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Re: Thermoquad issues.... [Re: kilroy] #1277729 08/01/12 10:12 PM 08/01/12 10:12 PM
Joined: Jan 2003 Posts: 826 Stone Mt, GA. D DEMONSIZZLER super gas
DEMONSIZZLER super gas D Joined: Jan 2003 Posts: 826 Stone Mt, GA.	Thanks kilroy! Yes as Kilroy said, if the accelerator pump shot is weak and not a solid stream for the whole duration of the accelerator pump travel, that will cause a big bog. Check the pump shot with the engine off and you can see the stream better. The pump well needs to be totally free of dried gas, corrosion and the plunger(viton rubber or leather)must be in very good shape to function properly in the well id. You can take the id of the well and clean it with a piece of 600 grit sandpaper with light oil on it. Just don't gouge the well id but clean it up if needed. You can knock out the pump with a punch or #2 Phillips screwdriver by knocking on the top side of the end of the pump stem.

Re: Thermoquad issues.... [Re: DEMONSIZZLER] #1277730 08/02/12 08:11 AM 08/02/12 08:11 AM
Joined: May 2009 Posts: 411 Lexington NC twinscrew698 mopar
twinscrew698 mopar Joined: May 2009 Posts: 411 Lexington NC	Welcome back Demonsizzler!! Good to see your input here! Last edited by twinscrew698; 08/02/12 09:59 AM.

Re: Thermoquad issues.... [Re: twinscrew698] #1277731 08/02/12 01:07 PM 08/02/12 01:07 PM
Joined: May 2012 Posts: 100 Tennessee M meep_meep OP member
meep_meep OP member M Joined: May 2012 Posts: 100 Tennessee	ok folks, i got the top off the carb...the pump plunger looks to be in great shape...But i think i found the problem....I read that i should have a setting of 27/32nds on the floats, i have almost an inch and a 1/4 on both floats...this would most definitely cause a lean issue and poor pump shot lol I need to verify that 27/32nds is the correct setting on the floats...

Re: Thermoquad issues.... [Re: meep_meep] #1277732 08/02/12 01:15 PM 08/02/12 01:15 PM
Joined: May 2012 Posts: 100 Tennessee M meep_meep OP member
meep_meep OP member M Joined: May 2012 Posts: 100 Tennessee	here's what i have.... Last edited by meep_meep; 08/02/12 01:16 PM.

Re: Thermoquad issues.... [Re: meep_meep] #1277733 08/02/12 02:09 PM 08/02/12 02:09 PM
Joined: Nov 2003 Posts: 5,048 Atlanta Indiana D Dave Watt master
Dave Watt master D Joined: Nov 2003 Posts: 5,048 Atlanta Indiana	Quote: I think i'm gonna replace the pump plunger, and take a look at the transfer tube also...thanks for the tip on that While the top of the carb is off, carefully inspect the pump plunger bore in the casting for heavy pitting. This will cause some pump issues.

Re: Thermoquad issues.... [Re: Dave Watt] #1277734 08/02/12 02:10 PM 08/02/12 02:10 PM
Joined: Nov 2003 Posts: 5,048 Atlanta Indiana D Dave Watt master
Dave Watt master D Joined: Nov 2003 Posts: 5,048 Atlanta Indiana	I'm also wondering if the metering rod tree is adjusted properly. This can be a throttle transition problem.

Re: Thermoquad issues.... [Re: Dave Watt] #1277735 08/02/12 02:12 PM 08/02/12 02:12 PM
Joined: May 2012 Posts: 100 Tennessee M meep_meep OP member
meep_meep OP member M Joined: May 2012 Posts: 100 Tennessee	the plunger looks to be in new condition...no pitting at all, same story with the rest of the carb internals..i believe it's had a recent rebuild...but they forgot to set the floats correctly...

Re: Thermoquad issues.... [Re: Dave Watt] #1277736 08/02/12 02:13 PM 08/02/12 02:13 PM
Joined: May 2012 Posts: 100 Tennessee M meep_meep OP member
meep_meep OP member M Joined: May 2012 Posts: 100 Tennessee	Quote: I'm also wondering if the metering rod tree is adjusted properly. This can be a throttle transition problem. I tried multiple settings on the tree, it made no difference...

Re: Thermoquad issues.... [Re: meep_meep] #1277737 08/02/12 02:14 PM 08/02/12 02:14 PM
Joined: Nov 2003 Posts: 5,048 Atlanta Indiana D Dave Watt master
Dave Watt master D Joined: Nov 2003 Posts: 5,048 Atlanta Indiana	Quote: the plunger looks to be in new condition...no pitting at all, same story with the rest of the carb internals..i believe it's had a recent rebuild...but they forgot to set the floats correctly... The plunger seal itself or the aluminum bore where the plunger rides? The aluminum bore in the carburetor top can't have any pitting.

Re: Thermoquad issues.... [Re: Dave Watt] #1277738 08/02/12 02:19 PM 08/02/12 02:19 PM
Joined: May 2012 Posts: 100 Tennessee M meep_meep OP member
meep_meep OP member M Joined: May 2012 Posts: 100 Tennessee	the shaft hole/bore is in good shape, verified this by hand...the plunger goes up/down smoothly....

Re: Thermoquad issues.... [Re: meep_meep] #1277739 08/02/12 03:15 PM 08/02/12 03:15 PM
Joined: May 2012 Posts: 100 Tennessee M meep_meep OP member
meep_meep OP member M Joined: May 2012 Posts: 100 Tennessee	fixed it I set the floats at 29/32nds....she's running good now...thanks for all the help folks.. video

Re: Thermoquad issues.... [Re: meep_meep] #1277740 08/02/12 05:55 PM 08/02/12 05:55 PM
Joined: Jan 2003 Posts: 16,844 Between Houston & Galveston TX SattyNoCar Smarter than no class Flappergass by a mile
SattyNoCar Smarter than no class Flappergass by a mile Joined: Jan 2003 Posts: 16,844 Between Houston & Galveston TX	SUHWEET!!! Sounds real good!! Thanks for the followup. John The dream is dead, long live the dream.......😥

Re: Thermoquad issues.... [Re: SattyNoCar] #1277741 08/02/12 05:58 PM 08/02/12 05:58 PM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	Did you make any of the other suggested changes or did simply adjusting the floats fix the problem?

Re: Thermoquad issues.... [Re: ScottSmith_Harms] #1277742 08/02/12 06:02 PM 08/02/12 06:02 PM
Joined: May 2012 Posts: 100 Tennessee M meep_meep OP member
meep_meep OP member M Joined: May 2012 Posts: 100 Tennessee	Quote: Did you make any of the other suggested changes or did simply adjusting the floats fix the problem? I only adjusted the floats, since it was obviously the problem after inspection of the pump plunger turned out negative(it was in good shape)

Re: Thermoquad issues.... [Re: meep_meep] #1277743 08/02/12 09:57 PM 08/02/12 09:57 PM
Joined: Mar 2005 Posts: 862 Iowa State fan kilroy super stock
kilroy super stock Joined: Mar 2005 Posts: 862 Iowa State fan	Excellent catch!!!! I was half right sort of. 1973 Charger, former SE, former auto I'm not trying to be difficult, it comes naturally....

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