherwise, your results will not be satisfactory.
__________________

My Junk --> 1975 "200HD" AWD Truck
My Cave location --> Western North Carolina
1975IH200 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 07:39 PM.